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1992 Volume 9 Issue 6
1992, 9(6): 1-5
Abstract:
Nine Schiff base complexes of Co(Ⅱ),Ni(Ⅱ)and Cu(Ⅱ) have been synthesized by onestep solid state reactions at room temperature to 70℃. The results of elemental analysis, IR, XRD, and DTA show that the products synthesized are pure compounds. The effects of structure of both Schiff base and metal acetate on the solid state reaction are discussed.
Nine Schiff base complexes of Co(Ⅱ),Ni(Ⅱ)and Cu(Ⅱ) have been synthesized by onestep solid state reactions at room temperature to 70℃. The results of elemental analysis, IR, XRD, and DTA show that the products synthesized are pure compounds. The effects of structure of both Schiff base and metal acetate on the solid state reaction are discussed.
1992, 9(6): 6-10
Abstract:
In the solution of 0.4KOH+0.6mol NH4Cl+0.1Im. mol/L (pH=9.5), the irradiation of UV-Vis light has great effects on the formation of ZnTPPS. The experimental results of photopolarography have shown that the relationship between photocurrent (ip) and concentration (C) are:ip∝C(Zn)(NH3)42+1/2 for Zn(NH3)42+and ip∝CH2TPPS for the third reduetive wave (P3) of H2TPPS, respectively, while the first reductive wave (P1) of H2TPPS and the wave Pc of ZnTPPS do not produce photocurrent. The differences in photoeurrents were discussed briefly.
In the solution of 0.4KOH+0.6mol NH4Cl+0.1Im. mol/L (pH=9.5), the irradiation of UV-Vis light has great effects on the formation of ZnTPPS. The experimental results of photopolarography have shown that the relationship between photocurrent (ip) and concentration (C) are:ip∝C(Zn)(NH3)42+1/2 for Zn(NH3)42+and ip∝CH2TPPS for the third reduetive wave (P3) of H2TPPS, respectively, while the first reductive wave (P1) of H2TPPS and the wave Pc of ZnTPPS do not produce photocurrent. The differences in photoeurrents were discussed briefly.
1992, 9(6): 11-15
Abstract:
An optically transparent platinium minigrid thin-layer spectroelectrochemical cell (OTTLSEC) with two platinium plates at each side of working electrode(WE) as auxiliary electrodes was designed and constructed. The WE, AE and two quartz plates form a "sandwich" with teflon film as the eliminator for minimizing the edge diffusional effect, A small inner channel sets an internal reference point for accurate potential control. Symmetrical thin-layer cyclic voltammograms with negligible peak-to-peak separation were obtained by this cell for ferri/ferrocyanide couple at low scan rates. The excellent optical and electrochemical responses of this couple in the cell by cyclic voltammetry, cyclic voltaabsorptometry, constant potential control in situ spectrum, double potential step-chronoabsorptometry and double potential step-chronocoulometry were achieved.
An optically transparent platinium minigrid thin-layer spectroelectrochemical cell (OTTLSEC) with two platinium plates at each side of working electrode(WE) as auxiliary electrodes was designed and constructed. The WE, AE and two quartz plates form a "sandwich" with teflon film as the eliminator for minimizing the edge diffusional effect, A small inner channel sets an internal reference point for accurate potential control. Symmetrical thin-layer cyclic voltammograms with negligible peak-to-peak separation were obtained by this cell for ferri/ferrocyanide couple at low scan rates. The excellent optical and electrochemical responses of this couple in the cell by cyclic voltammetry, cyclic voltaabsorptometry, constant potential control in situ spectrum, double potential step-chronoabsorptometry and double potential step-chronocoulometry were achieved.
1992, 9(6): 16-20
Abstract:
Thirteen ternary complexes were synthesized by the reaction of rare earth ions(Ⅲ) (La3+、Pr3+、Nd3+、Sm3+-Yb3+ and Y3+) with maleic acid and 1,10-phenanthroline(Phen) in C2H5OH-H2O(1:1) solution. Elemental analyses indicate that the complexes have a composition of Ln2(C4H2O4)3(Phen)24H2O. UV, IR spectra luminescence and thermal properties of the complexes also have been reported.
Thirteen ternary complexes were synthesized by the reaction of rare earth ions(Ⅲ) (La3+、Pr3+、Nd3+、Sm3+-Yb3+ and Y3+) with maleic acid and 1,10-phenanthroline(Phen) in C2H5OH-H2O(1:1) solution. Elemental analyses indicate that the complexes have a composition of Ln2(C4H2O4)3(Phen)24H2O. UV, IR spectra luminescence and thermal properties of the complexes also have been reported.
1992, 9(6): 21-25
Abstract:
The correlations of the calcination temperature,crystal structure and catalytic activity of La0.9Sr0.1NiO3 for ammoxidation have been studied.When the calcination temperature is above 1223K, the perovskite structure of La0.9Sr0.1NiO3 is decomposed into three phases, i.e. La2NiO4, LaNiO3, and NiO. The LaNiO3 perovskite phase is the most active phase for ammoxidation.The catalyst calcinated at 1273K has the highest activity.
The correlations of the calcination temperature,crystal structure and catalytic activity of La0.9Sr0.1NiO3 for ammoxidation have been studied.When the calcination temperature is above 1223K, the perovskite structure of La0.9Sr0.1NiO3 is decomposed into three phases, i.e. La2NiO4, LaNiO3, and NiO. The LaNiO3 perovskite phase is the most active phase for ammoxidation.The catalyst calcinated at 1273K has the highest activity.
1992, 9(6): 26-30
Abstract:
The effect of three rare earth oxides, La2O3, Y2O3, and a mixture of rare earth oxides on the crystallization behavior of isotactic polypropylene (iPP) has been studied via differential scanning calorimetry (DSC). Avrami exponents n, the mechanism of nucleation, spherulite growth style and the crystal form of iPP have not been influenced badly by the rare earth oxides during the isothermal crystallization. However, a little of rare earth oxides will increase the crystallization rate and decrease the fold surface free energy, σc, remarkable. This effect for Y2O3 most obvious and lowest for La2O3. The effect of the mixture of rare earth oxides is similar to the effect of Y2O3. By adding 1 wt% Y2O3 into iPP, the overall rate constant k in Avrami equation increases in one order.
The effect of three rare earth oxides, La2O3, Y2O3, and a mixture of rare earth oxides on the crystallization behavior of isotactic polypropylene (iPP) has been studied via differential scanning calorimetry (DSC). Avrami exponents n, the mechanism of nucleation, spherulite growth style and the crystal form of iPP have not been influenced badly by the rare earth oxides during the isothermal crystallization. However, a little of rare earth oxides will increase the crystallization rate and decrease the fold surface free energy, σc, remarkable. This effect for Y2O3 most obvious and lowest for La2O3. The effect of the mixture of rare earth oxides is similar to the effect of Y2O3. By adding 1 wt% Y2O3 into iPP, the overall rate constant k in Avrami equation increases in one order.
1992, 9(6): 31-35
Abstract:
Cr(Ⅵ) was quantitatively adsorbed by 4-amino-1,2,4-triazole resin(4-ATR) in a medium of pH=1,but Cr3+ almost could not be adsorbed. The separation coefficient βCr(Ⅵ)/Cr3+ is as high as 5.52×103. The statically saturated sorption capacity is 179.4mg Cr(Ⅵ)/gresin[3.45 mmol Cr(Ⅵ)/g resin]. Cr(Ⅵ) adsorbed on 4-ATR can be reductively eluated by 5mol/L HCL. The sorption rate constants determined under various temperatures were k21℃=1.59×1O-3S-1,k25℃=1.87×10-3S-1 and k30℃=2.2×10-3S-1,respectively. The apparent activation energy of sorption E2 is 26.26kJ/mol.The thermodynamic parameters of sorption,enthalpy ΔH298,freeenergy ΔG298,and entropy ΔS298 of sorption (4-ATR) for Cr(Ⅵ) are 86.16, -15.1 kJ/mol,and 339.8 J/mol·Κ,respectively.Coordination molar ratio of Cr(Ⅵ)to -NH-H???19920607??? is 1:1. The sorption mechanism shows that the nitrogen atoms of the functional group of 4-ATR coordinated with Cr(Ⅵ) to form coordination bond. The 4-ATR can be used in the separation of Cr(Ⅵ) from the waste electroplating water. The percentage of recovery of chromium is 95.7.%., Cr(Ⅵ) was quantitatively adsorbed by 4-amino-1,2,4-triazole resin(4-ATR) in a medium of pH=1,but Cr3+ almost could not be adsorbed. The separation coefficient βCr(Ⅵ)/Cr3+ is as high as 5.52×103. The statically saturated sorption capacity is 179.4mg Cr(Ⅵ)/gresin[3.45 mmol Cr(Ⅵ)/g resin]. Cr(Ⅵ) adsorbed on 4-ATR can be reductively eluated by 5mol/L HCL. The sorption rate constants determined under various temperatures were k21℃=1.59×1O-3S-1,k25℃=1.87×10-3S-1 and k30℃=2.2×10-3S-1,respectively. The apparent activation energy of sorption E2 is 26.26kJ/mol.The thermodynamic parameters of sorption,enthalpy ΔH298,freeenergy ΔG298,and entropy ΔS298 of sorption (4-ATR) for Cr(Ⅵ) are 86.16, -15.1 kJ/mol,and 339.8 J/mol·Κ,respectively.Coordination molar ratio of Cr(Ⅵ)to -NH-H
3+ almost could not be adsorbed. The separation coefficient βCr(Ⅵ)/Cr3+ is as high as 5.52×103. The statically saturated sorption capacity is 179.4mg Cr(Ⅵ)/gresin[3.45 mmol Cr(Ⅵ)/g resin]. Cr(Ⅵ) adsorbed on 4-ATR can be reductively eluated by 5mol/L HCL. The sorption rate constants determined under various temperatures were k21℃=1.59×1O-3S-1,k25℃=1.87×10-3S-1 and k30℃=2.2×10-3S-1,respectively. The apparent activation energy of sorption E2 is 26.26kJ/mol.The thermodynamic parameters of sorption,enthalpy ΔH298,freeenergy ΔG298,and entropy ΔS298 of sorption (4-ATR) for Cr(Ⅵ) are 86.16, -15.1 kJ/mol,and 339.8 J/mol·Κ,respectively.Coordination molar ratio of Cr(Ⅵ)to -NH-H
is 1:1. The sorption mechanism shows that the nitrogen atoms of the functional group of 4-ATR coordinated with Cr(Ⅵ) to form coordination bond. The 4-ATR can be used in the separation of Cr(Ⅵ) from the waste electroplating water. The percentage of recovery of chromium is 95.7.%., Cr(Ⅵ) was quantitatively adsorbed by 4-amino-1,2,4-triazole resin(4-ATR) in a medium of pH=1,but Cr3+ almost could not be adsorbed. The separation coefficient βCr(Ⅵ)/Cr3+ is as high as 5.52×103. The statically saturated sorption capacity is 179.4mg Cr(Ⅵ)/gresin[3.45 mmol Cr(Ⅵ)/g resin]. Cr(Ⅵ) adsorbed on 4-ATR can be reductively eluated by 5mol/L HCL. The sorption rate constants determined under various temperatures were k21℃=1.59×1O-3S-1,k25℃=1.87×10-3S-1 and k30℃=2.2×10-3S-1,respectively. The apparent activation energy of sorption E2 is 26.26kJ/mol.The thermodynamic parameters of sorption,enthalpy ΔH298,freeenergy ΔG298,and entropy ΔS298 of sorption (4-ATR) for Cr(Ⅵ) are 86.16, -15.1 kJ/mol,and 339.8 J/mol·Κ,respectively.Coordination molar ratio of Cr(Ⅵ)to -NH-H is 1:1. The sorption mechanism shows that the nitrogen atoms of the functional group of 4-ATR coordinated with Cr(Ⅵ) to form coordination bond. The 4-ATR can be used in the separation of Cr(Ⅵ) from the waste electroplating water. The percentage of recovery of chromium is 95.7.%.
Cr(Ⅵ) was quantitatively adsorbed by 4-amino-1,2,4-triazole resin(4-ATR) in a medium of pH=1,but Cr3+ almost could not be adsorbed. The separation coefficient βCr(Ⅵ)/Cr3+ is as high as 5.52×103. The statically saturated sorption capacity is 179.4mg Cr(Ⅵ)/gresin[3.45 mmol Cr(Ⅵ)/g resin]. Cr(Ⅵ) adsorbed on 4-ATR can be reductively eluated by 5mol/L HCL. The sorption rate constants determined under various temperatures were k21℃=1.59×1O-3S-1,k25℃=1.87×10-3S-1 and k30℃=2.2×10-3S-1,respectively. The apparent activation energy of sorption E2 is 26.26kJ/mol.The thermodynamic parameters of sorption,enthalpy ΔH298,freeenergy ΔG298,and entropy ΔS298 of sorption (4-ATR) for Cr(Ⅵ) are 86.16, -15.1 kJ/mol,and 339.8 J/mol·Κ,respectively.Coordination molar ratio of Cr(Ⅵ)to -NH-H???19920607??? is 1:1. The sorption mechanism shows that the nitrogen atoms of the functional group of 4-ATR coordinated with Cr(Ⅵ) to form coordination bond. The 4-ATR can be used in the separation of Cr(Ⅵ) from the waste electroplating water. The percentage of recovery of chromium is 95.7.%., Cr(Ⅵ) was quantitatively adsorbed by 4-amino-1,2,4-triazole resin(4-ATR) in a medium of pH=1,but Cr3+ almost could not be adsorbed. The separation coefficient βCr(Ⅵ)/Cr3+ is as high as 5.52×103. The statically saturated sorption capacity is 179.4mg Cr(Ⅵ)/gresin[3.45 mmol Cr(Ⅵ)/g resin]. Cr(Ⅵ) adsorbed on 4-ATR can be reductively eluated by 5mol/L HCL. The sorption rate constants determined under various temperatures were k21℃=1.59×1O-3S-1,k25℃=1.87×10-3S-1 and k30℃=2.2×10-3S-1,respectively. The apparent activation energy of sorption E2 is 26.26kJ/mol.The thermodynamic parameters of sorption,enthalpy ΔH298,freeenergy ΔG298,and entropy ΔS298 of sorption (4-ATR) for Cr(Ⅵ) are 86.16, -15.1 kJ/mol,and 339.8 J/mol·Κ,respectively.Coordination molar ratio of Cr(Ⅵ)to -NH-H
is 1:1. The sorption mechanism shows that the nitrogen atoms of the functional group of 4-ATR coordinated with Cr(Ⅵ) to form coordination bond. The 4-ATR can be used in the separation of Cr(Ⅵ) from the waste electroplating water. The percentage of recovery of chromium is 95.7.%., Cr(Ⅵ) was quantitatively adsorbed by 4-amino-1,2,4-triazole resin(4-ATR) in a medium of pH=1,but Cr3+ almost could not be adsorbed. The separation coefficient βCr(Ⅵ)/Cr3+ is as high as 5.52×103. The statically saturated sorption capacity is 179.4mg Cr(Ⅵ)/gresin[3.45 mmol Cr(Ⅵ)/g resin]. Cr(Ⅵ) adsorbed on 4-ATR can be reductively eluated by 5mol/L HCL. The sorption rate constants determined under various temperatures were k21℃=1.59×1O-3S-1,k25℃=1.87×10-3S-1 and k30℃=2.2×10-3S-1,respectively. The apparent activation energy of sorption E2 is 26.26kJ/mol.The thermodynamic parameters of sorption,enthalpy ΔH298,freeenergy ΔG298,and entropy ΔS298 of sorption (4-ATR) for Cr(Ⅵ) are 86.16, -15.1 kJ/mol,and 339.8 J/mol·Κ,respectively.Coordination molar ratio of Cr(Ⅵ)to -NH-H is 1:1. The sorption mechanism shows that the nitrogen atoms of the functional group of 4-ATR coordinated with Cr(Ⅵ) to form coordination bond. The 4-ATR can be used in the separation of Cr(Ⅵ) from the waste electroplating water. The percentage of recovery of chromium is 95.7.%.
1992, 9(6): 36-41
Abstract:
Based on the graph theory, a new topological index has been proposed and used in studying the physical and chemical properties of alkanes. It is concluded that this index bears a better stucture selectivity and relativity than other topological indexes.
Based on the graph theory, a new topological index has been proposed and used in studying the physical and chemical properties of alkanes. It is concluded that this index bears a better stucture selectivity and relativity than other topological indexes.
1992, 9(6): 42-45
Abstract:
The surface composition and structure of plasma treated polyvinylidene fluoride have been studied by XPS. Various O.N containing groups were found at the surface after plasma treatment.
The surface composition and structure of plasma treated polyvinylidene fluoride have been studied by XPS. Various O.N containing groups were found at the surface after plasma treatment.
1992, 9(6): 46-51
Abstract:
Poly(octadecyl methacrylate)(P(n-OMA)) was synthesized. The sequence distribution of its stereoregularity has been studied 13C NMR spectra of by carbonyl, methyl and quaternary carbons. The contents of various stereosequences were determined and the rusults were in agreement with that obtained from FTIR spectra.The number average sequence lengths were determined in terms of 13C NMR spectra of triad sequence. The results suggest that the polymerization of alkyl methacylate is characterized by Bernoullian statistics.
Poly(octadecyl methacrylate)(P(n-OMA)) was synthesized. The sequence distribution of its stereoregularity has been studied 13C NMR spectra of by carbonyl, methyl and quaternary carbons. The contents of various stereosequences were determined and the rusults were in agreement with that obtained from FTIR spectra.The number average sequence lengths were determined in terms of 13C NMR spectra of triad sequence. The results suggest that the polymerization of alkyl methacylate is characterized by Bernoullian statistics.
1992, 9(6): 52-56
Abstract:
Fourteen trialkyltin derivatives containing azotic heterocyelie compounds were synthesized. The IR, 1H, 119Sn and 29Si NMR, MS and elemental analysis were carried out. The results showed that trialkyltin-1,2,4-triazole is an organotin polymer containing fivecoordinated tin atom with bridging nitrogen atoms. The bioassay results showed that the biological effects of the compounds are mainly determined by the trialkyl groups linked with the tin atoms.
Fourteen trialkyltin derivatives containing azotic heterocyelie compounds were synthesized. The IR, 1H, 119Sn and 29Si NMR, MS and elemental analysis were carried out. The results showed that trialkyltin-1,2,4-triazole is an organotin polymer containing fivecoordinated tin atom with bridging nitrogen atoms. The bioassay results showed that the biological effects of the compounds are mainly determined by the trialkyl groups linked with the tin atoms.
1992, 9(6): 57-60
Abstract:
Five tetraplatinum (Ⅳ) analogue complexes were synthesized and characterized, The antitumour activity of the synthesized complexes against S-180 in mice and their water and ethylacetate solubilities were determined, The complex of ???19920612??? was found to have a higher activity, The relationship between the activity of the complexes and their water and ethylacetate solubilities, the mechanism of the action of Pt (Ⅳ)complexes were discussed., Five tetraplatinum (Ⅳ) analogue complexes were synthesized and characterized, The antitumour activity of the synthesized complexes against S-180 in mice and their water and ethylacetate solubilities were determined, The complex of was found to have a higher activity, The relationship between the activity of the complexes and their water and ethylacetate solubilities, the mechanism of the action of Pt (Ⅳ)complexes were discussed., Five tetraplatinum (Ⅳ) analogue complexes were synthesized and characterized, The antitumour activity of the synthesized complexes against S-180 in mice and their water and ethylacetate solubilities were determined, The complex of 
was found to have a higher activity, The relationship between the activity of the complexes and their water and ethylacetate solubilities, the mechanism of the action of Pt (Ⅳ)complexes were discussed.
Five tetraplatinum (Ⅳ) analogue complexes were synthesized and characterized, The antitumour activity of the synthesized complexes against S-180 in mice and their water and ethylacetate solubilities were determined, The complex of ???19920612??? was found to have a higher activity, The relationship between the activity of the complexes and their water and ethylacetate solubilities, the mechanism of the action of Pt (Ⅳ)complexes were discussed., Five tetraplatinum (Ⅳ) analogue complexes were synthesized and characterized, The antitumour activity of the synthesized complexes against S-180 in mice and their water and ethylacetate solubilities were determined, The complex of
was found to have a higher activity, The relationship between the activity of the complexes and their water and ethylacetate solubilities, the mechanism of the action of Pt (Ⅳ)complexes were discussed.
1992, 9(6): 61-63
Abstract:
The lauryl ester of carboxylated PPO with 16.0mol% of carboxylation (Lau-CPPO) can be used as a compatilizer for C-PPO/PS blend. The DSC results showed that when Lau-CPPO was more than 30wt%,the system became miscible.TEM microphotographs of C-PPO/PS/Et-CPPO blend showed that the interphase was blurred, the phase permeation was emehanced, and the phase size became smaller with the increase of Lau-CPPO in the blend.
The lauryl ester of carboxylated PPO with 16.0mol% of carboxylation (Lau-CPPO) can be used as a compatilizer for C-PPO/PS blend. The DSC results showed that when Lau-CPPO was more than 30wt%,the system became miscible.TEM microphotographs of C-PPO/PS/Et-CPPO blend showed that the interphase was blurred, the phase permeation was emehanced, and the phase size became smaller with the increase of Lau-CPPO in the blend.
1992, 9(6): 64-66
Abstract:
High quality EMD was prepared from a bath containing suspended MnO2. The method is capable of using current density up to l.3A/dm2 on titanium electrode with postponded passivation on Ti surface. EMD thus obtained had a specific surface of 79m2/g instead of 34m2/g for that obtained by commom method.
High quality EMD was prepared from a bath containing suspended MnO2. The method is capable of using current density up to l.3A/dm2 on titanium electrode with postponded passivation on Ti surface. EMD thus obtained had a specific surface of 79m2/g instead of 34m2/g for that obtained by commom method.
1992, 9(6): 67-70
Abstract:
The preparation and XPS characters of rare earth chloride complexes with oxidized glutathione(GSSG) have been studied.The results indicate that all the oxygen atoms in GSSG are coordinated and the conformation change of the ligand is very little in the complexes. The BE peaks of 3d5/2 and 3d3/2 of lanthanide ions in the complexes show the satellite peaks.The mechanism,intensity and shift of the satellite peaks are discussed.
The preparation and XPS characters of rare earth chloride complexes with oxidized glutathione(GSSG) have been studied.The results indicate that all the oxygen atoms in GSSG are coordinated and the conformation change of the ligand is very little in the complexes. The BE peaks of 3d5/2 and 3d3/2 of lanthanide ions in the complexes show the satellite peaks.The mechanism,intensity and shift of the satellite peaks are discussed.
1992, 9(6): 71-76
Abstract:
The method of fuzzy mathematies is used in elustering N,N'-disubstituted amides RCON(R')R" in terms of their behaviour in extraction of U(Ⅵ),Pu(Ⅳ) and HNO3. The fuzzy clustering results indicate that the extraetion behaviour of N,N'-disubstituted amides are determined by the substitutents R,R' and R" in amides,among these the role of R is more important.The study shows the feasibility of applying the fuzzy mathematies method to study the relationship between the structure and extraction behaviour of the extraetants.
The method of fuzzy mathematies is used in elustering N,N'-disubstituted amides RCON(R')R" in terms of their behaviour in extraction of U(Ⅵ),Pu(Ⅳ) and HNO3. The fuzzy clustering results indicate that the extraetion behaviour of N,N'-disubstituted amides are determined by the substitutents R,R' and R" in amides,among these the role of R is more important.The study shows the feasibility of applying the fuzzy mathematies method to study the relationship between the structure and extraction behaviour of the extraetants.
1992, 9(6): 77-80
Abstract:
The technique of feeding back current is applied to the reciprocal oseillographie chronopotentiometrie titration. Thus the capacity current can be greatly deducted and the sensibility of titration is enhanced If the feeding back current reciprocal oscillographic chronopotentiomerie curve is treated by differentiation, the sensibility of the titration will be sharply improved.
The technique of feeding back current is applied to the reciprocal oseillographie chronopotentiometrie titration. Thus the capacity current can be greatly deducted and the sensibility of titration is enhanced If the feeding back current reciprocal oscillographic chronopotentiomerie curve is treated by differentiation, the sensibility of the titration will be sharply improved.
1992, 9(6): 81-84
Abstract:
A series of polyester-polyester segmented copolymers were synthesized by condensation of hydroxy-terminated poly(ethylene adipate) and dimethyl phthalate or isophthalie aeid and ethylene glycol using manganese acetate, titanium dioxide and titanium-potassium oxalate as eatalysts. The copolymers were characterized by swolling test,molecular weight and NMR measurements. The relationship between dynamie mechanical properties, erystalinity and component of the segmented copolymers was investigated. The results show that the crystalinity of poly(ethylene phthalate) chains in segmented copolymer may be destroyed by the added isophthalic acid, which makes the segmented copolymer be a good damping material with tanδmax1.37).
A series of polyester-polyester segmented copolymers were synthesized by condensation of hydroxy-terminated poly(ethylene adipate) and dimethyl phthalate or isophthalie aeid and ethylene glycol using manganese acetate, titanium dioxide and titanium-potassium oxalate as eatalysts. The copolymers were characterized by swolling test,molecular weight and NMR measurements. The relationship between dynamie mechanical properties, erystalinity and component of the segmented copolymers was investigated. The results show that the crystalinity of poly(ethylene phthalate) chains in segmented copolymer may be destroyed by the added isophthalic acid, which makes the segmented copolymer be a good damping material with tanδmax1.37).
1992, 9(6): 85-88
Abstract:
Reactions of Pt (MeNH2)2(H2O)22+ with glycine,L-methionine, N-methyliminodiacetie acid and thiodiacetic acid were studied by pH potentiometry and 13C NMR spectroscopy.The complex formation constants (logK) were 8.55, 8.64,8.05 and 3.68, respectively, as determined by pH titration at 37℃. The possible structures of the formed complexes were briefly discussed.
Reactions of Pt (MeNH2)2(H2O)22+ with glycine,L-methionine, N-methyliminodiacetie acid and thiodiacetic acid were studied by pH potentiometry and 13C NMR spectroscopy.The complex formation constants (logK) were 8.55, 8.64,8.05 and 3.68, respectively, as determined by pH titration at 37℃. The possible structures of the formed complexes were briefly discussed.
1992, 9(6): 89-91
Abstract:
The sulfonated polyethylene hollow fiber ion-exchange membranes with different ionexchange capacity (IEC) were prepared by heterogeneous photochemical chlorosulfonation reaction. The effects of temperature and IEC on the pervaporation of a near azeotropic isopropanol/water feed mixture were studied.
The sulfonated polyethylene hollow fiber ion-exchange membranes with different ionexchange capacity (IEC) were prepared by heterogeneous photochemical chlorosulfonation reaction. The effects of temperature and IEC on the pervaporation of a near azeotropic isopropanol/water feed mixture were studied.
1992, 9(6): 92-94
Abstract:
Diphthalocyanine erbium complex has been proved to be of a sandwich structure by xray diffraction spectrum,and ultraviolet and infraed spectrophotometry. The volt-ampere curve and the risistivity-temperatrue curve under different atmosphere showed its activation energy(ΔE) was 0.278eV in vacuum and 0.274eV in oxygen. Under diffrent atmosphere, the resistivity is 1.16(H2), 1.14(vaeuum),1.03(N2), 0.88(air), 0.86(O2)ΜΩcm. It is showed that the conductive property of[Pc2Er]H is due to the extrinsic impurity conduction.
Diphthalocyanine erbium complex has been proved to be of a sandwich structure by xray diffraction spectrum,and ultraviolet and infraed spectrophotometry. The volt-ampere curve and the risistivity-temperatrue curve under different atmosphere showed its activation energy(ΔE) was 0.278eV in vacuum and 0.274eV in oxygen. Under diffrent atmosphere, the resistivity is 1.16(H2), 1.14(vaeuum),1.03(N2), 0.88(air), 0.86(O2)ΜΩcm. It is showed that the conductive property of[Pc2Er]H is due to the extrinsic impurity conduction.
1992, 9(6): 95-99
Abstract:
The technique of spin trapping and ESR method has been applied to study the reaction of superoxide radicals with pyrimidine bases and nucleoside in the presence of riboflavin and 2-methyl-2-nitrosopropane.The kinds of radicals produced were determined and the mechanism of the reaction was discussed. It is concluded that it is hydroxyl radicals rather than superoxide radicals that react with pyrimidine bases and nucleoside.
The technique of spin trapping and ESR method has been applied to study the reaction of superoxide radicals with pyrimidine bases and nucleoside in the presence of riboflavin and 2-methyl-2-nitrosopropane.The kinds of radicals produced were determined and the mechanism of the reaction was discussed. It is concluded that it is hydroxyl radicals rather than superoxide radicals that react with pyrimidine bases and nucleoside.
1992, 9(6): 100-102
Abstract:
The molecular sieve type CoAPO-44 has been synthesized hydrothermally using eyelohexylamine as a templet. It was characterized by X-ray diffractometry, SEM and EPEDA. Some properties, including thermal stability, adsorption property and catalytic property have been studied.
The molecular sieve type CoAPO-44 has been synthesized hydrothermally using eyelohexylamine as a templet. It was characterized by X-ray diffractometry, SEM and EPEDA. Some properties, including thermal stability, adsorption property and catalytic property have been studied.
1992, 9(6): 103-106
Abstract:
Twenty N,N'-diaryloxyacetylphenylenediamines have been synthesized by means of liquid-liquid phase transfer catalysis. The compositions and structures of the compounds have been characterized by elemental analysis, IR and H-NMR spectroscopy measurements. The plant growth promoting effects of some compounds were observed preliminarily.
Twenty N,N'-diaryloxyacetylphenylenediamines have been synthesized by means of liquid-liquid phase transfer catalysis. The compositions and structures of the compounds have been characterized by elemental analysis, IR and H-NMR spectroscopy measurements. The plant growth promoting effects of some compounds were observed preliminarily.
1992, 9(6): 107-109
Abstract:
Three η3-allyl-rare earth complexes were synthesized by reacting anhydrous lanthanide trichloride with CH2=C(CH3)-CH2MgCl at 1:2 molar ratio in tetrahydrofuran. The complexes with the general formula (η3-2-CH3-C3H4)2LnCl5Mg2(tmed)2(Ln=La, Ce, and Nd) were characterized by elemental analyses, IR spectra and MS. These complexes can polymerize styrene and isoprene, giving atactic polystyrene and equal binary polyisoprene respectively.
Three η3-allyl-rare earth complexes were synthesized by reacting anhydrous lanthanide trichloride with CH2=C(CH3)-CH2MgCl at 1:2 molar ratio in tetrahydrofuran. The complexes with the general formula (η3-2-CH3-C3H4)2LnCl5Mg2(tmed)2(Ln=La, Ce, and Nd) were characterized by elemental analyses, IR spectra and MS. These complexes can polymerize styrene and isoprene, giving atactic polystyrene and equal binary polyisoprene respectively.
1992, 9(6): 110-112
Abstract:
The mono-alkylation of 4,4'-biphenyldiol was carried out by PTC method and an improved Williamson reaction. The effects of reaction conditions on the yield of I were discussed., The mono-alkylation of 4,4'-biphenyldiol was carried out by PTC method and an improved Williamson reaction. The effects of reaction conditions on the yield of I were discussed.
The mono-alkylation of 4,4'-biphenyldiol was carried out by PTC method and an improved Williamson reaction. The effects of reaction conditions on the yield of I were discussed., The mono-alkylation of 4,4'-biphenyldiol was carried out by PTC method and an improved Williamson reaction. The effects of reaction conditions on the yield of I were discussed.
1992, 9(6): 113-116
Abstract:
The interaction between carboxymethyl hydroxyethyl cellulose and carboxymethyl hydroxypropyl cellulose and organie zirconium compounds has been investigated. A buffer system was developed to control the formation of gel. Experimental results show that both zirconium acetyl acetonate and zirconium lactatecan crosslink carboxyalkyl hydroxyalkyl cellulose successfully. The crosslinked product exhibits better heat-resistant stability.
The interaction between carboxymethyl hydroxyethyl cellulose and carboxymethyl hydroxypropyl cellulose and organie zirconium compounds has been investigated. A buffer system was developed to control the formation of gel. Experimental results show that both zirconium acetyl acetonate and zirconium lactatecan crosslink carboxyalkyl hydroxyalkyl cellulose successfully. The crosslinked product exhibits better heat-resistant stability.
1992, 9(6): 117-119
Abstract:
Nine new red azo dyes containing aromatic nitro group and maleic monoamide were synthesized which are capable of dyeing polyester and cotton fiber blends. Maleic monoamide substituent in the dyes makes the latter soluble in water.The dyed PET/cotton blends showed a certain grade of fastness.
Nine new red azo dyes containing aromatic nitro group and maleic monoamide were synthesized which are capable of dyeing polyester and cotton fiber blends. Maleic monoamide substituent in the dyes makes the latter soluble in water.The dyed PET/cotton blends showed a certain grade of fastness.
1992, 9(6): 120-122
Abstract:
Rheological properties and morphology of chlorinated poly (vinyl chloride)/epoxide resin (CPVC/EP) blends were studied.The results show that the variation of shear viscosity with shcar rate for all blends can be described accurately by a second order equation. The flow activation energy of the blends decreases with the shear rate and increases with the EP content at constant shear rate.The logarithmic viscosity decreases linearly with the EP content when EP is less than 15 wt%. CPVC and EP form layer structure in the blend.
Rheological properties and morphology of chlorinated poly (vinyl chloride)/epoxide resin (CPVC/EP) blends were studied.The results show that the variation of shear viscosity with shcar rate for all blends can be described accurately by a second order equation. The flow activation energy of the blends decreases with the shear rate and increases with the EP content at constant shear rate.The logarithmic viscosity decreases linearly with the EP content when EP is less than 15 wt%. CPVC and EP form layer structure in the blend.
1992, 9(6): 123-126
Abstract:
Fourteen mixed ligand complexes of rare earth(Ⅲ)(except Ce,Pm)with 1-phenyl-3-methyl-4-(α-furoyl)-pyrazolone-5(HPMαFP) and 2,2'-dipyridine (Dpy) have been synthesized. According to elemental analysis,the complexes have composition of RE (PMαFP)3Dpy.The structures and properties of these complexes were studied by IR, 1H NMR, thermal analysis and x-ray diffraction.
Fourteen mixed ligand complexes of rare earth(Ⅲ)(except Ce,Pm)with 1-phenyl-3-methyl-4-(α-furoyl)-pyrazolone-5(HPMαFP) and 2,2'-dipyridine (Dpy) have been synthesized. According to elemental analysis,the complexes have composition of RE (PMαFP)3Dpy.The structures and properties of these complexes were studied by IR, 1H NMR, thermal analysis and x-ray diffraction.
