引用本文:
Wei Hu Li, Xing Yuan Zhang, Jia Bing Dai. Synthesis and characterization of a novel hydroxypolyether blocked polydimethylsiloxane PEO-b-PDMS-b-PEO[J]. Chinese Chemical Letters,
2008, 19(10): 1209-1211.
doi:
10.1016/j.cclet.2008.07.021
Citation: Wei Hu Li, Xing Yuan Zhang, Jia Bing Dai. Synthesis and characterization of a novel hydroxypolyether blocked polydimethylsiloxane PEO-b-PDMS-b-PEO[J]. Chinese Chemical Letters, 2008, 19(10): 1209-1211. doi: 10.1016/j.cclet.2008.07.021
Citation: Wei Hu Li, Xing Yuan Zhang, Jia Bing Dai. Synthesis and characterization of a novel hydroxypolyether blocked polydimethylsiloxane PEO-b-PDMS-b-PEO[J]. Chinese Chemical Letters, 2008, 19(10): 1209-1211. doi: 10.1016/j.cclet.2008.07.021
Synthesis and characterization of a novel hydroxypolyether blocked polydimethylsiloxane PEO-b-PDMS-b-PEO
摘要:
A novel hydroxypolyether blocked polydimethylsiloxane,poly(ethylene oxide) propyl-b-polydimethylsiloxane-b-propyl poly(ethylene oxide)(PEO-b-PDMS-b-PEO)was synthesized by simple hydrosilation reaction of poly(ethylene glycol) monoallyl ether with α,ω-dihydrogen terminated PDMS(HPDMS).Fourier transform infrared spectroscopy(FTIR) and 1H NMR were used to identify the structure of PEO-b-PDMS-b-PEO and intermediate product HPDMS.Based on the effect investigations of temperature.reactant molar ratio,catalyst and time on the hydrosilation,it Was found that the conversion of Si-H bond to Si-C bond increased with the increase of catalyst and time,and the reaction completed when the content of catalyst Was 22 μg/g and the time Was 5 h,respectively.Urethane reaction of OH and NCO group confirms that PEO-b-PDMS-b-PEO is more reactive toward to diisocyanate than α,ω-dihydroxylbutyl terminated PDMS.
English
Synthesis and characterization of a novel hydroxypolyether blocked polydimethylsiloxane PEO-b-PDMS-b-PEO
Abstract:
A novel hydroxypolyether blocked polydimethylsiloxane,poly(ethylene oxide) propyl-b-polydimethylsiloxane-b-propyl poly(ethylene oxide)(PEO-b-PDMS-b-PEO)was synthesized by simple hydrosilation reaction of poly(ethylene glycol) monoallyl ether with α,ω-dihydrogen terminated PDMS(HPDMS).Fourier transform infrared spectroscopy(FTIR) and 1H NMR were used to identify the structure of PEO-b-PDMS-b-PEO and intermediate product HPDMS.Based on the effect investigations of temperature.reactant molar ratio,catalyst and time on the hydrosilation,it Was found that the conversion of Si-H bond to Si-C bond increased with the increase of catalyst and time,and the reaction completed when the content of catalyst Was 22 μg/g and the time Was 5 h,respectively.Urethane reaction of OH and NCO group confirms that PEO-b-PDMS-b-PEO is more reactive toward to diisocyanate than α,ω-dihydroxylbutyl terminated PDMS.
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Key words:
- Synthesis
- / Polydimethylsiloxane
- / Hydrosilation reaction
- / Reactivity
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