引用本文:
贺智端, 阮梅娜, 张宣琪, 王小兵, 金晓明, 黄家贤, 李春荣, 王林富. 环型聚苯乙烯的表征[J]. 应用化学,
1986, 3(1): 24-29.
Citation: He Zhiduan, Ruan Meina, Zhang Xuanqi, Wang Xiaobing, Jin Xiaoming, Huang Jiaxian, Li Chunrong, Wang Linfu. CHARACTERIZATION OF RING-SHAPED POLYSTYRENE[J]. Chinese Journal of Applied Chemistry, 1986, 3(1): 24-29.
Citation: He Zhiduan, Ruan Meina, Zhang Xuanqi, Wang Xiaobing, Jin Xiaoming, Huang Jiaxian, Li Chunrong, Wang Linfu. CHARACTERIZATION OF RING-SHAPED POLYSTYRENE[J]. Chinese Journal of Applied Chemistry, 1986, 3(1): 24-29.
环型聚苯乙烯的表征
摘要:
用GPC-LALLS等方法对环型聚苯乙烯进行了系统的表征。环型聚苯乙烯(RPS)是由两端具有活性基团的线型聚苯乙烯通过环化反应制备的,分子量由3×104至2.7×105。结果表明在θ溶剂和良溶剂中RPS与线型聚苯乙烯(LPS)特性粘数之比g(=[η]r/[η]1)分别约为0.63和0.65;RPS与LPS无扰均方回转半径之比(2>or/2>ol)为0.55-0.59,两者都与大环的理论值相近。实验结果还表明环型高分子符合GPC普适标定原理,此外,求出了RPS在环已烷,甲苯和四氢呋喃溶液中的粘度-分子量方程。
English
CHARACTERIZATION OF RING-SHAPED POLYSTYRENE
Abstract:
Ring-shaped polystyrene (RPS) was prepared through cyclization reaction of linear polystyrene with active end groups. Systematical characterization of RPS fractions was carried out by GPC-low angle laser light scattering spectroscopy and other methods. The mean value of the ratio g(=[η]r/[η]1) is 0.63 in θ solvent and~0.65 in good solvents. The ratio of unperturbed mean square radius of gyration between ring and linear polystyrene (1>or/2>ol) is 0.55-0.59. They are both coincide with theoretical values for macro rings. It is found that RPS complys with universal calibration cuvve of GPC and has smaller hydrodynamic volume than linear polystyrene. Parameters of Mark-Houwink equations of RPS in cyclohexane 34.5℃,toluene 25℃ and tetrahydrofuran 30℃ have been obtained as K equals to 5.0, 0.683 and 1.2×10-2;α equals to 0.5, 0.734 and 0.68 respectively.
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