Conformation and structural relaxation of partially disentangled poly(vinyl chloride) prepared by freeze-extracting dilute solutions

被引：28

作者：

Chen, JL

Xue, G

Li, YH

Wang, L

Tian, GH

机构：

[1] Nanjing Univ, Dept Chem, State Key Lab Functional Polymer Mat Adsorpt & Se, Nanjing 210093, Peoples R China

[2] Shanghai Jiao Tong Univ, Inst Chem Engn, Shanghai 200240, Peoples R China

来源：

MACROMOLECULES | 2001年 / 34卷 / 05期

关键词：

D O I：

10.1021/ma001388l

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The partially disentangled poly(vinyl chloride) (PVC) samples were prepared by freeze-extracting from dilute PVC/THF solutions. The conformation of these samples was investigated by infrared and Raman spectroscopy. The structural relaxation behaviors were studied by differential scanning calorimeter (DSC). The results showed that the PVC samples prepared from dilute solutions with concentrations lower than 0.25% were in the expanded state with fewer entanglements. The conformation and structural relaxation of PVC depended strongly on the entanglements in polymers, and the structural relaxation rate increased with decreasing chain entanglements, which is in good agreement with the modeling predictions.

引用

页码：1297 / 1301

页数：5

共 30 条

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