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THERMAL-ANALYSIS OF POLY(VINYL FLUORIDE)
被引:4
|作者:
HANES, MD
LANDO, JB
机构:
[1] CASE WESTERN RESERVE UNIV,DEPT MACROMOLEC SCI,CLEVELAND,OH 44106
[2] PHILLIPS PETR CO,RES & DEV,BARTLESVILLE,OK 74004
关键词:
D O I:
10.1002/app.1993.070490711
中图分类号:
O63 [高分子化学(高聚物)];
学科分类号:
070305 ;
080501 ;
081704 ;
摘要:
A sub-T(m) transition at approximately 50-degrees-C in poly(vinyl fluoride) has been attributed to a number of physical factors. We have studied this effect using differential scanning calorimetry. The rate dependence of the endothermic peak at approximately 50-degrees-C indicates that it is a second order transition. However, the recovery behavior is time dependent. It is observed in perfect head-to-tail, perfectly linear polymer and thus is not a consequence of head-to-head or tail-to-tail defects or branch points. The transition appears to be a time dependent rearrangement of the polymer chains. (C) 1993 John Wiley & Sons, Inc.
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页码:1223 / 1232
页数:10
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