FUSION ENTHALPY AND ENTROPY OF SYNDIOTACTIC POLYSTYRENE

被引：41
|
作者：
GIANOTTI, G [1 ]
VALVASSORI, A [1 ]
机构：
[1] POLITECN MILAN,DEPT CHIM IND & INGN CHIM,I-20133 MILAN,ITALY
来源：
POLYMER | 1990年 / 31卷 / 03期
关键词：
crystallization; polymorphic modifications; polystyrene;
D O I：
10.1016/0032-3861(90)90387-E
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 fusion enthalpy and entropy of a highly syndiotactic polystyrene sample were determined by melting point depression in the presence of diluents. Three solvents were used to ascertain the presence, if any, of polymorphic modifications: dioctyl phthalate, diphenylsulphone and diphenyldiketone (benzil). The results were compared with those of the corresponding isotactic stereoisomer. Comparative observations were also made about crystallinity degree and crystallization rate of the two polymers. © 1990.
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收藏
页码：473 / 475
页数：3
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