Considerations concerning the glass temperature of blends of miscible polymers

被引：13
|
作者：
Schneider, HA
机构：
[1] Inst Makromol Chem, D-79104 Freiburg, Germany
[2] Freiburger Mat Forschungszentrum, D-79104 Freiburg, Germany
来源：
POLYMER BULLETIN | 1998年 / 40卷 / 2-3期
关键词：
D O I：
10.1007/s002890050258
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
It is shown that experimental Tg vs. composition data of miscible polymer blends can be adapted by a third order Tg vs. composition equation characterized by two parameters, K-1 and K-2, which result in the supposition that besides the thermodynamically claimed favourable energetic hetero-interaction, contributions of conformational mixing entropy are responsible for miscibility. K-1 comprises mainly energetic interaction effects, whereas K-2 is due to effects of the conformational mixing entropy. It further results surprisingly that K-1 is roughly correlated with the difference of the solubility parameters of the blend components. At the moment no explanation can be offered for this observation.
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页码：321 / 328
页数：8
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