Specific features of the structural state and segmental dynamics in miscible polystyrene-poly(α-methyl styrene) blends

被引：0
|
作者：
Bershtein, VA [1 ]
Egorova, LM [1 ]
Ryzhov, VA [1 ]
机构：
[1] Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia
来源：
VYSOKOMOLEKULYARNYE SOEDINENIYA SERIYA A & SERIYA B | 1997年 / 39卷 / 10期
关键词：
D O I：
暂无
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 structural stare and segmental dynamics in amorphous miscible blends of polystyrene and poly(alpha-methyl styrene) were studied by DSC and mid- and far-IR spectroscopy (25-1700 cm(-1)). Considerable nonadditivity of the blend spectrum and some specific features of segmental dynamics, in particular, two sharply decreased glass transition temperatures in single-phase blends and two- or threefold reduction of the activation parameters of segmental motion, were disclosed, These effects were interpreted, and they can be predicted based on the concept of a common segmental nature of alpha- and beta-relaxations in chain-flexible polymers.
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收藏
页码：1649 / 1658
页数：10
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