Miscibility of syndiotactic polystyrene/atactic polystyrene blends by crystallization kinetics and enthalpy relaxation

被引：42

作者：

Hong, BK

Jo, WH ^{[1
]}

Kim, J

机构：

[1] Seoul Natl Univ, Dept Fiber & Polymer Sci, Seoul 151742, South Korea

[2] Korea Inst Sci & Technol, Div Polymer, Seoul 130650, South Korea

来源：

POLYMER | 1998年 / 39卷 / 16期

关键词：

syndiotactic polystyrene atactic polystyrene blends; crystallization kinetics; enthalpy relaxation;

D O I：

10.1016/S0032-3861(97)10314-7

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 miscibility of syndiotactic polystyrene (sPS)/atactic polystyrene (aPS) blends, whose constituent polymers have close T(g)s was investigated by crystallization kinetics and enthalpy relaxation. It was observed from crystallization kinetics experiment that both the spherulite growth rate and the overall crystallization rate of sPS in blends decrease with an increasing amount of aPS, indicating that sPS is diluted with aPS. When enthalpy relaxations of the blends are examined, it is revealed that the enthalpy recovery of sPS/aPS blends shows a single peak whose relaxation time is intermediate between those of sPS and aPS, and that the relaxation time of the blends gradually increases with the amount of aPS. From these results, it is concluded that sPS/aPS blends are completely miscible over the entire composition. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：3753 / 3757

页数：5

共 38 条

[11] PHYSICAL AGING STUDIES IN POLYMER BLENDS .2. ENTHALPY RELAXATION AS A FUNCTION OF AGING TEMPERATURE IN A POLYVINYL METHYL ETHER POLYSTYRENE BLEND [J].