Effect of storage on the mechanical properties of propylene-ethylene copolymers

被引：0
|
作者：
Feng, Y [1 ]
Jin, X [1 ]
机构：
[1] Univ Waterloo, Dept Chem, Waterloo, ON N2L 3G1, Canada
来源：
JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY | 1998年 / A35卷 / 02期
关键词：
propylene-ethylene copolymers; mechanical properties; storage; secondary crystallization;
D O I：
10.1080/10601329808001979
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 effect of storage at room temperature on the mechanical properties of the low ethylene content propylene-ethylene copolymers was investigated. The experimental results showed that the storage modulus increased and the loss tangent decreased on storage. The glass transition temperature shifted to higher temperature compared to unstored samples. From the tensile results, it was seen that storage produced a stiffer and more brittle material. The stress relaxation behavior was investigated. It is suggested that all the effects resulted from the occurring of secondary crystallization during the storage process.
引用
收藏
页码：305 / 318
页数：14
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