Viscoelastic processes in vinyl alcohol-ethylene copolymers.: Influence of composition and thermal treatment

被引：30

作者：

Cerrada, ML ^{[1
]}

Pereña, JM ^{[1
]}

Benavente, R ^{[1
]}

Pérez, E ^{[1
]}

机构：

[1] CSIC, Inst Ciencia & Tecnol Polimeros, Madrid 28006, Spain

来源：

POLYMER | 2000年 / 41卷 / 17期

关键词：

vinyl alcohol-ethylene copolymers; dynamic mechanical analysis; thermal treatment;

D O I：

10.1016/S0032-3861(99)00868-X

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Viscoelastic relaxations of three samples of vinyl alcohol-ethylene copolymers, richer in the former comonomer, were studied in a wide range of temperature. The temperature location, intensity and apparent activation energy of the distinct relaxations found are discussed and compared with those of the homopolymers, poly(vinyl alcohol) and polyethylene. Differential scanning calorimetry and X-ray diffraction results of the specimens are also discussed in the frame of the dynamic mechanical analysis, showing that the polymorphism exhibited in some copolymers is a result of the thermal treatment. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：6655 / 6661

页数：7

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