PHYSICAL AND CHEMICAL CROSS-LINKING EFFECTS IN POLYURETHANE ELASTOMERS

被引：75

作者：

KONTOU, E ^{[1
]}

SPATHIS, G ^{[1
]}

NIAOUNAKIS, M ^{[1
]}

KEFALAS, V ^{[1
]}

机构：

[1] NATL TECH UNIV ATHENS,DEPT THEORET & APPL MECH,5 HEROES POLYTECHNION AVE,GR-15773 ATHENS,GREECE

来源：

COLLOID AND POLYMER SCIENCE | 1990年 / 268卷 / 07期

关键词：

cross-linking; chemical and physical; IR-spectroscopy; Polyurethane-block-copolymers; stress-strain-measurements; tensile retraction;

D O I：

10.1007/BF01410405

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A series of polyester-urethane block copolymers of various molecular weights was prepared via a two-step polymerization process. The prepolymer composition was kept constant in all the samples, while the NCO/OH ratio during the chain extension was varied from 0.9 to 1.2. Chemical and physical cross-linking effects were studied by means of F.T.I.R spectroscopy, swelling, and elastic behavior. Equilibrium stress-strain measurements and tensile-retraction tests were carried out to examine the elastomeric behavior of the materials tested. The extent of agreement between microscopic and macroscopic behavior was then evaluated. © 1990 Steinkopff.

引用

页码：636 / 644

页数：9

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