Influence of the prehistory on the structure and properties of segmented urethane-urea block copolymers

被引：0
|
作者：
Letunovskii, M.P. [1 ]
Kitukhina, G.S. [1 ]
Zharkov, V.V. [1 ]
Kryuchkov, F.A. [1 ]
机构：
[1] All-Union Synthetic Resin Research, Inst
来源：
Polymer science USSR | 1988年 / 30卷 / 02期
关键词：
Copolymers--Deformation;
D O I：
10.1016/0032-3950(88)90114-1
中图分类号：
学科分类号：
摘要：
The aim of this work is to make a combined study of the influence of the prehistory on the structure, temperature transitions and deformation-strength behaviour of the urethane-urea block copolymers based on non-symmetrical 2,4-toluyelene diisocyanate (TDI). From an analysis of the results of X-ray study, thermomechanical investigations, IR spectroscopy and also the deformation-strength behaviour of segmented urethane-urea block copolymers, it has been established that because of kinetic restrictions the microheterogeneous structure of these polymers obtained from solution is non-equilibrium and is capable of perfectioning under the influence of additional treatment (heating, limited swelling in a number of low molecular weight liquids.
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页码：243 / 251
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