A NEW MECHANISM OF TOUGHENING GLASSY-POLYMERS .2. THEORETICAL APPROACH

被引：32
|
作者：
ARGON, AS
COHEN, RE
GEBIZLIOGLU, OS
BROWN, HR
KRAMER, EJ
机构：
[1] IBM CORP,ALMADEN RES CTR,SAN JOSE,CA 95120
[2] CORNELL UNIV,ITHACA,NY 14853
来源：
MACROMOLECULES | 1990年 / 23卷 / 17期
关键词：
Glass; Polymeric;
D O I：
10.1021/ma00219a019
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A theoretical model is presented for the toughening of brittle glassy polymers by the controlled solvent crazing action of precipitated low molecular weight rubber diluents existing in the form of randomly dispersed small spherical pools. In this mechanism the central process is the increased sorption of the diluent under the deformation-induced negative pressure existing in a boundary layer on the craze periphery where the sorbed diluent produces substantial plasticization that significantly lowers the craze flow stress to prevent premature craze fracture. The resulting expressions for the reduction of the craze flow stress with increasing volume fraction of diluent are in excellent agreement with experimental measurements. © 1990, American Chemical Society. All rights reserved.
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页码：3975 / 3982
页数：8
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