TOUGHENING MECHANISM OF RUBBER-MODIFIED POLYAMIDES

被引：196

作者：

MURATOGLU, OK

ARGON, AS

COHEN, RE

WEINBERG, M

机构：

[1] MIT,DEPT CHEM ENGN,CAMBRIDGE,MA 02139

[2] MIT,PROGRAM POLYMER SCI & TECHNOL,CAMBRIDGE,MA 02139

[3] MIT,DEPT MAT SCI & ENGN,CAMBRIDGE,MA 02139

来源：

POLYMER | 1995年 / 36卷 / 05期

基金：

美国国家科学基金会;

关键词：

RUBBER-MODIFIED POLYAMIDES; TOUGHENING MECHANISM; DEFORMATION;

D O I：

10.1016/0032-3861(95)93590-I

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Rubber-modified polyamides were probed using scanning electron microscopy (SEM), transmission electron microscopy (TEM), small-angle X-ray scattering and various mechanical tests. TEM studies showed that in tough samples the crystalline orientation in the interparticle region is of a distinctly different character. The lamellae are organized perpendicular to the rubber-matrix interface, while the hydrogen-bonded planes of low slip resistance are aligned parallel to these interfaces. Based on this observation a model is proposed to elucidate the deformation and toughening mechanisms of these materials. Further SEM studies in the stress-whitened regions of both the tensile bars and Izod specimens revealed the evolution of a cavitation process in the rubber particles. The shape and the size of the cavities in tough samples is related to the initial morphology of the matrix.

引用

页码：921 / 930

页数：10

共 18 条

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