A NOVEL HEAT-RESISTANT BLEND PRODUCED BY COMPOSITIONAL QUENCHING - A THERMOPLASTIC POLYIMIDE IMPACT-MODIFIED WITH A FLUOROELASTOMER

被引：5

作者：

FURNO, JS ^{[1
]}

NAUMAN, EB ^{[1
]}

机构：

[1] RENSSELAER POLYTECH INST,DEPT CHEM ENGN,TROY,NY 12180

来源：

POLYMER | 1991年 / 32卷 / 01期

关键词：

POLY(IMIDE ETHER); FLUOROELASTOMER; IMPACT-MODIFIED; COMPOSITIONAL QUENCHING;

D O I：

10.1016/0032-3861(91)90567-3

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 novel high-temperature blend consisting of a microdispersion of the fluoroelastomer Viton A in an Ultem poly(ether imide) matrix has been produced through the process of compositional quenching. Submicrometre spherical particles of the elastomer were formed within the poly(ether imide) matrix through the process. It has been found that the addition of Viton to Ultem significantly improves impact strength with little sacrifice in tensile properties and thermal stability. This improvement in impact strength becomes even more dramatic at elevated temperatures. These impact strength improvements are attributed to the rubber particle's ability to activate shear yielding deformation in a larger volume of the matrix material near the tip of a propagating crack. This deformation absorbs energy during fracture and results in higher impact strengths. Blends of Ultem and Viton produced by extrusion and precipitation processes were found to have problems that were not observed in any of the compositionally quenched materials.

引用

页码：88 / 94

页数：7

共 10 条

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[3]

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