MICROSTRUCTURE OF BULK CRYSTALLIZED LINEAR POLYETHYLENE - CORRELATION OF MICROHARDNESS AND YIELD STRESS

被引：38

作者：

CALLEJA, FJB ^{[1
]}

GIRI, L ^{[1
]}

WARD, IM ^{[1
]}

CANSFIELD, DLM ^{[1
]}

机构：

[1] UNIV LEEDS,IRC POLYMER SCI & TECHNOL,LEEDS LS2 9JT,W YORKSHIRE,ENGLAND

来源：

JOURNAL OF MATERIALS SCIENCE | 1995年 / 30卷 / 05期

关键词：

D O I：

10.1007/BF00356111

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of molecular weight on the yield behaviour and microhardness of melt-crystallized polyethylene has been studied. The influence of the crystallization conditions on the mechanical properties has been examined. It is shown that Tabor's relationship between microhardness and yield stress applies if the strain rate of the tensile tests is comparable to that employed in the hardness indentation tests. Results are discussed in terms of surface free energy which depends on the number of molecular entanglements segregated on to the surface of the lamellar crystals controlling the yield behaviour of the polymer.

引用

页码：1139 / 1143

页数：5

共 20 条

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