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首页> 外文期刊>Journal of Applied Polymer Science >STRUCTURE-MORPHOLOGY AND TEAR STRENGTH OF ORIENTED TAPES OF POLYETHYLENE AND ITS BLENDS .3.
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STRUCTURE-MORPHOLOGY AND TEAR STRENGTH OF ORIENTED TAPES OF POLYETHYLENE AND ITS BLENDS .3.

机译：聚乙烯及其共混物的定向形态的结构形态和抗拉强度.3。

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摘要

The tear energy (G(c)) of high-density polyethylene (HDPE) and HDPE/ethylene copolymer blended drawn tapes in orientation direction has been studied systematically with respect to structural parameters. In all cases the values of G(c) were in the range of 0.8-8.0 kJ m(-2). The results showed a direct relationship between amorphous phase orientation and G(c) of drawn tapes. The decrease in G(c) with molecular orientation of tapes is due to the formation of large number of elongated voids at the interfibrillar regions and diminution of viscous flow occuring in the vicinity of the propagating crack tip. An increase in G(c) in the range of 15-45% was obtained for HDPE blended tapes containing about 10% of the second-blend component either as ethylene-vinyl acetate or ethylene propylene-diene terpolymer or ethylene-propylene block copolymer. This relates to the increase in fraction of amorphous phase and extensive molecular network in the interfibrillar amorphous regions. (C) 1996 John Wiley & Sons, Inc. [References: 38]
机译：针对结构参数，系统地研究了高密度聚乙烯（HDPE）和HDPE /乙烯共聚物共混拉伸带在取向方向上的撕裂能（G（c））。在所有情况下，G（c）的值都在0.8-8.0 kJ m（-2）的范围内。结果表明，非晶相取向与拉伸带的G（c）有直接关系。带的分子取向引起的G（c）的减少是由于在原纤维间区域形成了大量的细长空隙，并且在扩展的裂纹尖端附近出现了粘性流动的减少。对于含有约10％的第二共混物组分的乙烯-乙酸乙烯酯或乙烯-丙烯-二烯三元共聚物或乙烯-丙烯嵌段共聚物的HDPE共混带，G（c）增加了15-45％。这涉及在原纤维间非晶区域中非晶相的分数的增加和广泛的分子网络。 （C）1996 John Wiley＆Sons，Inc. [参考：38]

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