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首页> 外文期刊>Journal of Applied Polymer Science >STRUCTURE AND PROPERTIES OF DRAWN TAPES OF HIGH-DENSITY POLYETHYLENE/ETHYLENE COPOLYMER BLENDS .1.
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STRUCTURE AND PROPERTIES OF DRAWN TAPES OF HIGH-DENSITY POLYETHYLENE/ETHYLENE COPOLYMER BLENDS .1.

机译：高密度聚乙烯/乙烯共聚物共混物的拉丝结构和性能1。

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摘要

A series of undrawn and drawn tapes has been prepared from HDPE, as well as, blends consisting of 90% HDPE and 10% ethylene copolymers. The influence of both the molecular irregularity of ethylene copolymers and resultant crystallization behavior on structure and mechanical properties of these blends has been investigated using differential scanning calorimetry, wide- and small-angle X-ray diffraction, mechanical response at small and large strains, and dynamic mechanical thermal analysis. The tensile drawing study of undrawn tapes shows enhanced strain hardening and a consistent reduction in natural, as well as, maximum achievable draw ratio with an increase in molecular irregularity of ethylene copolymers. It has been confirmed that blends are partially miscible in the amorphous, as well as, in the crystalline phase through cocrystallization. The lateral crystallite thicknesses, crystallinity, and amorphous phase orientation of blends consistently decreases with an increase in molecular irregularity of ethylene copolymers because of a large-scale change in crystallization and drawing behavior of HDPE component in the blends. There is a distinct possibility that the molecular network exerts an important influence on physical and mechanical properties of undrawn and drawn tapes. (C) 1996 John Wiley & Sons, Inc. [References: 37]
机译：已从HDPE以及由90％HDPE和10％乙烯共聚物组成的混合物中制备了一系列未拉伸和拉伸的带材。乙烯共聚物的分子不规则性和所得结晶行为对这些共混物的结构和机械性能的影响已使用差示扫描量热法，宽和小角度X射线衍射，在大和小应变下的机械响应和动态机械热分析。未拉伸带材的拉伸拉伸研究表明，随着乙烯共聚物分子不规则性的增加，应变硬化得到增强，自然以及始终可实现的最大拉伸比降低。已经证实，通过共结晶，共混物在无定形以及在结晶相中是部分可混溶的。共混物的横向微晶厚度，结晶度和无定形相取向随着乙烯共聚物分子不规则性的增加而持续降低，因为共混物中HDPE组分的结晶和拉伸行为发生了大规模变化。分子网络极有可能对未拉伸和拉伸带的物理和机械性能产生重要影响。 （C）1996 John Wiley＆Sons，Inc. [参考：37]

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