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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-PROPYLENE COPOLYMER BLENDS .2.
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STRUCTURE AND PROPERTIES OF DRAWN TAPES OF HIGH-DENSITY POLYETHYLENE/ETHYLENE-PROPYLENE COPOLYMER BLENDS .2.

机译：高密度聚乙烯/乙烯-丙烯共聚物共混料的拉丝结构和性能2。

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摘要

A series of oriented tapes has been prepared from the blends consisting of high-density polyethylene (HDPE), with isotactic polypropylene (PP) and ethylene-propylene block copolymer (EP(b)C). The mechanical properties and structure-morphology of blends were investigated using differential scanning calorimetry, polarizing microscopy, wide- and small-angle X-ray diffraction, and dynamic viscoelastometer. It is observed that blends are incompatible in the 20-80% blend composition range. The two p-relaxation peaks each of PE and PP component appear in the dynamic spectra of these blends. The two peaks, however, merge into a very broad, single relaxation peak at lower blend compositions (9 and 18% blends), indicating reasonably good compatibility between the two blend components. Variation of PP and EP(b)C content in blends with HDPE affects the melting and crystallization temperature, crystallinity, crystallite dimensions, and crystallite and amorphous phase orientation of blend components, which, in turn, affect the mechanical properties of drawn tapes. (C) 1996 John Wiley & Sons, Inc. [References: 41]
机译：由高密度聚乙烯（HDPE），全同立构聚丙烯（PP）和乙烯-丙烯嵌段共聚物（EP（b）C）组成的共混物已制备了一系列取向胶带。使用差示扫描量热法，偏光显微镜，广角和小角X射线衍射以及动态粘弹性仪研究了共混物的机械性能和结构形态。观察到共混物在20-80％的共混物组成范围内是不相容的。 PE和PP组分各自的两个p松弛峰出现在这些共混物的动态光谱中。但是，这两个峰在较低的共混物组成（9％和18％的共混物）处合并成一个非常宽的单个弛豫峰，表明这两个共混物组分之间的相容性相当好。 HDPE共混物中PP和EP（b）C含量的变化会影响共混组分的熔融和结晶温度，结晶度，微晶尺寸以及微晶和非晶相取向，进而影响拉伸带的机械性能。 （C）1996 John Wiley＆Sons，Inc. [参考：41]

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