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首页> 外文期刊>Journal of Applied Polymer Science >MORPHOLOGY AND TEXTURE OF HIGH-DENSITY POLYETHYLENE-POLYSTYRENE BLENDS DEFORMED BY PLANE-STRAIN COMPRESSION
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MORPHOLOGY AND TEXTURE OF HIGH-DENSITY POLYETHYLENE-POLYSTYRENE BLENDS DEFORMED BY PLANE-STRAIN COMPRESSION

机译：平面应变压缩变形的高密度聚乙烯-聚酯共混物的形貌和织构

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The blends of high-density polyethylene (HDPE) with atactic polystyrene (PS) were deformed plastically by plane-strain compression in a channel die. The samples were deformed up to the true strain 1.8 (compression ratio 6) in three temperature regimes: below, near, and above the glass transition temperature of polystyrene component. The morphology and the texture of crystalline component in the deformed blend samples were investigated by means of scanning electron microscopy and wide angle X-ray diffraction (pole figures technique). It was found that the deformation process in the blend of immiscible HDPE and PS does not differ markedly from the deformation of the one-component system from the point of view of the deformation mechanisms involved. The crystalline textures of the blend samples are qualitatively the same as in the plain HDPE deformed under similar conditions. The active deformation mechanisms are the same in deformation of both the plain HDPE and HDPE/PS blend, The mechanism identified are crystallographic slips: (100)[001], (100)[010], and (010[001] supported by the interlamellar slip. The presence of PS in blends modifies to some extent the deformation process and resulting orientation of the crystalline component, of HDPE by modification of the stress distribution within HDPE matrix around PS inclusions. This influence is much stronger at low deformation temperatures, when PS is in a glassy state, than at temperatures above T-g of PS. (C) 1996 John Wiley & Sons, Inc. [References: 11]
机译：高密度聚乙烯（HDPE）与无规立构聚苯乙烯（PS）的共混物在槽模中通过平面应变压缩塑性变形。样品在以下三个温度范围内变形至真实应变1.8（压缩比6）：聚苯乙烯组分的玻璃化转变温度以下，附近和之上。通过扫描电子显微镜和广角X射线衍射（极图技术）研究了变形共混物样品中晶体成分的形态和织构。从所涉及的变形机理的角度，发现不溶混的HDPE和PS的共混物中的变形过程与单组分系统的变形没有显着不同。共混物样品的晶体质地定性与在相似条件下变形的普通HDPE相同。普通HDPE和HDPE / PS共混物的变形主动变形机制相同，所识别的机制为晶体滑移：（100）[001]，（100）[010]和（010]共混物中PS的存在通过改变PS夹杂物周围HDPE基质内的应力分布，在一定程度上改变了HDPE的结晶过程，并在一定程度上改变了HDPE结晶组分的取向。 PS处于玻璃态，温度高于PS Tg（C）1996 John Wiley＆Sons，Inc. [参考文献：11]

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