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首页> 外文期刊>Journal of Applied Polymer Science >Ternary blends of high-density polyethylene-polystyrene-poly(ethylene/butylene-b-styrene) copolymers: Properties and orientation behavior in plane-strain compression
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Ternary blends of high-density polyethylene-polystyrene-poly(ethylene/butylene-b-styrene) copolymers: Properties and orientation behavior in plane-strain compression

机译：高密度聚乙烯-聚苯乙烯-聚（乙烯/丁烯-b-苯乙烯）共聚物的三元共混物：平面应变压缩的性能和取向行为

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Ternary blends of high-density polyethylene (HDPE) with atactic polystyrene (PS) and styrene- ethylene/butylene-styrene block copolymer (SEBS) were deformed by plane-strain compression in a channel die. The samples were deformed up to the true strain of 1.8 (compression ratio of 6) at 100 degrees C. Thermal and mechanical properties of the deformed blends were studied in addition to the study of the deformation process. The basic mechanism of plastic deformation is crystallographic slip, the same as that active in deformation of plain HDPE and binary blends of HDPE and PS. This slip is supplemented by the plastic deformation of an amorphous component. In blends of high SEES content, the role of deformation of an amorphous component by shear and flow increases markedly due to reduced overall crystallinity of these blends. In such blends an amorphous component includes a semicontinuous embedding of crystallites, and therefore, the deformation process is dominated by deformation mechanisms active in a more compliant amorphous phase. Consequently, with increasing the content of SEES in the blend, the texture of the oriented blends changes from a single-component (100)[001] texture to a texture with a strong fiber component in addition to a (100)[001] component. In blends with high content of SEES, the crystalline lamellae of polyethylene do not undergo fragmentation up to the compression ratio of 6, while in blends with low and moderate content of SEES, such lamellar fragmentation was detected. (C) 2000 John Wiley & Sons, Inc. [References: 12]
机译：高密度聚乙烯（HDPE）与无规聚苯乙烯（PS）和苯乙烯-乙烯/丁烯-苯乙烯嵌段共聚物（SEBS）的三元共混物在通道模中通过平面应变压缩而变形。样品在100摄氏度下变形至真实应变为1.8（压缩比为6）。除了研究变形过程外，还研究了变形共混物的热和机械性能。塑性变形的基本机理是结晶滑移，与普通HDPE以及HDPE和PS的二元共混物的变形相同。无定形组分的塑性变形补充了这种滑移。在高SEES含量的共混物中，由于这些共混物的总体结晶度降低，无定形组分因剪切和流动而变形的作用显着增加。在这种共混物中，无定形组分包括微晶的半连续包埋，因此，变形过程由在更柔顺的无定形相中起作用的变形机理主导。因此，随着共混物中SEES含量的增加，定向共混物的织构从单组分（100）[001]织构变为具有强纤维组分的织构，除了（100）[001]组分外。在SEES含量高的共混物中，聚乙烯的结晶薄片在6的压缩比下不会发生断裂，而在SEES含量低和中等的共混物中则检测到这种层状断裂。 （C）2000 John Wiley＆Sons，Inc. [参考：12]

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