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首页> 外文期刊>Journal of Applied Polymer Science >On morphologies developed during two-dimensional compaction of woven polypropylene tapes
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On morphologies developed during two-dimensional compaction of woven polypropylene tapes

机译：关于二维压实聚丙烯编织带过程中形成的形貌

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摘要

The microstructure of compacted woven polypropylene cloths prepared at their optimum compaction temperature of 184 degrees C has been examined. Details of transverse and longitudinal cross-sections have been revealed by permanganic etching and observed with scanning electron microscopy. The original cloth was found to contain perpendicular cracks and biconical defects reported previously in other systems. After compaction, the cloth bonded together to form a thick solid sheet, with a melting point raised for the residual material but reduced for the recrystallized component. The higher melting regions form a continuous three-dimensional network with linear traces in a longitudinal section, in agreement with recent observations of fiber structure. Recrystallization occurs both within and externally from tapes: where parallel tapes meet, transcrystalline layers emanate from tape surfaces, with a distinct line where the two growth fronts meet. In some more extensive recrystallized regions row structures are formed, probably indicating local flow during compaction. (C) 2000 John Wiley & Sons, Inc. [References: 23]
机译：已经检查了在其最佳压实温度为184摄氏度下制备的压实聚丙烯编织布的微观结构。高锰酸钾腐蚀已揭示出横向和纵向截面的细节，并用扫描电子显微镜观察到。发现原来的布料包含先前在其他系统中报告的垂直裂缝和双圆锥缺陷。压实后，布粘合在一起形成厚实的固体片材，其熔点对于残余材料而言升高，但对于重结晶组分而言降低。与最近对纤维结构的观察一致，较高熔点的区域形成了在纵向截面上具有线性迹线的连续三维网络。重结晶发生在带内和带外：在平行带相遇的地方，从带表面发生了跨晶层，在两个生长前沿相交处有一条明显的线。在一些更广泛的重结晶区域中，形成了行结构，这可能表明压实过程中出现了局部流动。 （C）2000 John Wiley＆Sons，Inc. [参考：23]

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