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首页> 外文会议>Advances in key engineering materials >Fracture and Deformation of Extended-Chain Crystals in Poly (ethylene terephthalate)/Bisphenol-A Polycarbonate Blends Crystallized at High Pressure
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Fracture and Deformation of Extended-Chain Crystals in Poly (ethylene terephthalate)/Bisphenol-A Polycarbonate Blends Crystallized at High Pressure

机译：高压结晶的聚对苯二甲酸乙二酯/双酚A聚碳酸酯共混物中扩展链晶体的断裂和变形

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摘要

With a combination of three-dimensional crystal ordering and long-chain molecular orientational ordering, the extended-chain crystals of polymers are ideal system for the studies on low-dimensional physics, and have potential applications as functional components. In this study, poly (ethylene terephthalate) / bisphenol-A polycarbonate (PET/BAPC) blend samples were prepared with solid phase forming technique under high pressure, and extended-chain single crystals with large c-axis thickness were formed within a relative short time. The fracture and deformation behaviors of the grownup crystals were investigated using scanning electron microscopy (SEM) and atomic force microscopy (AFM). Morphological observation showed that most of the extended-chain crystals were endowed with perfect appearance after the sample fracture. However, there were still a few crystals fractured apart, along or perpendicularly to their c-axis direction, or with cohesive fracture surfaces. Fractured spherulites with extended-chain lamellae as substructures were also disclosed in extended-chain crystals with AFM. Furthermore, the parallel lamellae deformed and changed their striation direction during the crystal growth, as was observed on a kind of extended-chain crystals grown in a PET oligomer and BAPC blend (PETO/BAPC). This study may be instructive to the improvement of the separation technique of such single crystals, so as to hasten their real applications.
机译：聚合物的长链晶体结合了三维晶体有序和长链分子取向有序，是低维物理研究的理想系统，具有潜在的应用作为功能成分。在这项研究中，采用高压固相成型技术制备了聚对苯二甲酸乙二醇酯/双酚A聚碳酸酯（PET / BAPC）共混物样品，并在相对较短的时间内形成了具有大c轴厚度的延伸链单晶。时间。使用扫描电子显微镜（SEM）和原子力显微镜（AFM）研究了长大的晶体的断裂和变形行为。形态学观察表明，样品断裂后，大多数延伸链晶体具有完美的外观。但是，仍然有一些晶体沿着或垂直于其c轴方向断裂，或者具有内聚断裂面。在具有AFM的延伸链晶体中还公开了具有延伸链薄片作为亚结构的断裂球晶。此外，如在PET低聚物和BAPC共混物（PETO / BAPC）中生长的一种长链晶体上所观察到的，平行薄片在晶体生长期间变形并改变了它们的条纹方向。这项研究可能对改进此类单晶的分离技术具有指导意义，以加快其实际应用。

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  • 来源
  • 会议地点 Sanya(CN)
  • 作者

    Jun Lu; Jiaojiao Tian; Daopeng Zhang; Rui Huang;

  • 作者单位

    Key Laboratory of Advanced Technologies of Materials,Ministry of Education,School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan,P. R. China College of Polymer Materials Science and Engineering,Sichuan University,Chengdu 610065,Sichuan,P. R. China;

    Key Laboratory of Advanced Technologies of Materials,Ministry of Education,School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan,P. R. China;

    Key Laboratory of Advanced Technologies of Materials,Ministry of Education,School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan,P. R. China;

    College of Polymer Materials Science and Engineering,Sichuan University,Chengdu 610065,Sichuan,P. R. China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
  • 关键词

    Blends; extended-chain crystal; fracture; growth; high pressure; polyesters;

    机译：共混物;延伸链晶体;断裂;生长;高压;聚酯;

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