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THE MORPHOLOGY AND STRUCTURE OF POLYETHYLENE TEREPHTHALATE SPHERULITES
作者姓名:李历生
作者单位:Department of
基金项目:Projects Supported by the Science Fund of the Chinese Academy of Sciences
摘    要:The morphology and structure of three types of normal and abnormal spherulites of polyethylene terephthalate cast from solution in dimethylphthalate were studied by polarizing microscopy, transmission electron microscopy and electron diffraction techniques. In the normal negative spherulites the 0]~* direction is parallel to the radius direction. In the normal positive spherulites the radius direction is parallel to the 6]~*. In the abnormal PET spherulites the Maltese cross extinction pattern in the polarizing microscope under crossed polars is oriented at 45°to the polars and there are concentric extinction rings around the center of the spherulite. Electron diffraction pattern indicates that 2]~* is parallel to the radius of the spherulite and this explains the observed extinction pattern, in the abnormal spherulite.

收稿时间:1984-04-04

THE MORPHOLOGY AND STRUCTURE OF POLYETHYLENE TEREPHTHALATE SPHERULITES*
LI Lisheng.THE MORPHOLOGY AND STRUCTURE OF POLYETHYLENE TEREPHTHALATE SPHERULITES[J].Chinese Journal of Polymer Science,1984,0(2):169-176.
Authors:LI Lisheng
Institution:Department of Chemistry; Peking University; Beijing
Abstract: The morphology and structure of three types of normal and abnormal spherulites of polyethylene terephthalate cast from solution in dimethylphthalate were studied by polarizing microscopy, transmission electron microscopy and electron diffraction techniques. In the normal negative spherulites the 210]* direction is parallel to the radius direction. In the normal positive spherulites the radius direction is parallel to the 326]*. In the abnormal PET spherulites the Maltese cross extinction pattern in the polarizing microscope under crossed polars is oriented at 45°to the polars and there are concentric extinction rings around the center of the spherulite.Electron diffraction pattern indicates that212]* is parallel to the radius of the spherulite and this explains the observed extinction pattern in the abnormal spherulite.
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