期刊
EUROPEAN POLYMER JOURNAL
卷 41, 期 8, 页码 1766-1771出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2005.02.033
关键词
crystal structure; compression-molding; isotactic polypropylene (iPP)
The crystalline structures of isotactic polypropylene (iPP) subjected to compression-molding were studied by means of differential scanning calorimeter (DSC), optical microscope (OM) and wide-angle X-ray diffraction (WAXD). beta-crystal can be formed from nonisothermal crystallization of the sample compression-molded at the molten state and the beta-phase content increased with increasing pressure of molding. Thermal treatment of the molten sample at 200 degrees C could eliminate the effect of compression-molding on crystalline structure. It was suggested that the compression-molding of iPP melt plays an important role in improving the nucleation ability of beta-crystal. (c) 2005 Elsevier Ltd. All rights reserved.
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