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Morphology Change of Extrusion Molded Crystalline Polymer by Rolling Process

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Abstract:

In this work, the spring back, dimensional change, internal structure and morphology of extruded polypropylene were investigated in order to consider the rolling characteristic. It was found that the internal structure, molecular orientation and crystallinity were changed a little by high spring back under low reduction in thickness. Crystal structure was extended along the rolling direction with high reduction in thickness due to the increase of plastic deformation. As a result, molecular orientation increased and crystallinity decreased at over 30% of reduction in thickness. Crystalline structure of surface was similar to the center part in cross-section at 70% reduction in thickness, and molecular orientation was constant.

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Periodical:

Advanced Materials Research (Volumes 391-392)

Pages:

595-599

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.391-392.595

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Online since:

December 2011

Authors:

Takuya Murata, Jian Hui Qiu, Eiichi Sakai, Xue Li Wu, Makoto Kudo

Keywords:

Rolling , Microstructure, Molecular Orientation, Plastic Deformation, Polypropylene (PP)

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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