Crystallization behavior of high-density polyethylene in an oriented blend with polypropylene
作者:
Y. Nishio,
T. Yamane,
T. Takahashi,
期刊:
Journal of Macromolecular Science, Part B
(Taylor Available online 1984)
卷期:
Volume 23,
issue 1
页码: 17-27
ISSN:0022-2348
年代: 1984
DOI:10.1080/00222348408229360
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Crystallization behavior of high-density polyethylene blended with polypropylene was investigated in the oriented system, using wide-angle and small-angle x-ray diffractometries and electron microscopy. When polypropylene/polyethylene (PP/PE) drawn blends were heat treated in the temperature range above the melting point of PE, a new orientation texture of PE was produced during melt-recrystallization in the PP matrix. The majority of PE crystallites are aligned with their (110) planes perpendicular to the draw direction of the film specimen. Furthermore, well-developed lamellar structure is formed in the PE phase, along the crystallite b axes oriented preferentially at angles of 30-40° to the draw direction. The reason that such a distinctive orientation texture of PE develops in the blend with PP is discussed in some detail. As a possible explanation, it is suggested that thermal shrinking stress greatly affects the crystallization behavior of PE.
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