发明名称 |
Process for producing polymer oriented crystal, polymer oriented crystal produced by said production process, and method for determining critical elongation strain rate of polymer melt |
摘要 |
A method and means for determining a critical elongation strain rate of a polymer melt, which make it possible to subject a polymer melt to elongation to prepare a bulk oriented melt, are established, and a process for producing bulk polymer oriented crystals and polymer oriented crystals are provided. In the critical elongation strain rate determination process or critical elongation strain rate determining method, a polymer melt (3) in a disc shape having a radius x0 and a thickness of &Dgr;z0 is held between transparent plates (an upper transparent plate (1) and a lower transparent plate (2)). The polymer melt (3) is cooled to a supercooled state and is press in a thickness direction at a constant rate v by using the transparent plates. The critical point radius x*, at which the polymer melt (3) is turned to an oriented crystal, is measured, and the critical elongation strain rate &egr; is calculated by equation &egr;*=ax*3 wherein α=v/(2&Dgr;z0x03).
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申请公布号 |
US7871548(B2) |
申请公布日期 |
2011.01.18 |
申请号 |
US20060065197 |
申请日期 |
2006.08.31 |
申请人 |
NATIONAL UNIVERSITY OF CORPORATION HIROSHIMA UNIVERSITY |
发明人 |
HIKOSAKA MASAMICHI;WATANABE KAORI |
分类号 |
G01B21/32;B29C47/92;G01N3/00 |
主分类号 |
G01B21/32 |
代理机构 |
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地址 |
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