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个人信息Personal Information
教授
博士生导师
硕士生导师
性别:女
毕业院校:奈良女子大学
学位:博士
所在单位:化工学院
学科:高分子材料. 高分子化学与物理
办公地点:大连理工大学西部校区知顺楼A203
联系方式:0411-84986093
电子邮箱:binyz@dlut.edu.cn
Gelation/crystallization mechanisms of UHMWPE solutions and structures of ultradrawn gel films
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论文类型:期刊论文
发表时间:2014-01-01
发表刊物:POLYMER JOURNAL
收录刊物:SCIE、EI、Scopus
卷号:46
期号:1
页面范围:21-35
ISSN号:0032-3896
关键字:gel syneresis; gelation speed and temperature; high-strength; high-modulus UHMWPE; liquid liquid phase separation; theoretical results for SAXS
摘要:The gelation mechanisms of ultra-high-molecular-weight polyethylene (UHMWPE) chains differed significantly in decalin and paraffin, although these are typical solvents used to gel spin UHMWPE fibers with high strengths and moduli. In both solvents, gelation was attributed to liquid liquid phase separation driven by concentration fluctuations during the initial stage. The gelation speeds and temperatures differed significantly in the two solvents. In decalin, solvent flowed from the gels, syneresis occurred during crystallization and dry gel films were prepared. In contrast, in paraffin, many nucleating points appeared immediately, and no syneresis occurred even after quenching to room temperature. To prepare dry gel films, paraffin was blotted with filter paper, and paraffin residues were removed in hexane. However, the small-angle X-ray scattering spectra from both films were similar, indicating crystalline lamellae and ultradrawing.