Ultradrawing, Thermal and Dynamic Mechanical Properties of Ultra-high Molecular Weight Polyethylene/Carbon Nanotube Fibers Prepared at Varying Formation Temperatures

摘要：

The achievable draw ratios (Dra) of ultrahigh molecular weight polyethylene (UHMWPE)/carbon nanotubes (CNTs) as-prepared fibers prepared near the optimum concentration improve consistently as their CNTs concentrations increase up to an optimum value. Moreover, the Dra values of the UHMWPE/CNTs fiber specimens prepared from the optimum composition of the UHMWPE/CNTs gel solutions improve significantly as their spinning formation temperatures reduce to an optimum temperature of 5 . In fact, the D ℃ra value of the UHMWPE/CNTs fiber specimen prepared using the optimum composition and formation temperature is more than 120 % higher than those of the UHMWPE as-prepared fiber specimen prepared at the optimum concentration and formation temperature. As evidenced by DSC analysis, the percentage crystallinity and melting temperature values of the as-prepared UHMWPE/CNTs fibers increase and reduce significantly as their CNTs contents increase, respectively. In contrast, the percentage crystallinity and melting temperature values of the as-prepared UHMWPE/CNTs fibers increase significantly as their formation temperatures increase. Dynamic mechanical analysis of the UHMWPE and UHMWPE/CNTs fiber specimens exhibited an extraordinary high ℃ transition peaked at temperatures near 95- 115 , which increase significantly as their ℃ formation temperatures and/or CNTs contents increase. In order to understand these interesting drawing, thermal and dynamic mechanical properties of the UHMWPE and UHMWPE/CNTs as-prepared fiber specimens, the birefringence, morphological and tensile properties of the as-prepared and drawn fibers were investigated. Possible mechanisms accounting for these interesting properties are proposed.

关键词： gel formation temperatures (Tf) achievable draw ratios (Dra)

作者: Jen-Taut Yeh ShuiChuan Lin YuChing Lai Hai Liu

作者单位: Graduate School of Polymer Engineering, National Taiwan University of Science and Technology, Taipei Department of Polymer Materials, Vanung University, Taoyuan320, Taiwan Graduate School of Polymer Engineering, National Taiwan University of Science and Technology, Taipei Faculty of Chemistry and Material Science, Hubei University, Wuhan, China

会议类型: 国际会议

会议名称: The 12th Asian Pacific Confederation of Chemical Engineering Congress(第十二届亚太化工联盟大会暨化工展览会)

会议地点: 大连

会议语种:英文

在线出版日期: 2008-08-04（万方平台首次上网日期，不代表论文的发表时间）