Enhanced tensile properties of ultra-high molecular weight polyethylene fibers by solubility improvement with mixed solvents

被引:0
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作者
Wang, Yi [1 ]
Wang, Xinwei [2 ,3 ]
Fu, Jiabin [1 ]
Yu, Junrong [1 ]
Wang, Yan [1 ]
Hu, Zuming [1 ]
机构
[1] State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai, China
[2] State Key Laboratory of Polyolefins and Catalysis, Shanghai Research Institute of Chemical Industry, Shanghai, China
[3] Shanghai Key Laboratory of Catalysis Technology for Polyolefins, Shanghai Research Institute of Chemical Industry, Shanghai, China
来源
Journal of Applied Polymer Science | 2023年 / 140卷 / 15期
关键词
National Key R&D Program of China; Grant/Award Number: 2021YFB3700103 Funding information;
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摘要
The tensile properties of ultra-high molecular weight polyethylene (UHMWPE) fibers obtained from mixed solvents are addressed by virtue of improved solubility. In this work, olive oil (OO) was introduced as a poor solvent for the pre-swelling of UHMWPE in decalin, and its mass percentage was intended to be 10, 20, 30, and 40 wt% of UHMWPE. Then UHMWPE fibers with high molecular weight retention and low entanglement were prepared with paraffin oil as spinning solvent by gel-spinning and hot-drawing. Unlike other samples, there is a more significant molecular chain disentanglement and higher molecular weight retention for UHMWPE fibers as OO addition is 20 wt%. Surprisingly, obtained UHMWPE fibers exhibit tensile strength up to 33.85 cN/dtex and tensile modulus of 1673.27 cN/dtex, with an increase of 24.0% and 32.3%, respectively, compared with that of UHMWPE fibers without decalin/OO pre-swelling. Furthermore, the obtained UHMWPE fibers are accompanied by a marked improvement in melting temperature, crystallization and orientation. © 2023 Wiley Periodicals LLC.
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