微交联PPG型聚氨酯弹性体的制备与性能

doi:10.11896/cldb.19110165

材料导报

2020, Vol. 34

Issue (16): 16172-16176 https://doi.org/10.11896/cldb.19110165

高分子与聚合物基复合材料

微交联PPG型聚氨酯弹性体的制备与性能

许召赞¹, 李江², 伍伟玲², 党海春², 李剑锋¹

1 山西大学资源与环境工程研究所,太原 030006;
2 太原工业学院材料工程系,太原 030008

Synthesis and Properties of Micro-crosslinked Poly-propylene Glycol Based Polyurethane Elastomer

XU Zhaozan¹, LI Jiang², WU Weiling², DANG Haichun², LI Jianfeng¹

1 Institute of Resources and Environmental Engineering, Shanxi University, Taiyuan 030006, China;
2 Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China

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摘要聚氧化丙烯多元醇(PPG)型聚氨酯弹性体具有良好的耐水解性和耐候性,但其力学性能和耐热性能不足。本工作以丙氧化季戊四醇(PPG-4,四官能度聚醚多元醇)、4,4′-二苯基甲烷二异氰酸酯(MDI) 和PPG-1000为原料,合成含有交联中心的PPG型聚氨酯预聚体,以1,4-丁二醇(BDO) 为扩链剂制备微交联PPG型聚氨酯预聚体弹性体。通过拉伸试验、维卡软化温度测试、动态力学性能分析(DMA)、差示扫描量热(DSC)和动态流变等手段,考察了不同PPG-4含量对PPG型聚氨酯弹性体力学性能、热性能和流变性能的影响。研究结果表明,PPG-4的加入可提高PPG型聚氨酯弹性体的拉伸强度、撕裂强度和硬度;微交联PPG型聚氨酯预聚体弹性体的耐热性能显著提升,其维卡软化温度由90 ℃(PPG-4含量为0%)提高至135 ℃(PPG-4占PPG-1000含量的3%);DSC与DMA结果表明,微交联PPG型聚氨酯预聚体弹性体的玻璃化转变温度明显提高;流变测试表明,PPG型聚氨酯弹性体的弹性模量、粘性模量和复数黏度均显著提高。

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关键词: 聚氨酯弹性体微交联聚氧化丙烯多元醇

Abstract: Poly-propylene glycol based polyurethane elastomer shows excellent hydrolysis and weather resistance, poor heat resistance and mechanical property. In this work, the prepolymer containing crosslinking center was synthesized by adding pentaerythritol propoxylate into the system of 4,4′-diphenylmethane diisocyanate and poly-propylene glycol. Micro-crosslinked polyurethane elastomer was further synthesized with addition of 1,4-butanediol as the chain extender. The effect of pentaerythritol propoxylate content or crosslinking degree on the heat resistance, mechanical and rheological properties was investigated. It was found that the tensile strength, tear strength, hardness and heat resistance were improved with the addition of pentaerythritol propoxylate. Vicat softening temperature was enhanced from 90 ℃ of controlled uncrosslinked polyurethane elastomer to 135 ℃ when the additive amount of pentaerythritol propoxylate was 3% of PPG-1000. The glass-transition temperature, elasticity modulus, viscous modulus and complex viscosity of poly-propylene glycol based polyurethane elastomer were also enhanced.

Key words: polyurethane elastomer mico-crosslinking poly-propylene glycol

出版日期: 2020-08-25 发布日期: 2020-07-24

ZTFLH:

TQ323.8

基金资助: 国家自然科学基金(21908136);山西省高校科技创新基金项目(2019L0927);山西省“1331工程”重点学科(1331KSC)和协同创新中心建设计划(1331CIC)

通讯作者: dhccitrus2011@163.com

作者简介: 许召赞,山西大学讲师。2010年于青岛科技大学获理学学士学位,2013年于四川大学获理学硕士学位,2013—2015年于重庆文理学院材料与化工学院任教,2018年于中国科学院大学(中国科学院山西煤炭化学研究所)获工学博士学位。2018年入职山西大学资源与环境工程研究所。主持国家自然科学基金青年基金项目1项(21908136)。主要研究方向为高分子合成、高分子膜材料及水处理膜制备。
党海春,太原工业学院副教授。2006年9月至2015年6月,在四川大学获得化学专业理学学士学位和高分子化学与物理专业理学博士学位。2015年至今,在太原工业学院材料工程系任教,以第一作者发表SCI 论文3篇、EI论文1篇,已获授权国家发明专利3项。获太原工业学院“学术带头人”称号。研究方向为聚氨酯材料的合成、无机微纳米材料的构筑及聚氨酯与无机微纳米复合材料的制备。

引用本文:

许召赞, 李江, 伍伟玲, 党海春, 李剑锋. 微交联PPG型聚氨酯弹性体的制备与性能[J]. 材料导报, 2020, 34(16): 16172-16176.
XU Zhaozan, LI Jiang, WU Weiling, DANG Haichun, LI Jianfeng. Synthesis and Properties of Micro-crosslinked Poly-propylene Glycol Based Polyurethane Elastomer. Materials Reports, 2020, 34(16): 16172-16176.

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http://www.mater-rep.com/CN/10.11896/cldb.19110165 或 http://www.mater-rep.com/CN/Y2020/V34/I16/16172

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