微交联PPG型聚氨酯弹性体的制备与性能

doi:10.11896/cldb.19110165

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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

Published: 24 July 2020

CLC number:

TQ323.8

Fund:This work was financially supported by the Nationa Natural Science Foundation of China (21908136), Scientific and Technological Innovation Projects of Colleges and Universities in Shanxi Province (2019L0927) and Shanxi “1331 Project” Key Subject Contruction (1331KSC) and Collaborative Innvation Ceter (1331CIC).

About author:: Zhaozan Xu(Shanxi University) received his B.S. degree (2010) from Qingdao University of Science and Technology, his M.S. degree from Sichuan University (2013), and his Ph.D. from University of Chinese Academy of Sciences (2018). He was a teacher in Chongqing University of Arts and Sciences (2013—2015). He joined Institute of Resources and Environmental Engineering, Shanxi University in 2018 and received financial support from the National Natural Science Foundation of China (21908136) in 2019. His research mainly focuses on polymer synthesis, polymeric membrane materials and membranes for wastewater reuse and resource recovery.
Haichun Dangobtained her B.S.degree (2010) and Ph.D. from Sichuan University (2015). She joined in Department of Materials Engineering, Taiyuan Institute of Technology in 2015. She is currently an associate professor. She has published 5 journal papers as the first author and 3 national invention patents. Her current research focuses on the synthesis of polyurethane, preparation of inorganic nanoparticles and polymer composites.

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	XU Zhaozan
	LI Jiang
	WU Weiling
	DANG Haichun
	LI Jianfeng

Cite this article:

XU Zhaozan,LI Jiang,WU Weiling, et al. Synthesis and Properties of Micro-crosslinked Poly-propylene Glycol Based Polyurethane Elastomer[J]. Materials Reports, 2020, 34(16): 16172-16176.

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

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