Preparation and Properties of Waterborne Polyurethane/Polyacrylate Self-Healing Materials Based on Disulfide Bond

被引：0
|
作者：
Feng J. [1 ]
Wang Y. [1 ]
Wang X. [1 ]
机构：
[1] College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi'an
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2021年 / 37卷 / 08期
关键词：
Disulfide bond; Polyacrylate; Self-healing; Waterborne polyurethane;
D O I：
10.16865/j.cnki.1000-7555.2021.0220
中图分类号：
学科分类号：
摘要：
Aqueous polyurethane containing disulfide bond (WPUS) was prepared by using PTMEG and IPDI as monomer, DMPA, BDO and HEDS as chain extender. A series of self-healing waterborne polyurethane/polyacrylate (AWPUS) composites with different proportions were prepared with polyacrylate (PA) emulsion by physical blending. FT-IR, Raman spectroscopy, particle size distribution, UV-vis, XRD, TGA, mechanics, SEM and polarizing microscope were used to analyze the microstructure, composition, thermal stability and self-healing performance of the composites. The effects of PA/WPUS ratio on the self-healing performance of the films were also investigated. The results show that the introduction of PA can significantly improve the self-healing efficiency of the materials. At 60 ℃, the repair efficiency is increased from 73.4% in 6 h to 81.7% in 2 h. When the PA/WPUS mass ratio is 3/7, the tensile strength and strain are 16.8 MPa and 704%, respectively; after 5 loading-unloading cycles, the stress recovery rate reaches 84.3%, showing good thermal stability, reprocessability and excellent comprehensive performance. © 2021, Editorial Board of Polymer Materials Science & Engineering. All right reserved.
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页码：83 / 92
页数：9
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