端—OH聚氨酯增韧环氧树脂的制备与性能研究

张忠厚; 张光辉; 谭延方; 韩琳; 陈荣源; 李亚东

doi:10.3969/j.issn.2096-1553.2019.02.005

March 2019

Article Contents

ZHANG Zhonghou, ZHANG Guanghui, TAN Yanfang, et al. Study on preparation and properties of hydroxyl-terminated polyurethane toughened epoxy resin[J]. Journal of Light Industry, 2019, 34(2): 35-42. doi: 10.3969/j.issn.2096-1553.2019.02.005

Citation: ZHANG Zhonghou, ZHANG Guanghui, TAN Yanfang, et al. Study on preparation and properties of hydroxyl-terminated polyurethane toughened epoxy resin[J]. Journal of Light Industry, 2019, 34(2): 35-42. doi: 10.3969/j.issn.2096-1553.2019.02.005 shu

Study on preparation and properties of hydroxyl-terminated polyurethane toughened epoxy resin

College of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China

Received Date: 2018-05-08

Abstract

The epoxy resin (EP) was toughened by the hydroxyl-terminated polyurethane (PU) which was synthesized by polyethylene glycol (PEG) 400 and isophorone diisocyanate (IPDI) with step-by-step and one-step methods. Toughened EP materials were prepared by EP, hydroxyl-terminated PU and triethylene tetramine. The mechanical properties and thermal properties of toughened EP were investigated. Results showed that the infrared spectra of hydroxyl-terminated PU synthesized by the two methods were approximately the same in shape.When the addition of hydroxyl-terminated PU(equivalent ratio of-OH and -NCO 6:5) was 15 phr,the elongation at break was 11.1%, the tensile shear strength was 14.9 MPa and the impact strength was 25.7 kJ/m2, which were 0.8 times,1.3 times and 1.9 times higher than those of pure EP, respectively. The toughness and bonding performance of EP were significantly improved. The Tg of hydroxyl-terminated PU toughened EP materials decreased when it was homogeneous phase and microphase separation system (hydroxyl-terminated PU content Tg decreased. The hydroxyl-terminated PU synthesized by one-step method realized EP's high-efficiency toughening and avoided the presence of benzene ring in the molecular structure, which not only improved EP's weather resistance, but also realized the rapid curing of toughened EP at room temperature. The method provides a new way for EP's toughening and rapid curing.
- epoxy resin,
- hydroxyl-terminated polyurethane,
- toughening,
- mechanical property,
- thermal property
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Study on preparation and properties of hydroxyl-terminated polyurethane toughened epoxy resin

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