Study on the structure and property of heat resistant PU prepared by compounding polyol

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  • 1. School of Material Science and Engineering,Chongqing University of Technology,Chongqing 400054;
    2. Chongqing Municipal Key Laboratory of Institutions of Higher Education for Mould Technology,Chongqing 400054;
    3. Key Laboratory of Advanced Manufacturing Technology for Automobile Parts,Ministry of Education,Chongqing 400054

Received date: 2020-03-02

  Revised date: 2021-03-16

  Online published: 2021-06-29

Abstract

A series of heat-resistant polyurethane(PU) materials were synthesized by prepolymer method with crosslinked polyoxypropylene glycol,phthalic anhydride polyester polyol and diphenylmethanediisocyanate.The effect of the ratio of two-component polyols on the micro phase structure of PU was studied.It was found that when the ratio of polyoxypropylene glycol to phthalic anhydride polyester polyol was 30/70,the tensile strength was 71.96MPa,and the impact toughness was 84.45kJ/m2.This was due to the better phase separation between the soft segment and the hard segment of PU.PU had excellent dynamic mechanical properties and thermal properties,tanδ was about 0.70,and there was no thermal loss before 310℃.The addition of phthalic anhydride polyester polyol significantly improved the thermal properties of PU.

Cite this article

An Jiaxuan, Tang Ting, Xiang Hongxia, Zeng Xiaoyan, Li Youbing, Yang Chaolong . Study on the structure and property of heat resistant PU prepared by compounding polyol[J]. New Chemical Materials, 2021 , 49(6) : 83 -87 . DOI: 10.19817/j.cnki.issn 1006-3536.2021.06.019

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