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.
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
[1] 朱长春,吕国会.中国PU产业现状及“十三五”发展规划建议[J].PU工业,2015(3):1-25.
[2] 王瑞,宋文生,郝路,等.PU耐热性研究进展[J].塑料科技,2015,43(12):101-104.
[3] Javier P,Juan B.Glass transition temperature of low molecular weight poly(3-aminopropyl methyl siloxane).a molecular dynamics study[J].Polymer,2002,43(22):6049-6055.
[4] 林兴权,林嘉怡,许紫婷,等.PU弹性体的合成与耐热性能研究[J].PU工业,2018,33(6):18-21.
[5] Mehdipour-Ataei S,MahmoodiA.New polyurethane elastomers with enhanced thermal stability[J].Polymer-Plastics Technology and Engineering,2014,53(15):1553-1560.
[6] Lei W Q,Fang C Q,Zhou X,et al.Polyurethane elastomer composites reinforced with waste natural cellulosic fibers from office paper in thermal properties[J].Carbohydrate Polymers,2018,197:385-394.
[7] 景欣,王军威,赵雨花,等.基于不同软段的PU弹性体耐热性能研究[J].PU工业,2019,34(1):19-22.
[8] 刘小祥,刘翼,安珈璇,等.连续长玻璃纤维增强PU复合材料的制备与力学性能[J].复合材料学报,2019,36(3):617-620.
[9] 邓艺晋.含十八烷基支链PU弹性体结构与性能研究[D].广州:华南理工大学,2013.
[10] Legass R R.Domain structure and time-dependent properties of a crosslinked urethane elastomer[J].Journal of Applied Polymer Science,1977,27(9):2489-2503.
[11] 朱金华,姚树人.PU弹性体结构与动态力学性能研究[J].高分子材料科学与工程,2000(5):107-109.
[12] 赵雨花,王军威,亢茂青,等.高性能PU密封材料的微相结构和热性能(Ⅱ)[J].热固性树脂,2016(4):42-53.
[13] 莫健华,罗华.浇注型耐热PU树脂材料的热性能和力学性能[J].化工学报,2005,56(7):1368-1371.
