新材料与新技术

双组分多元醇制备耐热型PU的结构与性能研究

展开
  • 1.重庆理工大学材料科学与工程学院,重庆400054;
    2.重庆市模具技术重点实验室,重庆400054;
    3.汽车零部件先进制造技术教育部重点实验室,重庆400054
安珈璇(1995-),女,硕士研究生,主要研究方向为高分子材料加工。

收稿日期: 2020-03-02

  修回日期: 2021-03-16

  网络出版日期: 2021-06-29

基金资助

重庆市教委重大科技项目(KJZD-M201901101);重庆市教委创新团队项目(CXQT19027);重庆市高分子材料工程研究生导师团队项目

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

Expand
  • 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

摘要

采用预聚体法,以交联型聚氧化丙烯二醇与苯酐聚酯多元醇作为双组分软段与二苯基甲烷二异氰酸酯合成制备了一系列耐热型聚氨酯(PU)材料。探讨了软段配比对PU材料微相结构及力学性能、动态机械性能及热性能的影响。当苯酐聚酯与聚氧化丙烯二醇配比为30/70时,PU的软硬段微相分离程度较好,拉伸强度为71.96MPa,冲击韧性为84.45kJ/m2;动态热机械性能测试显示,材料的玻璃化转变温度约在120℃左右,内生热较低,tanδ为0.70。热分析发现,材料在310℃前基本无热失重,苯酐聚酯的加入显著提高了PU的热性能。

本文引用格式

安珈璇, 唐婷, 向鸿霞, 曾晓燕, 李又兵, 杨朝龙 . 双组分多元醇制备耐热型PU的结构与性能研究[J]. 化工新型材料, 2021 , 49(6) : 83 -87 . DOI: 10.19817/j.cnki.issn 1006-3536.2021.06.019

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.

参考文献

[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.
Options
文章导航

/