摘要
采用预聚物法合成了以聚己二酸乙二醇丙二醇酯(PEPA)甲苯二异氰酸酯(TDI)预聚体,3种芳香族二胺3,3′-二氯-4,4′-二胺基二苯甲烷(MOCA),4,4′-亚甲基-双(3-氯-2,6-二乙基苯胺)(M-CDEA),3,5-二甲硫基甲苯二胺(DMTDA)为扩链剂制备浇注型聚氨酯弹性体.通过常规和老化力学性能测试、动态力学性能分析和热重分析对二胺/TDI体系的聚氨酯弹性体性能进行了研究.结果表明,芳香族二胺扩链的聚氨酯弹性体具有优异的力学性能,尤其是扩链剂M-CDEA)制备的聚氨酯弹性体热空气老化性能好,高温下储能模量高,动态内生热低,热分解温度高,具有优异的耐热性能.
Polyethylene glycol propylene glycol adipate（PEPA）toluene diisocyanate（TDI）prepolymers were synthesized by prepolymer method.3 kinds of aromatic diamines 3,3′-dichloro-4,4′-diaminodiphenylmethane（MOCA）,4,4′-methylene-bis（3-chloro-2,6-diethyl-aniline）（M-CDEA）,3,5-dimethyl-thiotoluene diamine（DMTDA）was a chain extender for the preparation of casting polyurethane elastomers.The properties of the polyurethane elastomer of the diamine/TDI system were studied by conventional and aging mechanical properties tests,dynamic mechanical properties and thermogravimetric analysis.The results show that the aromatic diamine chain extender polyurethane elastomer has excellent mechanical properties,especially the polyurethane elastomer prepared by the chain extender（M-CDEA）has good thermal air aging performance,high storage modulus at high temperature,low dynamic endogenous heat,high thermal decomposition temperature and excellent thermal resistance.
作者
杨惠弟
刘凉冰
党海春
YANG Hui-di;LIU Liang-bing;DANG Hai-chun(Dept.of Materials Engineer,Taiyuan Institute of Technology,Taiyuan 030008,China)
出处
《中北大学学报（自然科学版）》
CAS
2018年第5期586-590,共5页
Journal of North University of China(Natural Science Edition)
基金
山西省"1331工程"重点学科支持项目
关键词
聚氨酯弹性体
二胺扩链剂
力学性能
动态性能
热分解温度
polyurethane elastomer
diamine chain extender
mechanical properties
dynamic properties
thermal decomposition temperature
