基于PTMG-TDI的低游离TDI浇注型PU弹性体的制备与性能研究  

Preparation and property of PTMG-TDI based castable polyurethane elastomer with low free TDI monomer

作　　者：易玉华[1] 陈万滨[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640

出　　处：《橡胶工业》2010年第2期82-85,共4页China Rubber Industry

摘　　要：以四氢呋喃均聚醚和甲苯二异氰酸酯为原料,采用分子蒸馏法合成PU预聚体,以3,3′-二氯-4,4′-二氨基二苯甲烷为扩链剂制备低游离甲苯二异氰酸酯浇注型PU弹性体,并对其性能进行研究。结果表明,与常规PU预聚体与扩链剂的混合体相比,低游离PU预聚体与扩链剂的混合体具有良好的流动性和较快的固化速度;低游离PU弹性体与常规PU弹性体拉伸强度和撕裂强度相差不大,但前者回弹值较大、压缩永久变形较小、动态性能较好。Using PTMG and TDI as raw materials,a polyurethane（PU）prepolymer was synthesized by molecular distillation method,then a castable PU elastomer with low free TDI monomer was prepared with 3,3＇-dichloro-4,4＇-diamino diphenylmethane chain extender,and its properties were investigated.The results showed that,the PU prepolymer and chain extender mixture possessed good flow behaviour and faster curing rate compared with general PU prepolymer;the tensile strength and tear strength were similar to those of general PU elastomer,but resilience was higher,compression set was lower and dynamic property was better.

关 键 词：四氢呋喃均聚醚 甲苯二异氰酸酯 浇注型聚氨酯弹性体 低游离型 工艺性能 物理性能 动态性能 

分 类 号：TQ334[化学工程—橡胶工业]