聚氨酯/丙烯酸酯互穿网络聚合物型衬层的固化反应研究  

Curing Behavior of IPNs Liner Based on Polyurethane and Acrylate

作　　者：张兵[1,2] 韩生[1] 左海丽[2] 黄洪勇[2] 

机构地区：[1]上海应用技术学院化学与环境工程学院,上海201418 [2]中国航天科技集团公司第八研究院第八〇六研究所,湖州313000

出　　处：《材料导报》2014年第10期67-71,共5页Materials Reports

基　　金：国家自然科学基金(41171250);上海市教委科技创新重点项目(11ZZ179);上海市教委重点学科建设(J51503);曙光计划项目(11SG54);联盟计划(LM201221;LM201344);助推计划(12ZT17);上海市人才发展基金(201335)

摘　　要：以端羟基聚丁二烯(HTPB)、异佛尔酮二异氰酸酯(IPDI)、甲基丙烯酸甲酯(MMA)、丙烯酸乙酯(EA)为原料,通过同步法制备了聚氨酯(PU)/聚丙烯酸酯(P(MMA-EA))互穿网络聚合物(Interpenetrating polymer network,IPN)型衬层。采用示差扫描量热法(DSC)研究了IPN衬层的固化反应动力学,运用Kissinger极值法、Crane法确定了固化反应动力学参数。并采用傅里叶红外光谱(FTIR)及流变仪分别对固化反应速率及粘度增长速率的影响因素进行了研究。研究结果表明,随着PU和P(MMA-EA)两体系配比的接近,IPN衬层的固化反应表观活化能逐渐降低,反应速率加快,反应级数均接近1.065;反应温度及丙烯酸酯含量的变化对-NCO的消耗速率影响很大;反应温度、固化参数、交联参数及硬段含量均对粘度增长速率有较大影响。Simultaneous interpenetrating polymer network （IPN） liner based on hydroxyl-terminated polybutadiene,methyl methacrylate and ethyl acrylate were prepared using isophorone diisocyanate as curing agents.The curing reaction kinetics were investigated by differential scanning calorimetry（D S C）,and the curing kinetic parameters were obtained by Kissinger extremum method and Crane method.Furthermore,the curing reaction rate and influence factors of viscosity growth rate were studied by fourier transform infrared spectrometer （FTIR） and rheometer respectively.The results showed that when the ratio of PU to P（MMA-EA） came to 1 ∶ 1,the curing reaction apparent activation energy of IPN liner reduced,while the reaction rate accelerated accordingly with an 1.065-order reaction all the time.The-NCO consumption rate was strongly related with the reaction temperature and the content of acrylate.The results also revealed the greatly mutual influence of reaction temperature,curing parameters,crosslinking parameters and hard segment content on the viscosity growth rate.

关 键 词：聚氨酯 丙烯酸酯 互穿聚合物网络 衬层 反应动力学 

分 类 号：O643.1[理学—物理化学]