功能助剂对聚醚聚氨酯网络性能的影响  

Effect of Functional Agent on the Characteristics of Polyether-Urethane Networks

作　　者：魏晓安[1] 何卫东[1] 王泽山[1] 

机构地区：[1]南京理工大学化工学院,江苏南京210094

出　　处：《火炸药学报》2007年第4期33-37,共5页Chinese Journal of Explosives & Propellants

基　　金：国家"973"项目

摘　　要：分别采用4种功能助剂通过拉伸实验和DMA试验对聚醚聚氨酯网络体系进行性能研究。结果表明,改性含羟基丙烯酸树脂中的羟基比聚醚多元醇PET(2f,5500)中的羟基活性高,更易于与IPDI反应,形成两相结构,玻璃化温度分别为-43.28℃和38.01℃;可绕性环氧树脂与三羟甲基丙烷相类似,网络体系的力学性能不理想;三元树脂中的羟基和聚醚多元醇的羟基活性相当,形成互穿网络体系后延伸率超过1200%、强度达到2.57MPa,玻璃化温度-68℃。最后得出,三元树脂是较为理想的扩链剂。The characteristics of polyether-urethane networks containing four different functional agents were studies by stress-strain （ε-δ） and DMA test. The results show that the activity of hydroxide groups from modified acrylic resin were higher than that from the PET（2f 5500） and the former is easier to react with IPDI than the latter, leading to two phases framework, two glass transition temperatures, one was -43.28℃ and the other was 38.01℃. The flexible epoxy resin and 1,1,1-tri（hydroxyl methyl） propane were similar to the modified acrylic, its mechanics were not so good. The activity of hydroxide groups from tri-copolymer was correspond to PET＇s, the mutual network were formed through this method, the prolongation ratios was beyond 1200%,the intensity reached to 2.67MPa,and the glass transition temperature was below -68℃, considering that the tricopolymer was a perfect functional agent.

关 键 词：物理化学 聚醚聚氨酯 功能助剂 PET IPDI 力学性能 互穿网络 

分 类 号：TQ452[化学工程—农药化工]