TDI三聚体的合成及其聚氨酯(脲)弹性体的制备  

Synthesis of TDI Terpolymer and Preparation of Polyurethane-urea Elastomers

作　　者：孙健[1] 郝俊松[1] 王胜军[1] 李再峰[1] 

机构地区：[1]青岛科技大学生态化工教育部重点实验室,266042

出　　处：《聚氨酯工业》2008年第6期22-24,共3页Polyurethane Industry

基　　金：石油大学重质油国家重点实验室开放基金(2006-04);中国博士后基金资助(博士后基金号20070410370);山东省中青年科学家奖励基金(2007BS04001)项目

摘　　要：以2，4-甲苯二异氰酸酯（TDI）为原料合成了TDI三聚体，用傅立叶变换红外光谱仪（FTm）进行了反应跟踪，确定了合成反应的条件；用TDI三聚体替代TDI合成了聚丁二烯一丙烯腈共聚二醇／聚四氢呋喃二醇（HTBN／PTHF）聚氨酯／脲（PUU）弹性体，对弹性体的力学性能和耐热性能进行了测定。结果表明，随着三聚反应的进行，在1706cm^-1处异氰脲酸酯环的特征峰吸收强度增强，表明三聚化程度提高；三聚反应的最佳温度为50℃。用TDI三聚体替代TDI合成的PUU弹性体在300～420℃范围内的热稳定性要比TDI基PUU的好，但其拉伸强度、伸长率和永久变形有不同程度的下降。A TDI terpolymer was prepared by 2,4-tolylene diisocyanate, analyzed by the Fourier Transform Infrared Spectroscopy （FFIR） and conditions of the TDI ternary polymerization reaction were confirmed. Poly-ether-urethane-urea（PUU） elastomers, which based on the mixture of polybutadiene-acrylonitrile copolymer glycol （HT- BN） and polytetrahydrofuran glycol （PTHF）, synthesized by TDI terpolymer instead of TDI-80/20. The mechanic and heat-resistant properties of PUU were tested. The results showed that with the increasing of co-trimerizing ring reaction, the intensity of characteristic peak （ at 1706 cm^-1 attribute to isocyanurate group） was enhanced, which revealed that the degree of co-trimerizing ring reaction of tolylene diisocyanate was increased. The optimal synthetic temperature of TDI terpolymer was 50℃. The heat-stability of PUU modified by TDI terpolymer was better than PUU modified by TDI-80/20 from 300℃ to 420℃, but the mechanic properties were lower, including tensile strength, elongation-at-break and permanent deformation.

关 键 词：TDI三聚体 聚氨酯脲 弹性体 制备 

分 类 号：TQ334[化学工程—橡胶工业]