【作者】 李万捷； 李莉； 贾林才；

【Author】 LI Wan-jie;LI Li;JIA Lin-cai;Chemistry and Chemical Engineering College,Taiyuan University of Technology;

【机构】 太原理工大学化学化工学院； 山西省化工研究所；

【摘要】 以聚醚多元醇、二苯基甲烷二异氰酸酯、甲苯二异氰酸酯和3,3′-二氯-4,4′-二氨基-二苯基甲烷为原料,制备了TDI-80/MDI-50型聚氨酯弹性体。研究了MDI-50与TDI-80质量比对聚氨酯预聚体黏度、成型时的凝胶时间以及对聚氨酯弹性体撕裂强度、拉伸强度、扯断伸长率和磨耗量等性能的影响。通过红外光谱(FTIR)、热重(TG)、差热分析(DTA)和差示扫描量热仪(DSC),研究了聚氨酯弹性体的结构变化和耐温性。结果表明:MDI-50与TDI-80质量比为6:4时,预聚体流动性好,易于成型操作,弹性体材料综合性能优良。更多还原

【Abstract】 A blending polyurethane elastomer was synthesized with diphenyl-methane- diisocyanate,toluene diisocyanate,polyether polyol and 4,4’-methylenebis(2-chloroaniline).The relationship between MDI-50/TDI-80 ratio and properties of the prepolymer and polyurethane elastomer had studied,such as viscosity,gelation time,tensile strength,tearing strength and abrasion value.The structure and themal propertie of the blending polyurethane elastomer was examined through infrared spectroscopy(FTIR),thermogravimetry(TG) and differential scanning calorimetry(DSC),respectively.The results show when the MDI-50 /TDI-80 ratio is 6:4,the prepolymer has a good liquidity and easy to operate and the blending polyurethane elastomer has a good performance.更多还原