输送带用聚氨酯(脲)修补胶的制备与性能研究  

Preparation and properties of poly(urethane-urea)patching adhesive for conveyor belt

作　　者：谢一泽 吴小龙 姜志国[1,2] 张均 XIE Yi-ze;WU Xiao-long;JIANG Zhi-guo;ZHANG Jun(College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China;High-Tech Research Institute,Beijing University of Chemical Technology,Beijing 100029,China;Huizhou BUCT Production,Learning and Research Base Co.,Ltd.,Huizhou 516081,China)

机构地区：[1]北京化工大学材料科学与工程学院,北京100029 [2]北京化工大学高新技术研究院,北京100029 [3]惠州北化工产学研基地有限公司,广东惠州516081

出　　处：《现代化工》2023年第1期198-200,207,共4页Modern Chemical Industry

摘　　要：以二苯基甲烷二异氰酸酯(MDI)与聚四氢呋喃二醇(PTMG)的预聚物为A组分,PTMG、聚醚多元醇(330N)、端氨基聚醚(D2000)和二乙基甲苯二胺(DETDA)的混合物为B组分,制备了双组分聚氨酯(脲)修补胶。考察了异氰酸酯指数(R值)对凝胶时间、表干时间、力学性能、耐磨性能、耐水性能和耐热性能的影响。结果表明,随着R值的增大,修补胶凝胶时间和表干时间逐渐缩短,磨耗体积逐渐减小,拉伸强度、撕裂强度、剪切强度和起始热分解温度(Ti)先增加后减小;当R值为1.15时,修补胶综合性能最佳,此时拉伸强度为16.7 MPa,撕裂强度为57.1 kN/m,剪切强度为2.77 MPa,Ti为267℃。Poly(urethane-urea)patching adhesives are prepared with a prepolymer of diphenylmethane diisocyanate(MDI)and polytetrahydrofuran glycol(PTMG)as component A,and the mixture of PTMG,polyether polyol(330N),amino terminated polyether(D2000)and diethyltoluene diamine(DETDA)as component B.The effects of isocyanate index(R value)on gel time,tack-free time,mechanical property,wear resistance,water resistance and heat resistance are studied.The results indicate that the higher R value shortens the gel time and tack-free time,decreases the wear volume gradually,while makes tensile strength,tear strength,shear strength and initial thermal decomposition temperature(Ti)increase firstly and decrease lately.As R value is 1.15,the patching adhesives show the best comprehensive performance,correspondingly with a tensile strength of 16.7 MPa,a tear strength of 57.1 kN·m-1,a shear strength of 2.77 MPa and a Tiof 267℃.

关 键 词：聚氨酯(脲) 修补胶 异氰酸酯指数 拉伸强度 耐磨 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]