热塑性聚氨酯/甲基乙烯基硅橡胶共混物性能的研究  

Properties of Thermoplastic Polyurethane/Methyl Vinyl Silicone Rubber Blends

作　　者：疏红扬 季承远 韩田琛 王新[1] SHU Hongyang;JI Chengyuan;Hart Tianchen;WANG Xin(Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《橡胶科技》2019年第1期16-20,共5页Rubber Science and Technology

摘　　要：研究热塑性聚氨酯(TPU)/甲基乙烯基硅橡胶(VMQ)共混物的性能。结果表明:未添加增容剂时,随着VMQ用量的增大,TPU/VMQ共混物的拉伸强度和拉断伸长率逐渐减小,共混物表面的接触角逐渐减小,固相表面张力逐渐增大;在TPU/VMQ共混物中添加增容剂A(含硅聚氨酯)或B(硅丙接枝共聚物),共混物的拉伸性能得到一定程度的提升;增容剂A和B的用量分别为6和4份时,共混物的拉伸性能达到最佳;在一定范围内,随着增容剂用量的增大,在TPU中分散的VMQ粒子的粒径减小,两相相容性改善。The properties of thermoplastic polyurethane(TPU)/methyl vinyl silicone rubber(VMQ)blends were studied. The results showed that,without compatibilizer,when the amount of VMQ increased,the tensile strength and elongation at break of TPU/VMQ blends gradually decreased,the contact angle on the surface of TPU/VMQ blends decreased,and the surface tension on the solid phase increased. The tensile properties of TPU/VMQ blends were improved to some extent by adding compatibilizer A(silicon-containing polyurethane) or B(silicon-propyl graft copolymer). The tensile properties of TPU/VMQ blends were the best when the amount of compatibilizer A was 6 phr,or the amount of compatibilizer B was 4 phr. Within a certain range,with the increase of the amount of compatibilizer,the size of VMQ particles dispersed in TPU was reduced,and the compatibility of the two phases was improved.

关 键 词：硅橡胶 热塑性聚氨酯 共混物 增容剂 拉伸性能 

分 类 号：TQ334[化学工程—橡胶工业] TQ333.93