聚硫密封胶分子迁移对聚氨酯薄膜性能的影响  

Influence of molecular migration of polysulfide sealant on performance of polyurethane film

作　　者：张瑞明[1] 刘向阳[1] 尹锐 姜志国[2] 陈树刚 Zhang Ruiming;Liu Xiangyang;Yin Rui;Jiang Zhiguo;Chen Shugang(National Key Laboratory of Human Factors Engineering,China Astronaut Research and Training Center,Beijing 100094,China;College of Materials and Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]中国航天员科研训练中心人因工程重点实验室,北京100094 [2]北京化工大学材料科学与工程学院,北京100029

出　　处：《化学推进剂与高分子材料》2020年第2期51-54,共4页Chemical Propellants & Polymeric Materials

摘　　要：将双组分聚硫密封胶(HM108B)涂覆于聚氨酯薄膜表面,制成复合薄膜样片,将样片置于80℃烘箱中45 d。通过傅里叶变换红外光谱和力学性能测试研究了聚硫密封胶分子迁移对聚氨酯薄膜的结构和性能的影响。结果表明:与未涂覆HM108B的样片相比,涂覆HM108B的样片热老化后颜色更深,拉伸强度降低程度更大;红外测试显示HM108B中小分子向聚氨酯薄膜中迁移,导致薄膜性能下降更明显。The two-component polysulfide sealant(HM108B)was coated on the surface of the polyurethane film to prepare the composite film specimen,and the specimen was placed in the oven at 80℃for 45 d.The influence of the molecular migration of polysulfide sealant on the structure and performance of the polyurethane film was investigated by using the Fourier transform infrared spectrum and the mechanical performance testing.The results show that compared with the specimens without coated HM108B,the specimens coated HM108B has darker color after heat aging,and the reduction degree of the tensile strength is greater.The infrared testing shows that the small molecules in HM108B migrated into the polyurethane film,which resulted in the significant decrease of the film performance.

关 键 词：聚氨酯 橡胶 界面 分子迁移 性能 

分 类 号：TQ334.1[化学工程—橡胶工业]