空间级硅橡胶胶黏剂粘结界面改性分析  

Analysis of Adhesive Interface Modification for Space Silicone Rubber

作　　者：王凯[1] 韩婷婷[1] 徐晓炯[1] 韦祎[1] 雷刚[1] WANG Kai;HAN Tingting;XU Xiaojiong;WEI Yi;LEI Gang(Shanghai Institute of Space Power Sources,Shanghai 200245)

机构地区：[1]上海空间电源研究所,上海200245

出　　处：《宇航材料工艺》2022年第3期37-40,共4页Aerospace Materials & Technology

基　　金：国家自然科学基金(U1937601);上海市自然科学基金(20ZR1437300);国防基础科研项目(JCKY20203B019)。

摘　　要：针对空间级硅橡胶与聚酰亚胺的粘结界面呈现低表面能、粘结可靠性差的现状,利用有机硅烷的润湿和键结作用对界面进行预处理,改善其粘结强度。通过FTIR、^(1)H-NMR和GC-MS分析,有机硅烷的主要成分中对粘结性能影响较大的是正硅酸丁酯和丙基三甲基硅氧烷,采用两种偶联剂对聚合物表面进行预处理,在聚合物间不同均相结构层通过硅烷相互扩散和互穿网络形成的分子桥可实现致密交联。力学试验表明,经有机硅烷对待粘结界面表面预处理,粘结构件的剪切强度值可达0.65 MPa;选择适当的有机硅烷作为附着力促进剂,利用其有机官能团、成膜性和交联性可提高粘结构件的可靠性。The bonding interface of space silicone rubber and polyimide exhibited low surface energy,which lead to destruction of sticky structural parts.In order to improve the bonding strength,the interface was pretreated with organosilane as adhesion promoter.The structure and composition of organosilane were analyzed by FTIR,^(1)H-NMR,and the shear strength performance tests were carried out to test the physical properties of the encapsulated materials treated with organosilane.The results showed that the main components of organosilanes had a great influence on the bonding properties of tetrabutoxysilane and glycidoxypropyl-trimethoxysilane.The surface of the polymer was pretreated with two silane coupling agents,and a molecular bridge was formed between the heterogeneous polymer layers by silane interdiffusion and interpenetrating networks to achieve dense cross-linking.The shear strength showed that the shear strength could reach 0.65MPa,and the failure modes were adhesion failure.Therefore,an appropriate silane coupling agent can be selected as the adhesion promoter,and the packaging reliability of the non-polar polymer can be improved by utilizing the organic functional group,film formability and crosslinkability.

关 键 词：表面改性 聚酰亚胺 粘结强度 硅烷偶联剂 硅橡胶 

分 类 号：TQ322[化学工程—合成树脂塑料工业]