Preparation and Properties of Imidazole-containing Polyimide/Silica Hybrid Films  

作　　者：MA Xiaoye MA Xiaofei QIU Xuepeng LIU Fangfang JIN Rizhe KANG Chuanqing GUO Haiquan GAO Lianxun 

机构地区：[1]Polymer Composite Engineering Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China," [2]CAST- Xi 'an Institute of Space Radio Technology, China Academy of Space Technology, Xi' an 710000, P. R. China

出　　处：《Chemical Research in Chinese Universities》2014年第6期1047-1050,共4页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China（No.2 1104085）, the National High Technology Research and Development Program of China（No.2012AA03A211） and the Major State Basic Research Development Program of China （No.2014CB643603）.

摘　　要：Imidazole-containing polyimide/silica（PI/SiO2） hybrid films were prepared from 3,3＇,4,4＇-biphenyltetra- carboxylic dianhydride（BPDA） and 2,2＇-di（p-aminophenyl）-5,5＇-bibenzimidazole in N,N-dimethylacetamide（DMAc） by sol-gel method and thermal imidization. The hybrid film with high silica mass fraction up to 40% was transparent. Scanning electron microscope（SEM） and transmission electron microscope（TEM） results of the film indicate a ho- mogeneous dispersion of silica nanoparticles in the polyimide matrix. One hybrid film PI/SiO2 with 15% SiO2 exhi- bits better mechanical properties with a tensile strength of 222 MPa, an elongation at break of 12%, and a tensile modulus of 5.66 GPa. The reinforced mechanism on mechanical Drooerties was also studied.Imidazole-containing polyimide/silica（PI/SiO2） hybrid films were prepared from 3,3＇,4,4＇-biphenyltetra- carboxylic dianhydride（BPDA） and 2,2＇-di（p-aminophenyl）-5,5＇-bibenzimidazole in N,N-dimethylacetamide（DMAc） by sol-gel method and thermal imidization. The hybrid film with high silica mass fraction up to 40% was transparent. Scanning electron microscope（SEM） and transmission electron microscope（TEM） results of the film indicate a ho- mogeneous dispersion of silica nanoparticles in the polyimide matrix. One hybrid film PI/SiO2 with 15% SiO2 exhi- bits better mechanical properties with a tensile strength of 222 MPa, an elongation at break of 12%, and a tensile modulus of 5.66 GPa. The reinforced mechanism on mechanical Drooerties was also studied.

关 键 词：POLYIMIDE Silica BENZIMIDAZOLE Sol-gel method 

分 类 号：TQ323.7[化学工程—合成树脂塑料工业] TB383[一般工业技术—材料科学与工程]