Two-dimensional ATR-FTIR Spectroscopic Study on the Water Diffusion Behavior in Polyimide/Silica Nanocomposite  

作　　者：沈怡[1] 王海涛[1] 钟伟[1] 武培怡[1] 

机构地区：[1]复旦大学高分子科学系聚合物分子工程教育部重点实验室,上海200433

出　　处：《Chinese Journal of Chemical Physics》2006年第6期481-484,共4页化学物理学报（英文）

基　　金：supported by the National Natural Science Foundation of China(No.20573022,No.20425415);the National Basic Research Pro-gram of China(2005CB623800),the PHD Program of M0E(20050246010);the"Qimingxing"Project(No.04QM1402)of Shanghai Municipal Science and Technology Commission,and the"Shuguang"Project(No.01SG05)of the Shanghai Municipal Education Commission and Shanghai Education Development Foundation.

摘　　要：To consider the reliability and performance of electronic devices based on polyimide derivatives, dynamic water sorption and diffusion behavior in a polyimide derivative： poly（4＇4 oxydiphenylene pyromellitimide） （PMDA-ODA）/silica nanocomposite was investigated by two-dimensional ATR-FTIR spectroscopy, by which three states of water molecules owning different H-bonding strength were distinguished. The amounts and strength of H-bonding also played a significant role in determining the diffusion rate of the different states of water molecules. The type of aggregated water molecules which also formed H-bonding with silicic acid （residues） or polyimide system was the last one diffusing to the polymer side in contact with the ATR crystal element because the polymeric matrix blocked their diffusion to a great extent. The diffusion coefficient was also estimated to gain the information of the dynamic diffusion behavior.

关 键 词：Two-dimensional ATR-FTIR spectroscopy Polyimide/silica nanocomposite H-BONDING 

分 类 号：O[理学]