Study of improving Kapton resin

• Main Authors: Yu-Jie Tsai, 蔡宇傑
• Other Authors: S. Y. Tsay
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/92q73k

碩士 === 國立成功大學 === 化學工程學系碩博士班 === 92 === A series of copolyimides containing phenyl and hydroxyl pendant groups were synthesized from various ratios of two diamines with one aromatic tetracarboxylic dianhydride through thermal imidization process to determine the effect of 2,6-diamino-4-phenylphenol(DAPP) on the physical properties of polymers. The structures and physical properties of copolyimides were characterized by Ft-IR, DSC, TGA, Instron and dielectric analyzer. Copolyimides containing more than 40% DAPP were soluble in hot NMP, DMAc and DMF , and possessed high glass transition temperature (351.4~357.5oC), high initial modulus (3.81~3.93GPa). A segment of imide linkages were converted to benzoxazole linkages by decarboxylation at temperatures higher than 420oC under vacuum.Copolyimides were found to have better thermal stability, lower dielectric constant and lower moisture absorption and were insoluble in organic solvents after decarboxylation.