Synthesis and Characterization of New Polyimides with Hydroxyl Groups

• Main Authors: Chiang, Chi-Hung, 江啟宏
• Other Authors: Chern, YAW-Terng
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/51965354782052186632

碩士 === 國立臺灣科技大學 === 化學工程系 === 93 === A series of new polyimides, containing pendant hydroxyl groups were prepared via the solution polycondensation of various aromatic dianhydri- de with 1,1-bis(4-(2-hydroxy-4-aminophenoxy)phenyl)-1-phenyl-2,2,2- fluoroethane. The inherent viscosities, solubility properties, thermal properties and dynamic mechanical properties of the polyimides were investigated. First, the polyimides derived from 1,1-bis(4-(2-hydroxy-4-aminophen- oxy)phenyl)-1-phenyl-2,2,2-trifluoroethane, had inherent viscosities of 0.48～0.83 dL/g. The obtained polyimides were readily soluble in N,N'-Dimethylformamide (NMP) , N,N'-Dimethylacetamide (DMAc), m-cresol, o-chlorophenol, Tetrahydrofuran (THF) and cyclohexanone. The differential scanning calorimeter (DSC) and dynamic mechanical analysis (DMA) reveals that the glass transition temperatures ranged on 261～315℃ and 284～333℃, respectively. In addition, the temperatures of 10％ weight loss in air and nitrogen ranged on 465～486℃ and 438～449℃, respectively. The polymer films had tensile strengths of 92～155 MPa, and elongation to breakage values of 7.6～17.5％.