Synthesis and Proerties of Soluble Aromatic Polyamide-imides with Pendent Side Chain Structure

• Main Authors: Ming-Han Chiang, 蔣明瀚
• Other Authors: Yu-Wen Wu
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/ft2ab3

碩士 === 義守大學 === 化學工程學系暨生物技術與化學工程研究所 === 106 === In this study, 4-fluoronitrobenzene and 4-tert-butylaniline were used to synthesize dinitrotriphenylamine monomer containing tert-butyl group. This monomer was hydrogenation by hydrazine to form diaminotriphenylamine. The dicarboxylic acid monomers were synthesized by different aromatic diamines and benzene trimellitic anhydride (TMA). These monomers were reacted with a different aromatic diamines in the NMP solution which containing calcium chloride; then the direct condensation polymerization method was used to synthesize a series of polyamide-imide polymers, and triphenyl phosphite and pyridine as the condensing agents. The physical properties of polyamide-imides as following: the intrinsic viscosity is 0.62 ~ 0.82 dL / g, the solubility was good in polar solvents such as NMP, DMF and DMAc, the thermal properties, the glass transition temperature is between 178 ~ 257℃ as measured by DSC, and the temperature of 5% weight loss were between 273 ~ 446℃ under nitrogen atmosphere. The changes in physical properties of polymers were tried to rationalized in term of the structures of the polymers.