https://scholars.lib.ntu.edu.tw/handle/123456789/467446
標題: | Preparation and properties of new soluble aromatic polyamides from 2,2′-bis(4-aminophenyl)biphenyl and aromatic dicarboxylic acids | 作者: | Liou, C.-S. Maruyama, M. Kakimoto, M.-A. Imai, Y. GUEY-SHENG LIOU |
關鍵字: | 2,2′-bis(4-aminophenyl)biphenyl; Aromatic polyamides; Solubility; Thermal behavior | 公開日期: | 1998 | 卷: | 36 | 期: | 12 | 起(迄)頁: | 2029-2035 | 來源出版物: | Journal of Polymer Science, Part A: Polymer Chemistry | 摘要: | New biphenyl-2,2′-diyl-containing aromatic polyamides having a crank and twisted noncoplannar structure were synthesized in inherent viscosities of 0.39-1.42 dL/g by the low-temperature solution polycondensation of 2,2′-bis(4-aminophenyl)biphenyl, prepared in four steps starting from 2-aminobiphenyl, with various aromatic dicarboxylic acid chlorides. These polyamides were readily soluble in a variety of solvents including N,N-dimethylacetamide, N-methyl-2-pyrrolidone (NMP), m-cresol, and pyridine. Transparent, pale-yellow, and flexible films could be cast from the NMP solutions of the polyamides. The aromatic polyamides had glass transition temperatures in the range of 284-320°C, and began to lose weight around 400°C, with 10% weight loss being recorded at about 500°C in air. © 1998 John Wiley & Sons, Inc. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/467446 | ISSN: | 0887624X | DOI: | 10.1002/(SICI)1099-0518(19980915)36:12<2029 | SDG/關鍵字: | Aromatic polymers; Chlorine compounds; Glass transition; Polycondensation; Solubility; Solvents; Structure (composition); Synthesis (chemical); Temperature; Thermodynamic properties; Viscosity; Aromatic dicarboxylic acid chloride; Noncoplanar structure; Polyamides |
顯示於: | 高分子科學與工程學研究所 |
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