Synthesis and properties of new aromatic poly-(ether benzoxazole)s from 2,2?-bis(4-amino-3-hydroxyphenoxy)biphenyl and aromatic dicarboxylic acid chlorides
| العنوان: | Synthesis and properties of new aromatic poly-(ether benzoxazole)s from 2,2?-bis(4-amino-3-hydroxyphenoxy)biphenyl and aromatic dicarboxylic acid chlorides |
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| المؤلفون: | Toshikazu Kurosaki, Yasumasa Maeda, Masa-aki Kakimoto, Ki Hong Park, Yoshio Imai, Hisashi Takeuchi |
| المصدر: | Journal of Polymer Science Part A: Polymer Chemistry. 40:2656-2662 |
| بيانات النشر: | Wiley, 2002. |
| سنة النشر: | 2002 |
| مصطلحات موضوعية: | chemistry.chemical_classification, Condensation polymer, Polymers and Plastics, Intramolecular reaction, Organic Chemistry, Diol, Ether, Benzoxazole, Methanesulfonic acid, chemistry.chemical_compound, Dicarboxylic acid, chemistry, Acyl chloride, Polymer chemistry, Materials Chemistry |
| الوصف: | A new bis(o-aminophenol) with a crank and twisted noncoplanar structure and ether linkages, 2,2'-bis(4-amino-3-hydroxyphenoxy)biphenyl, was synthesized by the reaction of 2-benzyloxy-4-fluoronitrobenzene with biphenyl-2,2'-diol, followed by reduction. Biphenyl-2,2'-diyl-containing aromatic poly(ether benzoxazole)s with inherent viscosities of 0.52-1.01 dL/g were obtained by a conventional two-step procedure involving the polycondensation of the bis(o-aminophenol) monomer with various aromatic dicarboxylic acid chlorides, yielding precursor poly(ether o-hydroxyamide)s, and subsequent thermal cyclodehydration. These new aromatic poly(ether benzoxazole)s were soluble in methanesulfonic acid, and some of them dissolved in m-cresol. The aromatic poly(ether benzoxazole)s had glass-transition temperatures of 190-251 °C and were stable up to 380 °C in nitrogen, with 10% weight losses being recorded above 520 °C. |
| تدمد: | 1099-0518 0887-624X |
| DOI: | 10.1002/pola.10360 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::d3debb901e273f4bf086f07b92a3e5c7 https://doi.org/10.1002/pola.10360 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........d3debb901e273f4bf086f07b92a3e5c7 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10990518 0887624X |
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| DOI: | 10.1002/pola.10360 |