Non-aqueous Suspension Polycondensation in NMP-CaCl2/Paraffin System—A New Approach for the Preparation of Poly（p-phenylene terephthalamide）

A non-aqueous suspension polycondensation method was proposed to proceed the reaction ofp-phenylenediamine and terephthaloyl chloride for the preparation of poly（p-phenylene terephthalamide） （PPTA）. The system was operated with NMP-CaCI2 solution as the dispersed phase and inert liquid paraffin as t...

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Bibliographic Details
Published in:高分子科学：英文版 2015 (4), p.564-575
Main Author: Pei-jian Wang Kai Wang Ji-song Zhang Guang-sheng Luo
Format: Article
Language:English
Subjects:
CaCl2溶液
亚苯基
制备
对苯二甲酰胺
氯化钙
水悬浮
液体石蜡
系统
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Summary:A non-aqueous suspension polycondensation method was proposed to proceed the reaction ofp-phenylenediamine and terephthaloyl chloride for the preparation of poly（p-phenylene terephthalamide） （PPTA）. The system was operated with NMP-CaCI2 solution as the dispersed phase and inert liquid paraffin as the continuous phase. Each of NMP-CaCl2 solution microdroplet suspended in paraffin served as a microreactor where the polycondensation took place. According to the results of TGA, XRD, IR, SEM and EA, PPTA with good quality was obtained through this novel method, and a number of main factors influencing this process were investigated to determine the optimum condition for the preparation of PPTA. Besides, this two-phase polycondensation system brings many unique advantages compared to the conventional solution polycondensation method, including a sealed reaction environment keeping the reactants away from oxygen and water, easy removal of HCI to promote the reaction, well-controlled temperature and low viscosity which means less energy cost.
ISSN:0256-7679
1439-6203