Citation: Pei-jian Wang, Kai Wang, Ji-song Zhang, Guang-sheng Luo. Non-aqueous Suspension Polycondensation in NMP-CaCl2/Paraffin System ― A New Approach for the Preparation of Poly(p-phenylene terephthalamide)[J]. Chinese Journal of Polymer Science, ;2015, 33(4): 564-575. doi: 10.1007/s10118-015-1607-1 shu

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

1.
The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

Received Date: 11 July 2014
Revised Date: 2 September 2014

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. U1463208 and 91334201).

A non-aqueous suspension polycondensation method was proposed to proceed the reaction of p-phenylenediamine and terephthaloyl chloride for the preparation of poly(p-phenylene terephthalamide) (PPTA). The system was operated with NMP-CaCl2 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 HCl to promote the reaction, well-controlled temperature and low viscosity which means less energy cost.
- Poly(p-phenylene terephthalamide),
- Non-aqueous suspension polycondensation,
- Weight-average molecular weight,
- Microreactor,
- Microdroplets
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沈阳化工大学材料科学与工程学院沈阳 110142