摘要
采用低温溶液缩聚法将对苯二甲酰氯(TPC)和邻氯对苯二胺(Cl-PPD)在N-甲基吡咯烷酮(NMP)/助溶剂体系中进行缩聚反应,制备了较高相对分子质量的含氯对位芳香族聚酰胺(ClPPTA)树脂,并用傅里叶变换红外光谱对Cl-PPTA分子结构进行了表征.研究了Cl-PPD浓度、初始反应温度、助溶剂加入量、TPC和Cl-PPD的单体摩尔比、反应时间等因素对Cl-PPTA比浓对数黏度的影响,获得了较优的聚合条件.结果发现,NMP/LiCl体系相对于NMP/CaCl2体系更易获得相对分子质量较高的Cl-PPTA,最佳条件下可制得比浓对数黏度达2.38dL/g的Cl-PPTA.
Chlorinated poly(para-phenylene terephthanlamide)(Cl-PPTA) with relatively high molecular weight was synthesized by low-temperature solution polycondensation between 2-chloro-1,4-diaminobenzene(Cl-PPD)and terephthaloyl chloride(TPC)in N-methyl-2-pyrrolidone(NMP)/consolvent system.The molecular structure of Cl-PPTA was characterized by Fourier transform infrared spectroscopy(FTIR).The effects of the concentration of Cl-PPD,initial reaction temperature,cosolvent content,molar ratio of TPC to Cl-PPD and reaction time on the inherent viscosity of Cl-PPTA were investigated.The optimum polymerization conditions were obtained.The results show that it is much easier to get higher molecular weight of Cl-PPTA in NMP/LiCl system than that in NMP/CaCl2 system.The Cl-PPTA with inherent viscosity of 2.38 dL/g can be produced under the optimum condition.
出处
《东华大学学报(自然科学版)》
CAS
CSCD
北大核心
2016年第1期1-5,共5页
Journal of Donghua University(Natural Science)
基金
国家重点基础研究发展计划(973)资助项目(2011CB606103)
国家高技术研究发展计划(863)资助项目(2012AA03212)
关键词
含氯对位芳香族聚酰胺
低温溶液缩聚法
合成
比浓对数黏度
chlorinated poly(para-phenylene terephthanlamide)
low-temperature solution polycondensation
synthesis
inherent viscosity