论文部分内容阅读
以4,4’-二氨基二苯基砜(4,4’-DDS)与对苯二甲酰氯(TPC)为单体,通过低温溶液缩聚反应合成一系列不同黏度的聚对苯二甲酰对氨基苯砜。并用IR、1H-NMR、DSC、TG、电子万能实验机等对其结构和性能进行了表征和测试。实验结果表明:温度保持在-15℃,溶液质量浓度为6%时,所聚合物特性黏度最高。随着特性黏度的逐渐增大,聚对苯二甲酰对氨基苯砜的溶解性变差,玻璃化温度(Tg),热分解温度(Td)升高。弹性模量、拉伸强度等力学性能也逐渐增大。
A series of poly (p-phenylene terephthalate) with different viscosity were synthesized by the polycondensation of 4,4’-diaminodiphenyl sulfone (4,4’-DDS) and terephthaloyl chloride (TPC) P-aminophenyl sulfone. Its structure and properties were characterized and tested by IR, 1H-NMR, DSC, TG, electronic universal testing machine. The experimental results show that when the temperature is -15 ℃ and the solution concentration is 6%, the intrinsic viscosity of the polymer is the highest. With the gradual increase of intrinsic viscosity, the solubility of poly (p-phenylene terephthalamide) becomes worse and the glass transition temperature (Tg) and thermal decomposition temperature (Td) increase. Mechanical properties such as elastic modulus and tensile strength also increase gradually.