非等温热重法测定聚酰胺酸纤维亚胺化动力学参数  

The calculation of dynamic parameters of polyamide acid fibers by non-isothermal thermogravimetry

作　　者：朱璇[1] 钱明球[2] 虞鑫海[3] 张幼维[1] 赵炯心[1] 

机构地区：[1]东华大学纤维材料改性国家重点实验室,上海201620 [2]中国石化仪征化纤股份有限公司研究院,江苏仪征211900 [3]东华大学化学化工与生物工程学院,上海201620

出　　处：《合成技术及应用》2013年第4期14-16,共3页Synthetic Technology & Application

摘　　要：二步法制备聚酰亚胺时,亚胺化过程至关重要,可使聚酰胺酸脱水成为聚酰亚胺。该文对三元共聚得到的聚酰胺酸溶液进行湿法纺丝后的纤维进行了亚胺化动力学参数的测定,采用非等温热重法得到聚酰胺酸TG曲线,根据Freeman-Carroll动力学算法求算得到其亚胺化反应级数为一级,活化能为47.56 kJ/mol,频率因子A的自然对数为10.23。When preparing polyimide by two-step method,imidization process is vital.The dynamic parameters of polyamide acid fibers which are prepared by wet spinning have been determined,and the TG curves are measured by non-isothermal thermogravimetry.According to Freeman-Carroll dynamics algorithm,it is found that the polyam-ide acid fibers have the reaction order of 1 ,activation energy of 47.56 kJ /mol and the natural logarithm frequency factor of 10.23.

关 键 词：聚酰胺酸 聚酰亚胺 热重法 亚胺化动力学 

分 类 号：TQ340.1[化学工程—化纤工业]