尼龙6/11共聚物的非等温结晶动力学研究

以尼龙11预聚物和尼龙6预聚物为原料,采用熔融聚合的方法制备了尼龙6/11共聚物.利用差示量热扫描热分析仪(Differential Scanning Calorimetry,DSC)研究了尼龙6/11共聚物的非等温结晶过程,用经Jeziorny修正的Avrami方程对其非等温结晶动力学进行了研究,计算并得到非等温结晶动力学参数.结果表明:该方程适合于处理尼龙6/11共聚物的非等温结晶过程.在尼龙6/11共聚物非等温结晶过程中,在其初期结晶阶段可能同时包含了均相成核和异相成核,在二次结晶阶段结晶生长可能是一维生长;此外,还利用Kissinger方法求得尼龙6/11共聚物非等温结晶的结晶活化能为-201.76 kJ/mol.

Investigation on Nonisothermal Crystallization Kinetics of Nylon 6/11 Copolymer

Nylon 6/11 copolymer was prepared by melting polycondensation polymerization of pre-polyamide 11 and pre-polyamide 6.The nonisothermal crystallization behaviors of nylon 6/11 copolymer were investigated by differential scanning calorimetry(DSC).And its nonisothermal crystallization kinetics was studied by the Avrami equations modified by Jeziorny,and some important parameters were calculated.The results show that the above equation can describe the nonisothermal crystallization of nylon 6/11 copolymer well.At primary crystallization stage,there are heterogeneous and homogeneous nucleations during crystallization.In the secondary crystallization stage,the growth is one-dimensional mode.Additionally, the activation energy of nonisothermal crystallization for nylon 6/11 copolymer obtained from Kissinger method is-201.76 kJ/mol.