尼龙612/6共聚物热降解动力学的研究  

Study on Thermal Degradation Kinetics of Nylon 612/6 Copolymer

作　　者：产文涛 曲希明[2] 俞昊[1] 姜锋[2] 于春晓[2] Chan Wentao;Qu Ximing;Yu Hao;Jiang Feng;Yu Chunxiao(State Key Laboratory for Modification of Chemical Fiber and Polymer Materials,College of Materials Science and Engineering,Donghua University.Shanghai 201620,China;State Key Laboratory of Biobased Fiber Manufacturing Technology,China Textile Academy,Beijing 100025,China)

机构地区：[1]东华大学材料科学与工程学院,纤维材料改性国家重点实验室,上海201620 [2]中国纺织科学研究院,生物源纤维制造技术国家重点实验室,北京100025

出　　处：《塑料科技》2019年第10期6-11,共6页Plastics Science and Technology

摘　　要：使用热重分析仪研究了尼龙612/6共聚物在氮气氛围中不同升温速率下的热降解动力学,结果表明:尼龙612/6共聚物在N2中的热降解过程为一步反应,降解温度随升温速率的增大而线性升高。其特征热降解温度Tf^0=478.09℃、Tp^0=467.10℃、平衡降解温度T0^0=445.17℃。通过Kissinger方程、Flynn-Wall-Ozawa方程求得热降解反应的活化能分别为238.86、225.46 kJ/mol;指前因子lnA=31.20;使用Coats-Redfern方程计算得出不同升温速率下平均热降解活化能为228.36 kJ/mol,指前因子lnA为28.65,其接近于R2分解机理并证明了尼龙612/6的热降解过程为球形生长,相边界反应,减速型降解曲线。The thermal degradation kinetics of nylon 612/6 copolymer under different heating rates in nitrogen atmosphere was studied by thermogravimetric analyzer.The results show that the thermal degradation process of nylon 612/6 copolymer in N2 is a one-step reaction and the degradation temperature increases linearly with the increases of heating rate.Its characteristic thermal degradation temperature is Tf^0=478.09℃,Tp^0=467.10℃,and equilibrium degradation temperature T0^0=445.17℃.The activation energies of the thermal degradation reaction were obtained by the Kissinger equation and the Flynn-Wall-Ozawa equation,respectively,being 238.86 and 225.46 kJ/mol;the pre-exponential factor lnA=31.20;the average thermal degradation activation at different heating rates was calculated by the Coats-Redfern equation.The energy is 228.36 kJ/mol,and the pre-exponential factor InA is 28.65,which is close to the decomposition mechanism of R2 and proves that the thermal degradation reaction of nylon 612/6 is spherical growth,and the phase boundary reaction deceleration degradation curve.

关 键 词：尼龙612/6 热降解动力学 热重分析仪 活化能 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]