The Pyrolysis Behavior of Modified Poly-m-phenylene Terephthalamide by 4, 4'-diamino Diphenyl Sulfone

2nd International Conference on Materials Science, Energy Technology and Environmental Engineering

材料科学;能源学;生态环境科学

Wang, L.^1 ; Wang, M.^1 ; Zhang, Y.W.^1 ; Zhao, J.X.^1 ; Hu, Z.M.^1 ; Wang, X.F.^2

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Shanghai, China^1

Tanlon Fiber Co., Shanghai, China^2

关键词: Decomposition process;    Elementary reaction;    Low temperatures;    M phenylenediamine;    N , N-dimethylacetamide;    Overall reactions;    Ozawa-Flynn-Wall method;    Thermal decomposition temperature;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/81/1/012030/pdf
DOI  :  10.1088/1755-1315/81/1/012030

来源: IOP

【 摘 要 】

The modified Poly-m-phenylene terephthalamide (co-PMTA3) was prepared by polycondensa-tion of m-Phenylenediamine, 4, 4-diamino diphenyl sulfone and terephthaloyl dichloride with a mole ratio of 3:1:4 in N, N-dimethylacetamide at low temperature. co-PMTA3 was soluble and expected to transform into fiber. The heat-resistance and thermal stability of co-PMTA3 were investigated by differential scanning calorimetry and thermogravimetric analysis, respectively. The results indicate that the co-PMTA3 possesses excellent heatresistance and thermal stability with a glass transition temperature of 318.4 °C, initial thermal decomposition temperatures of 404.0 °C in air and 445.5 °C in nitrogen. In addition, the active energy (Ea) of the decomposition process in air atmosphere was estimated by Ozawa-Flynn-Wall method which was be-tween 116.2 and 315.6 kJ/mol. The results indicate that the decomposition of co-PMTA3 air atmosphere is an overall reaction of multi elementary reactions.