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Curing Kinetics of HTPB/TDI/Al System by Non-isothermal DSC
Author(s): 
Pages: 83-86
Year: Issue:  1
Journal: Chinese Journal of Energetic Materials

Keyword:  高分子化学铝粉HTPB/TDI差示扫描量热法固化动力学;
Abstract: 采用非等温差示扫描量热法(DSC)研究了铝粉对端羟基聚丁二烯/甲苯二异氰酸酯体系(HTPB/TDI)固化反应动力学的影响.结果表明,HTPB/TDI体系的固化反应表观活化能约为51.826 kJ·mol-1,反应级数为0.926,指前因子为2.412×105 min-1; 加入铝粉后,体系的固化峰温降低,表观活化能、反应级数和指前因子分别提高至76.402 kJ·mol-1、0.944、2.53×108 min-1,机理函数仍遵循Avrami-Erofeev方程G(α)=[-ln(1-α)]n,只是方程中的指数n有所变化.铝粉对HTPB/TDI固化反应的影响表现为在反应程度18%前起加速作用,18%后起延缓作用.浅析了铝粉影响HTPB/TDI体系固化的原因.
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