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非等温DSC研究Al/HTPB/TDI体系的固化反应动力学
Curing Kinetics of HTPB/TDI/Al System by Non-isothermal DSC
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中文摘要:
      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。
中文关键词: 高分子化学  铝粉  HTPB/TDI  差示扫描量热法  固化动力学
英文摘要:
      Curing processes of HTPB/TDI and Al/HTPB/TDI composites were measured by non-isothermal differential heating calorimetry at different scanning rates. Results show that the values of apparent activation energy,reaction order and frequency factor of HTPB/TDI system are 51.826 kJ·mol-1,0.926,2.412×105 min-1,respectively. After adding aluminum powder,the peak temperature of the curing process is decreased. The values of apparent activation energy,reaction order and frequency factor are increased to be 76.402 kJ·mol-1,0.944,2.53×108 min-1,respectively. The curing reaction mechanism of HTPB/TDI meets Avrami-Erofeev Equation G(α)=[-ln(1-α)]n. The addition of aluminum powder into HTPB/TDI curing system only makes little change on index n. The curing reaction of HTPB/TDI can be accelerated by aluminum powder for the initial 18% of reaction extent and aluminum powder slows down the curing reaction for the latter 82% of reaction extent.
英文关键词: polymer chemistry  aluminum powder  HTPB/TDI  DSC  curing kinetics
投稿日期:2008-08-26
最后修改日期:2008-10-20
网络出版日期:2011-11-04
书版出版日期:2009-02-25
引用文献:刘晶如,罗运军.非等温DSC研究Al/HTPB/TDI体系的固化反应动力学[J].含能材料,2009,17(1):83~86.LIU Jing-ru,LUO Yun-jun. Curing Kinetics of HTPB/TDI/Al System by Non-isothermal DSC[J]. Chinese Journal of Energetic Materials(Hanneng Cailiao),2009,17(1):83-86.
作者单位E-mail
刘晶如 江苏工业学院材料科学与工程学院,江苏 常州 213164 ruruliu1028@163.com 
罗运军 北京理工大学材料科学与工程学院,北京 100081  
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