The curing process of dendritic polymer PAMAM with bis-phenol A epoxy resin was investigated using isothermal differential scanning calorimetry（DSC）,the mechanism of this reaction was autocatalytic.The data of two r...The curing process of dendritic polymer PAMAM with bis-phenol A epoxy resin was investigated using isothermal differential scanning calorimetry（DSC）,the mechanism of this reaction was autocatalytic.The data of two reaction rate constants k1,k2 and reaction orders m,n were obtained from Kamal equation.The overall reaction order m+n was between 2.07 and 2.29,the apparent activation energies of E1 and E2 were 59.79 kJ/mol and 56.51 kJ/mol, respectively.The reaction entered into a diffusion controlled stage at the conversion of 50%,experimental data and theoretic curve had deviation at this time.The reaction conversion,at which the deviation occurred,decreased with lowering curing temperature.展开更多
通过合理假设,从谢苗诺夫(Semenov)热爆炸理论和8个非等温动力学方程,导出了估算含能材料(EMs)热爆炸临界温度(Tb)的2个通式和它们的6个派生式。从EMs的非等温DSC曲线可获得DSC曲线偏离基线的起始温度(T0)、onset温度(Tei)和放热分解反...通过合理假设,从谢苗诺夫(Semenov)热爆炸理论和8个非等温动力学方程,导出了估算含能材料(EMs)热爆炸临界温度(Tb)的2个通式和它们的6个派生式。从EMs的非等温DSC曲线可获得DSC曲线偏离基线的起始温度(T0)、onset温度(Tei)和放热分解反应的动力学参数。由方程T0ior ei=T00 or e0+a1βi+a2βi2+…+aL-2βiL-2,i=1,2,…,L可得到T00和Te0值,随后用6个派生式可计算Tb值。对1,4,5,8-四硝基-1,4,5,8-四氮杂双呋咱[3,4-c:3′,4′-h]十氢化萘,1,4,5,8-四氮杂双呋咱[3,4-c:3′,4′-h]十氢化萘,1,3,4-三硝基咪唑烷酮[4,5-b]呋咱[3,4-e]哌嗪,咪唑烷酮[4,5-b]呋咱[3,4-e]哌嗪,1,3,4,8-四硝基咪唑烷酮[4,5-b]呋咱[3,4-e]哌嗪,1,4,5,8-四硝基-1,4,5,8-四氮杂萘呋咱[3,4-b]十氢化萘,1,3,5-三硝基-1,3,5-三氮杂呋咱[3,4-f]环庚烷,由6个派生式所得的Tb值甚接近。展开更多
文摘The curing process of dendritic polymer PAMAM with bis-phenol A epoxy resin was investigated using isothermal differential scanning calorimetry（DSC）,the mechanism of this reaction was autocatalytic.The data of two reaction rate constants k1,k2 and reaction orders m,n were obtained from Kamal equation.The overall reaction order m+n was between 2.07 and 2.29,the apparent activation energies of E1 and E2 were 59.79 kJ/mol and 56.51 kJ/mol, respectively.The reaction entered into a diffusion controlled stage at the conversion of 50%,experimental data and theoretic curve had deviation at this time.The reaction conversion,at which the deviation occurred,decreased with lowering curing temperature.
基金National Natural Science Foundation of China(No.20573098)Science and Technology Foundation of the National Defence Key Laboratory of Propellant and Explosive Combustion of China(9140C3501050701)
文摘通过合理假设,从谢苗诺夫(Semenov)热爆炸理论和8个非等温动力学方程,导出了估算含能材料(EMs)热爆炸临界温度(Tb)的2个通式和它们的6个派生式。从EMs的非等温DSC曲线可获得DSC曲线偏离基线的起始温度(T0)、onset温度(Tei)和放热分解反应的动力学参数。由方程T0ior ei=T00 or e0+a1βi+a2βi2+…+aL-2βiL-2,i=1,2,…,L可得到T00和Te0值,随后用6个派生式可计算Tb值。对1,4,5,8-四硝基-1,4,5,8-四氮杂双呋咱[3,4-c:3′,4′-h]十氢化萘,1,4,5,8-四氮杂双呋咱[3,4-c:3′,4′-h]十氢化萘,1,3,4-三硝基咪唑烷酮[4,5-b]呋咱[3,4-e]哌嗪,咪唑烷酮[4,5-b]呋咱[3,4-e]哌嗪,1,3,4,8-四硝基咪唑烷酮[4,5-b]呋咱[3,4-e]哌嗪,1,4,5,8-四硝基-1,4,5,8-四氮杂萘呋咱[3,4-b]十氢化萘,1,3,5-三硝基-1,3,5-三氮杂呋咱[3,4-f]环庚烷,由6个派生式所得的Tb值甚接近。
