TBBPAER/DDM的固化反应动力学

用等温差示扫描量热法研究了4，4’-二氨基二苯甲烷固化四溴双酚-A环氧树脂的反应动力学，测定了固化反应热，得出了不同温度下固化反应速率与反应程度、固化反应程度与反应时间的关系曲线．结果表明等温固化反应按自催化反应机理进行，用Kamal方程较好地描述了不同温度下其固化反应的自催化反应过程，并反映出不同温度下扩散作用的差别，其动力学参数k1、k2、m、n由非线性回归法拟合而出，k1、k2对应的反应表现活化能分别为52．2kJ·mol-1和46．5kJ·mol-1。

Curing Kinetics of Tetrabromo-bisphenol-A Epoxy Resin with Diaminodiphenyl Methane

Kinetics of tetrabromo-bisphenol-A epoxy resin (TBBPAER ) cured with 4, 4'-(DDM) was studied by isothermal differential scanning calorimetry (DSC),The reaction heat of the curing reactions of TBBPAER/DDM was determined, and the curves of dα/dt αand α t at different temperatures were obtained. The results indicate that the mechanism of the isothermal curing reactions of TBBPAER/DDM follows autocatalytic reaction. The autocatalytic behavior can be well described by Kamal equation, meanwhile, the difference of the effect of diffusion on the reaction at different temperatures can be obviously shown, The kinetic parameters,k1,k2,m and n, were computed using the nonlinear regression technique. The apparent activation energies for k1,k2 are 52.2 KJ.mol-1 and 46.5 kJ'mol-1, respectively, The average values of m and n are 0.18 and 1.68, respectively.