氰酸酯树脂改性热固性丁苯树脂的固化及其动力学

Curing-Reaction and Kinetics of Cyanate Ester Resin Modified Thermosetting Butadiene-Styrene Resin

利用傅里叶变换红外光谱法(FT-IR)和差示扫描量热法(DSC)研究了氰酸酯树脂改性热固性丁苯树脂的固化反应特性及其动力学。以温度-升温速率外推法计算得到固化反应起始温度(Ti0)、峰顶温度(Tp0)和终止温度(Tf0)分别为414.2、444.54、60.6 K,对改性树脂的固化过程进行优化。采用Freeman-Carroll模型计算得出不同升温速率(β)下的反应级数和反应活化能,结果表明:当β<5 K/min时,固化反应级数和反应活化能分别为1.2和155.1 kJ/mol;当β≥5 K/min时,固化平均反应级数和反应活化能分别为2和188.7 kJ/mol。

The character and kinetics of curing reaction were studied by means of FT-IR and differential scanning calorimetry（DSC） for cyanate ester resin modified thermosetting butadiene-styrene resin.The extrapolating temperature-heating rate method was used to determine the initial temperature（T_（i0））,peak temperature（T_（p0）） and terminal temperature（T_（f0）） of the resin,which are 414.2,444.5 and 460.6 K,（respectively,） in（order） to optimize the curing process of the modified resin.The reaction order and the appa-（rent） activation（energy） with different scanning rates were estimated according to Freeman-Carroll＇s method.（Result shows） that while the scanning rate is less than 5 K/min,the（reaction） order and the apparent（activation） energy are 1.2 and 155.1 kJ/mol,respectively.While the scanning rate is equal to or greater than 5 K/min,reaction order and apparent activation energy are 2 and 188.7 kJ/mol,respectively.