三苯基膦催化环氧-酚醛树脂的固化反应研究

Study on cure reaction of epoxy-phenolic aldehyde resin catalyzed by triphenylphosphine

利用示差扫描量热仪在等温和动态条件下,对在三苯基膦催化作用下环氧树脂NC—3000L和酚醛树脂xy—lok体系的固化反应进行了研究。结果表明,在固化度低于80%时,体系的固化反应符合Kamal自催化动力学模型;随着反应程度的进一步提高,固化度高于80%时,固化反应由化学动力学控制转变为以扩散控制为主。分别建立了该固化体系在固化度为80%前后的反应动力学方程。体系在动态固化时的反应活化能为75.04kJ/mol。

The cure reaction of epoxy NC-3000L and phenolic aldehyde resin xy-lok system resin catalyzed by triphenylphosphine was studied in both isothermal and dynamic conditions by means of differential scanning calorimeter （DSC）. The results show that before the cure extent of 80%, the cure reaction is controlled by chemical kinetics and accords with Kamal selfcatalytic kinetical model. When the cure extent is beyond 80%, the cure reaction alters to diffusion controlling as main mode. The equations of cure reactive kinetics before and after 80% of the cure exetnt are established, respectively. The activity energy of the reaction under dynamic cure condition is 75.04 kJ/mol, which is obtained by Ozawa method.