丙烯酸化环状磷腈/环氧丙烯酸酯光固化体系热降解动力学研究

以TGA为手段, 进行了丙烯酸化环状磷腈/环氧丙烯酸酯光固化体系热降解动力学的研究, 同时与加入粉末状环状磷腈混合体系进行了对照. 采用Kissinger, Flynn-Wall-Ozawa和Friedman三种方法计算了固化膜降解反应活化能, 证明了磷腈结构的引入, 使得体系在高温阶段的活化能有所提高, 表明降解变得困难, 热稳定性得到提高. 而反应型丙烯酸化环状磷腈相对粉末状环状磷腈混合体系具有更高的降解活化能.

Kinetics Study of Thermal Degradation of UV-Cured Cyclophosphazene/Epoxy Acrylate Blends

Acrylated cyclophosphazene was used as a flame retardant to blend with commercial UV-curable epoxy acrylate EB600. The kinetics of thermal degradation of the UV-cured product was studied by thermogravimetric analysis at different heating rates in comparison with that to use cyclophosphazene powder in place of the acrylated one. The activation energies and correlation coefficients were calculated by Kissinger, Flynn-Wall-Ozawa and Friedman methods. It has been shown that the addition of cyclophosphazene increased the activation energies of blend systems at high temperature, improved the thermal stability and made the thermal degradation more difficult. Moreover, the acrylated cyclophosphazene film has higher activation energy than that containing cyclophosphazene powder.