乙烯基树脂后固化制度的优化研究

Study on the optimization of post-curing process of vinyl ester resin

采用DSC法研究了乙烯基树脂体系的固化动力学参数,并通过对该体系树脂浇铸体的固化度、力学性能、玻璃化转变温度的测试确定了最佳后固化制度。结果表明,该体系固化反应的表观活化能为56.27 kJ/mol,频率因子为4.96×107/s,反应级数为0.9;最佳后固化制度为100℃/1 h,此时固化度可达94.7%,弯曲强度可达102.6 MPa,拉伸强度可达64.1 MPa,玻璃化转变温度可达107.8℃。

The curing kinetics of vinyl ester resin was studied by DSC and the optimum post - curing process of the resin was determinated by the testings of curing degree, mechanical property and glass transition temperature of the resin castings. The results showed that the apparent activation energy, frequency factor and reaction order of the curing reaction were 56. 27 kJ/mol, 4.96 x 107/s and 0. 9, respectively. The optimum post - curing process was at 100 ℃ for 1 h and the curing degree, flexural strength, tensile strength and glass transition temperature were up to 94. 7% , 102. 6 MPa, 64. 1 MPa and 107.8 ℃, respectively.