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通过测试凝胶时间与温度的关系,得到乙烯基树脂的表观活化能并进行了分析。在粘度实验的基础上,依据双阿累尼乌斯方程建立了与之相吻合的流变模型。结果表明:乙烯基树脂的凝胶时间随温度升高而缩短,其表观活化能仅有3.04 kJ/mol。乙烯基树脂低粘度状态持续时间>30 min,符合树脂传递模塑成型工艺(VAR-TM)对树脂低粘度的要求。最终建立的粘度模型,可有效预测和模拟树脂体系在不同工艺条件下的粘度行为。
By measuring the relationship between gel time and temperature, the apparent activation energy of vinyl resin was obtained and analyzed. Based on the viscosity experiment, a rheological model was established based on the double Arrhenius equation. The results show that the gel time of vinyl resin shortens with the increase of temperature, and the apparent activation energy is only 3.04 kJ / mol. The low viscosity of the vinyl resin lasts for> 30 min, in line with the low resin viscosity requirements of the resin transfer molding process (VAR-TM). The resulting viscosity model can effectively predict and simulate the viscosity behavior of the resin system under different process conditions.