时间-温度-转变(TTT)图是分析和设计固化过程的有用工具,具有重要的研究价值。传统的TTT图中等固化曲线族的绘制是一个繁琐的过程,耗费大量的成本和时间。温度-时间-固化度三者之间的关系是由固化动力学方程控制的,因此从固化动力学方程入手,采用数值模拟的方法研究等固化曲线族是一种省时省力的新方法。针对两种树脂的固化动力学模型,数值模拟了树脂的固化度,并对计算方案进行了验证。在此基础上,分别做出树脂固化动力学模型的等固化曲线图,探讨了温度-时间-固化度之间的关系,结果表明:在等固化条件下温度和时间的对数之间存在线性关系。在此基础上对温度-时间-固化度曲线进行拟合,得到了较为简单的关系式,简化了原先复杂的固化动力学方程,能够方便地用于工程实际,避免了繁琐的求解。
Temperature-time-transition (TTT) diagram is a useful tool for analyzing and designing the curing process, which has an important research value. The traditional iso-conversional curves draw- ing process in TTT diagram is a complicated process which is time consuming and costly. The rela- tionship of temperature, time and degree of cure is controlled by the curing kinetic equation. From the perspective of the curing kinetic equation, studying the iso-conversional curves with the numerical simulation method is a novel method which can reduce both time and cost. For two kinds of resin cu- ring kinetics models, the resin degree of cure is simulated, and the simulation program has been veri- fied. Based on this work, the iso-conversional curves of two kinetic models are plotted and the rela- tionship of the temperature, time and degree of cure is discussed. The result shows that a negative linear relationship exists between the temperature and the logarithm of the time. Then by curve fitting method a relatively simple relationship of the iso-conversional curves is obtained which can be used more conveniently in engineering practice without cumbersome computation.