【摘要】 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。更多还原

【Abstract】 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 drawing process in TTT diagram is a complicated process which is time consuming and costly.The relationship 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 curing kinetics models,the resin degree of cure is simulated,and the simulation program has been verified.Based on this work,the iso-conversional curves of two kinetic models are plotted and the relationship 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.更多还原