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首页> 外文期刊>Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems >COMPARATIVE STUDIES ON THE NON-ISOTHERMAL DSC CURING KINETICS OF AN UNSATURATED POLYESTER RESIN USING FREE RADICALS AND EMPIRICAL MODELS
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COMPARATIVE STUDIES ON THE NON-ISOTHERMAL DSC CURING KINETICS OF AN UNSATURATED POLYESTER RESIN USING FREE RADICALS AND EMPIRICAL MODELS

机译：自由基和经验模型对非饱和聚酯树脂非等温DSC固化动力学的比较研究

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In this paper, we study the kinetics of the curing of an unsaturated polyester resin initiated with MEKP by means of DSC. DSC runs were performed at different heating rates. The experimental curves were fitted using two kinetic models: one involving the concept of free-radical polymerization, and the other an empirical model that does not take into account the different steps involved in the curing. A computer program was developed to find the parameters involved in each kinetic model. The calculation algorithm uses the Runge-Kutta numerical integration and the ''downhill simplex method''. The experimental data are very well fitted by using both models. The activation energy values are in concordance with the values tabulated by Odian. In the model theoretical calculation, it is useful to know the decomposition rate constant of the initiator. We determined the decomposition constant by using two different methods. Both methods give similar values of the activation energy Ed and they are in agreement with those tabulated in the literature. (C) 1997 Elsevier Science B.V. [References: 37]
机译：在本文中，我们通过DSC研究了用MEKP引发的不饱和聚酯树脂固化的动力学。 DSC运行在不同的加热速率下进行。使用两个动力学模型拟合实验曲线：一个动力学模型涉及自由基聚合的概念，另一个动力学模型不考虑固化涉及的不同步骤。开发了计算机程序以查找每个动力学模型中涉及的参数。该计算算法使用Runge-Kutta数值积分和“下坡单纯形法”。通过使用这两种模型，实验数据非常吻合。活化能值与Odian列出的值一致。在模型理论计算中，了解引发剂的分解速率常数非常有用。我们使用两种不同的方法确定分解常数。两种方法都给出了相似的活化能Ed值，并且与文献中列出的方法一致。 （C）1997 Elsevier Science B.V. [参考：37]

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