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首页> 外文期刊>Journal of Applied Polymer Science >A New Method to Predict Optimum Cure Time of Rubber Compound Using Dynamic Mechanical Analysis
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A New Method to Predict Optimum Cure Time of Rubber Compound Using Dynamic Mechanical Analysis

机译：动态力学分析预测胶料最佳固化时间的新方法

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摘要

The degree of vulcanization of a rubber compound has a big influence on the properties of the final product. Therefore, precisely defining the curing process including optimum cure time is important to ensure the production of final products having high performance. Typically, vulcanization is represented using vulcanization curves. The main types of equipment used for producing vulcanization curves are the oscillating disc rheometer (ODR) and the moving die rheometer (MDR). These can be used to plot graphs of torque versus time at a constant temperature to show how cure is proceeding. Based on the results obtained, optimum cure time (t_(90)) is calculated as the time required for the torque to reach 90% of the maximum achievable torque. In this study, the use of Dynamic Mechanical Analysis (DMA) for assessment of t_(90) was assessed. DMA was carried out using shear mode isothermal tests to measure the changes in material properties caused by vulcanization. The results revealed that the shear storage modulus (G'), shear loss modulus (G"), and tan δ all reflect the vulcanization process, however, tan δ gave the best representation of level of vulcanization. Indeed, the curve of tan δ was able to be used to derive the t90 for rubber compounds and showed good agreement with the results from an MDR.
机译：橡胶混合物的硫化程度对最终产品的性能影响很大。因此，精确定义包括最佳固化时间的固化过程对于确保生产具有高性能的最终产品很重要。通常，使用硫化曲线表示硫化。用于产生硫化曲线的主要设备类型是振动盘流变仪（ODR）和动模流变仪（MDR）。这些可用于在恒定温度下绘制扭矩与时间的关系图，以显示固化过程。根据获得的结果，计算最佳固化时间（t_（90））作为扭矩达到最大可达到扭矩的90％所需的时间。在这项研究中，使用动态力学分析（DMA）评估t_（90）。使用剪切模式等温测试进行DMA，以测量硫化引起的材料性能变化。结果表明，剪切储能模量（G'），剪切损耗模量（G“）和tanδ均反映了硫化过程，但tanδ表现出最佳的硫化水平。实际上，tanδ曲线可以用于推导橡胶化合物的t90，并且与MDR的结果显示出很好的一致性。

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