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A new approach for kinetic modeling and optimization of rubber molding
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2021-01-16 , DOI: 10.1002/pen.25636 Oskar Bera 1 , Jelena Pavličević 1 , Bojana Ikonić 1 , Jelena Lubura 1 , Dragan Govedarica 1 , Predrag Kojić 1
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2021-01-16 , DOI: 10.1002/pen.25636 Oskar Bera 1 , Jelena Pavličević 1 , Bojana Ikonić 1 , Jelena Lubura 1 , Dragan Govedarica 1 , Predrag Kojić 1
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Although extensive research has been carried out on the understanding of the complex vulcanization process, the influence of reversion through exposure time and temperature on the vulcanization degree remains unclear. Therefore, the main aim of this study was a novel optimization approach that can help the industrial practitioners to select the optimal operating parameters, exposure time, and molding temperature, to achieve desired vulcanization degree of selected product. Spheres of four different diameters (2.5, 5, 10, and 20 cm) were selected as test geometry for simulation and optimization of rubber molding. Obtained vulcanization rheometer data for commercially available rubber blend (NR/SBR) were fitted by a new modeling approach, dividing vulcanization curve into two fitting sets: curing and reversion. The heat transfer equations for chosen geometry were coupled with proposed kinetic model. A new temperature‐dependent kinetic parameter x, as the maximal reversion degree, was introduced, enabling determination of the lowest operating molding temperature (Tmin = 132.36 °C), preventing high reversion and overheating of the rubber product. The final optimization goal was assessment of the optimal temperature and vulcanization time dependence on the rubber products dimensions. Proposed models have precise prediction with R2 values greater than 0.8328 and MAPE less than 2.3099%.
中文翻译：
橡胶成型动力学建模和优化的新方法
尽管已经对理解复杂的硫化过程进行了广泛的研究，但是通过暴露时间和温度进行还原对硫化程度的影响仍然不清楚。因此，本研究的主要目的是提出一种新颖的优化方法，该方法可以帮助工业从业人员选择最佳操作参数，暴露时间和成型温度，以达到所选产品所需的硫化程度。选择四个不同直径（2.5、5、10和20厘米）的球作为测试几何，以模拟和优化橡胶成型。通过新的建模方法拟合获得的市售橡胶共混物（NR / SBR）的硫化流变仪数据，将硫化曲线分为两个拟合集：硫化和返硫。选定几何形状的传热方程式与提出的动力学模型结合在一起。新的温度相关动力学参数引入x作为最大回复度，从而能够确定最低的操作模塑温度（T min = 132.36°C），从而防止橡胶产品的高度回复和过热。最终的优化目标是评估最佳温度和硫化时间对橡胶制品尺寸的依赖性。建议的模型具有R 2值大于0.8328且MAPE小于2.3099％的精确预测。
更新日期：2021-03-07
中文翻译：
橡胶成型动力学建模和优化的新方法
尽管已经对理解复杂的硫化过程进行了广泛的研究，但是通过暴露时间和温度进行还原对硫化程度的影响仍然不清楚。因此，本研究的主要目的是提出一种新颖的优化方法，该方法可以帮助工业从业人员选择最佳操作参数，暴露时间和成型温度，以达到所选产品所需的硫化程度。选择四个不同直径（2.5、5、10和20厘米）的球作为测试几何，以模拟和优化橡胶成型。通过新的建模方法拟合获得的市售橡胶共混物（NR / SBR）的硫化流变仪数据，将硫化曲线分为两个拟合集：硫化和返硫。选定几何形状的传热方程式与提出的动力学模型结合在一起。新的温度相关动力学参数引入x作为最大回复度，从而能够确定最低的操作模塑温度（T min = 132.36°C），从而防止橡胶产品的高度回复和过热。最终的优化目标是评估最佳温度和硫化时间对橡胶制品尺寸的依赖性。建议的模型具有R 2值大于0.8328且MAPE小于2.3099％的精确预测。
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