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Kinetics and temperature evolution during the bulk polymerization of methyl methacrylate for vacuum-assisted resin transfer molding
Composites Part A: Applied Science and Manufacturing ( IF 8.1 ) Pub Date : 2017-10-23 , DOI: 10.1016/j.compositesa.2017.10.022
Yasuhito Suzuki , Dylan Cousins , Jerred Wassgren , Branden B. Kappes , John Dorgan , Aaron P. Stebner

Curing reactions of methyl methacrylate (MMA) comprise an induction time of gradual temperature change over tens of minutes, followed by a sudden temperature rise within tens of seconds because of auto-acceleration known as the Trommsdorff effect. These curing effects were investigated as initial initiator and polymer concentrations were varied. A mathematical model combining the reaction kinetics with heat transfer was developed and verified in its ability to simulate the processing kinetics and temperature evolutions throughout thick MMA-based parts. It was further demonstrated that the processing conditions at specific points within a part during manufacture could be actively controlled via the Trommsdorff effect by locally varying the initial concentration of poly(methyl methacrylate) (PMMA) solution. Together, these advancements provide an enhanced ability to design and optimize the manufacture of thick, large-scale PMMA materials by taking advantage of auto-acceleration instead of avoiding it.



中文翻译:

真空辅助树脂传递模塑的甲基丙烯酸甲酯本体聚合过程中的动力学和温度演变

甲基丙烯酸甲酯(MMA)的固化反应包括在数十分钟内逐渐发生温度变化的诱导时间,然后由于自动加速(称为Trommsdorff效应)而在数十秒内突然升温。随着初始引发剂和聚合物浓度的变化,研究了这些固化效果。建立了将反应动力学与传热相结合的数学模型,并验证了其在整个厚的基于MMA的零件中模拟加工动力学和温度变化的能力。进一步证明,可以通过局部改变聚甲基丙烯酸甲酯(PMMA)溶液的初始浓度,通过Trommsdorff效应来主动控制零件在制造过程中特定位置的加工条件。一起,

更新日期:2017-10-23
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