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首页> 美国卫生研究院文献>Materials >Experimental Investigation of Methyl Methacrylate in Stirred Batch Emulsion Reactor: AGET ATRP Approach
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Experimental Investigation of Methyl Methacrylate in Stirred Batch Emulsion Reactor: AGET ATRP Approach

机译：搅拌批乳液反应器中甲基丙烯酸甲酯的实验研究：AGET ATRP方法

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摘要

This study examines the ab initio emulsion atom transfer radical polymerization (ATRP) initiated by an eco-friendly reducing agent to produce poly(methyl methacrylate) (PMMA) polymer with controlled characteristics in a 2 L stirred batch reactor. The effect of the reaction temperature, surfactant concentration, monomer to water ratio, and stirring speed was thoroughly investigated. The results showed that PMMA coagulation becomes quite severe at a certain temperature threshold. However, the coagulation could be avoided at mild reaction temperature, since the outcomes showed that loading more surfactant to the system under high mixing speed has balanced the polymer mixture and yielded high monomer conversion. The PMMA product was analyzed by gravimetry and GPC measurements and after 5 h of polymerization at a reaction temperature of 50 °C, monomer conversion of 64.1% was obtained, and PMMA polymer samples produced had an average molar mass of 4.5 kg/mol and a polydispersity index of 1.17. The structure of the PMMA polymer was successfully proved by FTIR and nuclear magnetic resonance (NMR) spectroscopy. The results confirm the living feature of MMA AGET ATRP in emulsion medium and recommend further investigation for other types of surfactant.
机译：该研究检查了由生态友好友好的还原剂引发的AB初始乳液原子转移（ATRP），以在2L搅拌的批量反应器中产生具有受控特性的聚（甲基丙烯酸甲酯）（PMMA）聚合物。彻底研究了反应温度，表面活性剂浓度，单体与水比的影响，并彻底研究了搅拌速度。结果表明，PMMA凝结在一定的温度阈值下变得相当严重。然而，可以在温和的反应温度下避免凝血，因为结果表明在高混合速度下加载更多的表面活性剂，已经平衡了聚合物混合物并得到了高分子体转化。通过重量法和GPC测量分析PMMA产物，并在50℃的反应温度下聚合后，获得64.1％的单体转化，产生的PMMA聚合物样品的平均摩尔质量为4.5kg / mol，a PolyDispersity指数为1.17。通过FTIR和核磁共振（NMR）光谱成功证明了PMMA聚合物的结构。结果证实了乳液介质中MMA Aget ATRP的活性特征，并建议进一步调查其他类型的表面活性剂。

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