In this paper, copolymerization of methyl methacrylate (MMA) with n-butyl acrylate (BA) in a bubble column reactor using benzoyl peroxide as free radical initiator, at a temperature over 85 °C, is presented. This mode of copolymerization keeps an inert atmosphere throughout the entire reaction and contributes to proper mixing of the monomers. Higher pressure of the bubbling ensures the faster contact of the species, and a higher conversion was obtained in a shorter reaction time. The conversion of monomer at 124 Pa after 210 min is total, which is particularly noteworthy due to the absence of residual monomer that represents hazardous compounds, with negative impact upon employees and end-user safety. Higher conversions are obtained at 96 °C, 124 Pa nitrogen bubble pressure, 60/40% moles monomer ratio BA/MMA and 2% POB. The molar mass Mw, Mn and PDI decrease with the increase in temperature quite linearly. In the absence of nitrogen bubbling, the copolymer composition is approximately the same as in the feeding mixture. The corrosion protection efficiency of steel painted with these acrylic coatings was carried out by means of OCP and potentiodynamic polarization testing and electrochemical impedance spectroscopy (EIS).

中文翻译：

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丙烯酸丁酯与甲基丙烯酸甲酯在泡罩塔反应器中的共聚及共聚物在防腐中的应用

在本文中，介绍了甲基丙烯酸甲酯 (MMA) 与丙烯酸正丁酯 (BA) 在鼓泡塔反应器中使用过氧化苯甲酰作为自由基引发剂，在 85 °C 以上的温度下进行共聚。这种共聚模式在整个反应过程中保持惰性气氛，有助于单体的适当混合。更高的鼓泡压力确保了物质的更快接触，并且在更短的反应时间内获得了更高的转化率。210 分钟后，单体在 124 Pa 下的转化是完全的，这尤其值得注意，因为不存在代表危险化合物的残留单体，对员工和最终用户安全产生负面影响。在 96 °C、124 Pa 氮气泡压力、60/40% 摩尔单体比率 BA/MMA 和 2% POB 下获得更高的转化率。摩尔质量 Mw，Mn 和PDI 随温度升高呈线性下降。在没有氮气鼓泡的情况下，共聚物组成与进料混合物中的大致相同。涂有这些丙烯酸涂层的钢的腐蚀保护效率是通过 OCP 和动电位极化测试和电化学阻抗谱 (EIS) 进行的。