首页> 外文期刊>Journal of Applied Polymer Science >Electropolymerization of 2-Methacryloyloxy(ethyl) Acetoacetate on Aluminum Using a Novel Initiation Method
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Electropolymerization of 2-Methacryloyloxy(ethyl) Acetoacetate on Aluminum Using a Novel Initiation Method

机译:新型引发方法在甲基铝上电聚合2-甲基丙烯酰氧基(乙基)乙酰乙酸酯

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Electropolymerization has been used as a method to form polymers on graphite fibers and metals.most of the previous studies have involved either the use of sulfuric acid as an initiator or direct reduction or oxidation of monomers to form the polymers.In this article,#alpha#-bromoisobutyronitrile (BrIBN) was used as a new electro-chemical initiator to form polymer coatings on an aluminum cathode.The reduction of BrIBN on a glassy carbon electrode was examined using cyclic voltammetery.It was found that BrIBN could be reduced to isobutyronitrile radicals at potentials below the reduction potential of water.The reduction behavior of BrIBN was found to be similar in aqueous,semiaqueous,and nonaqueous solutions.2-Methacryloyloxy(ethyl) acetoacetate was then electropolymerized on aluminum using the BrIBN as the initiator and inthium perchlorate as a supporting electrolyte.Defect-free coatings were formed at half-cell potentials of less than -1.20 V.The effect of various process variables on thepolymerization kinetics under potentiostatic conditions is reported.The coating thickness increased with polymerization time,monomer concentration,and initiator concentration.A strong dependence of thickness on monomer concentration was observed.As expected,there was weak dependence on the initiator concentriation.
机译:电聚合已被用作在石墨纤维和金属上形成聚合物的方法。以前的大多数研究涉及使用硫酸作为引发剂或直接还原或氧化单体以形成聚合物。在本文中,#alpha使用#-溴异丁腈(BrIBN)作为新型电化学引发剂在铝阴极上形成聚合物涂层,使用循环伏安法研究了在玻璃碳电极上BrIBN的还原,发现BrIBN可以还原为异丁腈基团。发现在水,半水和非水溶液中,BrIBN的还原行为相似。然后以BrIBN为引发剂,高氯酸铟为水溶液将2-甲基丙烯酰氧基(乙基)乙酰乙酸酯在铝上进行电聚合。在低于-1.20 V的半电池电位下形成了无缺陷的涂层。各种工艺变量对报道了在恒电位条件下的聚合动力学。涂层厚度随聚合时间,单体浓度和引发剂浓度而增加。观察到厚度对单体浓度的强烈依赖性。如所预期的,对引发剂浓度的依赖性较弱。

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