聚合
单体
二茂铁
悬浮聚合
化学
高分子化学
抗坏血酸
过氧化物
自由基聚合
氧化还原
有机化学
电化学
聚合物
电极
食品科学
物理化学
作者
Yassir Zouhri,Jean-Michel M. Berthé,Fanny Bonnet,Bernard Stasik,Christel Colemonts,Thierry Lasuye,André Mortreux,Yohan Champouret,Marc Visseaux
出处
期刊:Polymer
[Elsevier]
日期:2022-11-01
卷期号:260: 125368-125368
被引量:2
标识
DOI:10.1016/j.polymer.2022.125368
摘要
Ascorbic acid derivatives in combination with ferrocenyl-based activators in catalytic amounts, referred to as kickers, are described as powerful redox systems to promote the decomposition of organic peroxides into radicals for the polymerization of vinyl monomers under suspension conditions. According to the nature of both the vinylic monomer and the peroxide, the initial polymerization rates can be improved by a factor up to 8. In the presence of ferrocene/ascorbyl palmitate kicker, the overall polymerization time of VCM was reduced from 3 to 2 h under industrial conditions. However, crusting during polymerization as well as yellowing of PVC upon thermal tests were observed. The first problem was solved by changing the surfactant, while optimizing the injection mode of the kicker improved the efficiency of the process without affecting the quality of the resulting PVC. This study demonstrates the effectiveness of ferrocene-based kickers in improving the polymerization of vinyl monomers under suspension conditions.
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