Destarac Mathias, Guinaudeau Aymeric, Mazières Stéphane, Wilson James
Laboratoire SOFTMAT, CNRS UMR 5623, University of Toulouse, University Toulouse III-Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France.
Syensqo, Centre de Recherche et Innovation Lyon, 85 Rue des Frères Perret, BP 62 69192 Saint Fons, France.
Molecules. 2024 Dec 20;29(24):6004. doi: 10.3390/molecules29246004.
Rhodixan A1 is the trade name for -ethyl -(1-methoxycarbonylethyl)dithiocarbonate, a RAFT/MADIX agent used by Syensqo to produce block copolymer additives for aqueous formulations on an industrial scale. Chain transfer coefficients to Rhodixan A1 determined for 25 different styrenic, acrylate, and acrylamide monomers were relatively low (0.6 < C < 3.8) and evolved in the following order: styrenics < acrylates < acrylamides. The corresponding interchain transfer coefficients followed the same trend (0.6 < C < 5.9). In all cases, polymers with predetermined are obtained at high monomer conversion, with dispersities inversely proportional to C in most cases. With the added benefit of the established excellent reactivity of Rhodixan A1 towards unconjugated monomers such as vinyl esters, diallyl, or -vinyl monomers, RAFT/MADIX is a fantastic technological toolbox for tailor-making complex copolymers from monomers of highly disparate reactivities.
Rhodixan A1是-乙基-(1-甲氧羰基乙基)二硫代碳酸酯的商品名，是索尔维公司用于工业规模生产水性配方用嵌段共聚物添加剂的一种可逆加成-断裂链转移（RAFT）/ 单电子转移活性自由基聚合（MADIX）试剂。针对25种不同的苯乙烯类、丙烯酸酯类和丙烯酰胺类单体测定的向Rhodixan A1的链转移系数相对较低（0.6 < C < 3.8），且按以下顺序变化：苯乙烯类 < 丙烯酸酯类 < 丙烯酰胺类。相应的链间转移系数遵循相同趋势（0.6 < C < 5.9）。在所有情况下，在高单体转化率下可获得具有预定 的聚合物，在大多数情况下，分散度与C成反比。鉴于Rhodixan A1对诸如乙烯基酯、二烯丙基或 -乙烯基单体等非共轭单体已确定的优异反应活性，RAFT/MADIX是一个出色的技术工具箱，可用于由反应活性差异很大的单体定制复杂共聚物。
