Process for the preparation of graft copolymers by Reversible Addition Fragmentation Chain Transfer (RAFT) and Ring Opening Polymerisation (ROP)
申请人:Polymers Australia PTY Limited
公开号:EP1950232A1
公开(公告)日:2008-07-30
A combined RAFT/ROP process for the preparation of a graft co-polymer having a backbone built-up from repeating units derived by polymerization of free-radically polymerizable monomers comprising vinylic monomers, and polyester side chains grafted to said backbone derived by ring-opening polymerisation of cyclic ester compounds; said process comprising reacting a mixture of
(a) one or more vinylic monomers, optionally in combination with other monomers susceptible to free-radical polymerization, wherein at least one of said vinylic monomers comprises a (free) hydroxyl group;
(b) a thiocarbonylthio compound as chain transfer agent;
(c) one or more cyclic esters, which is/are susceptible to a ring-opening polymerization; and
(d) a compound effective for initiating the ring-opening polymerization of the one or more cyclic esters;
and reacting said mixture in an inert solvent at a temperature of more than 90°C under exclusion of oxygen to form the graft copolymer.
一种结合了RAFT/ROP过程的方法,用于制备一种接枝共聚物,其骨架由通过自由基聚合获得的重复单元构建,包括乙烯单体,并且由环酯化合物的环开聚合衍生的聚酯侧链嫁接到该骨架上;该方法包括反应以下混合物:(a) 一种或多种乙烯单体,可选地与其他易于自由基聚合的单体组合在一起,其中至少一种乙烯单体包含一个(自由)羟基;(b) 一种硫代羰基硫化合物作为链转移剂;(c) 一种或多种易于环开聚合的环酯;以及(d) 一种有效于启动一种或多种环酯的环开聚合的化合物;并在惰性溶剂中,在排除氧气的条件下,以高于90°C的温度反应该混合物,以形成接枝共聚物。