Emulsion Polymerization of Vinyl Acetate in the Presence of Different Hydrophilic Polymers Obtained by RAFT/MADIX
作者:Sandra Binauld、Laura Delafresnaye、Bernadette Charleux、Franck D’Agosto、Muriel Lansalot
DOI:10.1021/ma402549x
日期:2014.5.27
The surfactant-free emulsion polymerization of vinyl acetate (VAc) was achieved using RAFT/MADIX-mediated polymerization-induced self-assembly (PISA) process in water. First, well-defined hydrophilic macromolecular RAFT agents (macroRAFT) bearing a xanthate chain end were synthesized by RAFT/MADIX polymerization of N-vinylpyrrolidone (NVP) and N-acryloylmorpholine (NAM) or by post-modification of commercial
使用RAFT / MADIX介导的聚合诱导的自组装(PISA)工艺在水中实现了乙酸乙烯酯(VAc)的无表面活性剂乳液聚合。首先,通过RAFT / MADIX聚合N-乙烯基吡咯烷酮(NVP)和N的合成明确定义的带有黄原酸酯链端的亲水性大分子RAFT试剂(macroRAFT)。-丙烯酰基吗啉(NAM)或通过商业化聚乙二醇的后改性处理。macroRAFT与VAc在水中的链扩展导致嵌段共聚物纳米级组织,并随后形成了具有高固含量(35-37 wt%)的稳定且等分散的PVAc乳胶纳米颗粒。还研究了包括macroRAFT试剂前体的性质和功能在内的各种参数对聚合动力学和颗粒形态的影响。