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RAFT Inverse Miniemulsion Polymerization of Acrylic Acid and Sodium Acrylate
Author(s) -
Ouyang Liu,
Wang Lianshi,
Schork F. Joseph
Publication year - 2011
Publication title -
macromolecular reaction engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 32
eISSN - 1862-8338
pISSN - 1862-832X
DOI - 10.1002/mren.201000050
Subject(s) - miniemulsion , chain transfer , polymer chemistry , polymerization , raft , reversible addition−fragmentation chain transfer polymerization , dispersity , acrylate , chemistry , emulsion polymerization , acrylic acid , molar mass distribution , hydrolysis , chemical engineering , materials science , radical polymerization , copolymer , organic chemistry , polymer , engineering
The synthesis of well‐controlled poly(sodium acrylate) by RAFT inverse miniemulsion polymerization is presented. The effects of RAFT agent concentration, pH of the dispersed phase, types of initiator, and initiator concentration on the polymerization were studied. The partial loss of control at pH above 7 was likely due to the hydrolysis of the RAFT agent. Particle nucleation was investigated by GPC. It was found that the molecular weight distribution was unimodal when using the lipophilic initiator AIBN. Chain extension was carried out, and the morphology of the final latex (after chain extension) was analyzed by SEM. The reason for the wide particle size distribution observed is discussed.