writer：Fa-Ai Zhang, Cai-Li Yu, Xing-Hua Zhu, Chun Wei
keywords：acrylate; hydroxyl groups; emulsion polymerization; initiators; particle size; distribution
source：期刊
specific source：Polymer for Advanced Technology
Issue time：2006年

The influence of the initiator (ammonium persulfate, APS) and APS/reducer system on the acrylate
emulsion copolymerization of methyl methacrylate/butyl acrylate/acrylic acid/hydroxylethyl
methacrylate (HEMA) was studied. The initiator level, reaction temperature, reducer type and
reducer level on the effect of polymerization rate, particle size and size distribution were
investigated. It was found that with the existence of hydrophilic monomer HEMA, polymerization
rate increased but the particle size decreased and the size distribution became narrowed with the
increase of initiator level, reaction temperature and reducer sodium hydrogen carbonate (NaHSO3)
level. TheAPS/NaHSO3 system had better initiation efficiency than the APS/FeSO4 system