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Morphology of P(BA‐St‐DAAM) latex particles prepared by seeded‐emulsion polymerization
Author(s) -
Li Huaping,
Kan Chengyou,
Du Yi,
Liu Deshan
Publication year - 2003
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.293
Subject(s) - emulsion polymerization , materials science , butyl acrylate , styrene , ammonium persulfate , monomer , acrylamide , polymer chemistry , methacrylic acid , polymerization , acrylate , particle size , chemical engineering , emulsion , morphology (biology) , swelling , particle (ecology) , nuclear chemistry , polymer , copolymer , chemistry , composite material , oceanography , biology , engineering , genetics , geology
Seed latex particles of P(styrene‐butyl acrylate) with narrow diameter distribution were first prepared by using ammonium persulfate as initiator at 80 °C for 3 h, then seeded‐emulsion polymerization of styrene, butyl acrylate, methacrylic acid and diacetone acrylamide onto the P(styrene‐butyl acrylate) seed particles was carried out at 85 °C in the absent of emulsifier. In order to investigate the relationship between the polymerization conditions and particle morphology, three different processes of batch, swelling and semi‐continuous monomer additions were used. It was found that latex particles prepared using the swelling process showed no signs of multiphase morphology, while both batch and semi‐continuous processes gave a strawberry‐like particle morphology. A series of polymerizations was carried out using the semi‐continuous process. Results showed that the more acrylamide monomer that was used, the more distinct the phase separation was, and that different monomer feed rates resulted in the same type of particle morphology. Copyright © 2003 John Wiley & Sons, Ltd.