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Monodisperse core/shell latex particles containing carboxylic acid groups and their optimum acid content for pore generation
Author(s) -
Kong Xiang Zheng,
Ruckenstein Eli
Publication year - 1999
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19990228)71:9<1455::aid-app10>3.0.co;2-2
Subject(s) - methacrylic acid , dispersity , methyl methacrylate , polymer chemistry , acrylic acid , styrene , materials science , particle size , monomer , chemical engineering , particle (ecology) , carboxylic acid , methacrylate , ionomer , copolymer , composite material , polymer , oceanography , engineering , geology
Monodisperse seeded latex particles with a core–shell morphology were prepared by copolymerizing, via dropwise addition, styrene (St)–methyl methacrylate (MMA)–acrylic acid (AA) or St–MMA–methacrylic acid (MAA) onto monodisperse seed latex particles of P(St–MMA). The seeded particles thus prepared were subjected to an alkali/acid treatment in order to generate pores in the particles. For the same carboxylic acid content, the volume expansion of the particles due to pore generation was higher in the particles containing AA than in those containing MAA. The size of the pores increased with increasing AA content. However, a maximum particle volume expansion of about 50% was observed for the particles containing 8 mol % AA in the monomer mixture employed in the second stage, and an explanation for this optimum is suggested. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 71: 1455–1460, 1999