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Porous structure and swelling properties of styrene–divinylbenzene copolymers for size exclusion chromatography
Author(s) -
Coutinho Fernanda M.B.,
Neves Márcia Angélica F.S.,
Dias Marcos L.
Publication year - 1997
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(19970815)65:7<1257::aid-app3>3.0.co;2-h
Subject(s) - divinylbenzene , copolymer , diluent , toluene , styrene , polymer chemistry , swelling , monomer , heptane , materials science , dilution , polymerization , suspension polymerization , chemical engineering , chemistry , polymer , organic chemistry , composite material , engineering , physics , thermodynamics
Small spherical particles of styrene–divinylbenzene copolymers have been synthesized by modified suspension polymerization. The effects of divinylbenzene (DVB) contents, dilution degree of the monomers and diluent composition on the porous structure and swelling properties of the copolymers were investigated. Toluene uptakes of macroporous copolymers were considered as a result of three contributions: filling of the fixed pores, expansion of the fixed or collapsed pores, and nuclei swelling and heptane uptakes as a result of the two first contributions. The increase of DVB content in the copolymers synthesized in presence of a solvating diluent (toluene) provoked a decrease on the nuclei swelling. The increase of dilution degree with solvating diluents changed the toluene and heptane uptakes, and when the diluent–copolymer affinity was reduced, the fixed pore volume increased. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65:1257–1262, 1997