Porous structure and swelling properties of styrene–divinylbenzene copolymers for size exclusion chromatography

✍ Scribed by Fernanda M.B. Coutinho; Márcia Angélica F.S. Neves; Marcos L. Dias

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 140 KB
• Volume: 65
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19970815)65:7<1257::aid-app3>3.0.co;2-h

✦ Synopsis

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.