The influence of the diluent system on the porous structure formation of copolymers based on 2-vinylpyridine and divinylbenzene. Diluent system. III. heptane/methylethylketone

• Published in: Journal of applied polymer science Vol. 91; no. 1; pp. 666 - 669
• Main Authors: Luz, Cosme Tadeu L., Coutinho, Fernanda M. B.
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 05.01.2004; Wiley
• Subjects: 2-vinylpyridine; Applied sciences; copolymerization; crosslinking; Exact sciences and technology; Exchange resins and membranes; Forms of application and semi-finished materials; macroporous polymers; morphology; Polymer industry, paints, wood; Technology of polymers; Diluent; Benzene(divinyl) copolymer; Swelling; Anionic resin; Crosslinking; Experimental study; Porous material; Structure processing relationship; Organic solvent; Pyridine(2-vinyl) copolymer; Adsorption; Morphology; Porosity; Suspension polymerization
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.13233

The effects of the diluent mixture's composition and crosslinking degree [divinylbenzene (DVB)] on the porous characteristics of the anion‐exchange resins based on 2‐vinylpyridine (2VP) and DVB, synthesized by suspension polymerization, in the presence of a diluent mixture constituted of heptane (HEP) and methyl ethyl ketone (MEK) at different proportions, were evaluated. The resins were characterized by mercury porosimetry, nitrogen adsorption (Brunauer–Emmett–Teller (BET) method surface area determination), apparent density, and swelling in methanol. The optical appearance of the copolymer beads was examined by optical microscopy. It was found that the development of porosity was attained whenever the content of methyl ethyl ketone in the diluent mixture was increased for all DVB contents employed. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91: 666–669, 2004