US EPA

1176022 

Journal Article 

Swelling of porous styrene-divinylbenzene copolymers in water 

Yan, J; Wang, XH; Chen, JQ 

2000 

Yes 

Journal of Applied Polymer Science
ISSN: 0021-8995
EISSN: 1097-4628 

JOHN WILEY & SONS INC 

NEW YORK 

75 

4 

536-544 

English 

10.1002/(SICI)1097-4628(20000124)75:4<536::AID-APP9>3.0.CO;2-C 

WOS:000084012800009 

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033639516&doi=10.1002%2f%28SICI%291097-4628%2820000124%2975%3a4%3c536%3a%3aAID-APP9%3e3.0.CO%3b2-C&partnerID=40&md5=e4cf2163e02455834d00ca4b5502633a
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The swelling capacity of porous styrene-divinylbenzene (DVB) copolymers in water was studied by displacing methanol from the swollen polymer. The copolymers with different amounts of DVB were prepared in the presence of solvents with different solvating powers as inert diluents. Using a solvating solvent or its mixture with a nonsolvent as diluent, most of the obtained copolymers increase their volume in water, and the increase in volume becomes more significant with increasing the degree of crosslinking in some range of the DVB contents. The swelling capacity in water for the same copolymers with a high degree of crosslinking is linearly dependent on the dilution degree in the initial reaction mixture, to some extent. The unusual swelling behaviors in water were explained by the inner strain, which existed mainly in the less crosslinked domains between the highly crosslinked microgel particles,which are released in the course of swelling of the copolymers. (C) 2000 John Wiley & Sons, Inc. 

styrene-divinylbenzene copolymers; inert diluent; swelling; water uptake; pore volume