Studies of porous polymer gels. II. Structure and porosity of moderately crosslinked poly(methacrylic acid) gels
Article first published online: 9 MAR 2003
Copyright © 1979 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 24, Issue 4, pages 891–900, 15 August 1979
How to Cite
Galina, H. and Kolarz, B. N. (1979), Studies of porous polymer gels. II. Structure and porosity of moderately crosslinked poly(methacrylic acid) gels. J. Appl. Polym. Sci., 24: 891–900. doi: 10.1002/app.1979.070240401
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Revised: 8 JUL 1978
- Manuscript Received: 20 SEP 1976
The porosity of suspension copolymers of methacrylic acid (MA) and divinylbenzene (DVB) has been studied. The copolymers were prepared both directly from monomer blends and with toluene or n-octane as inert diluents. The pore volume and radii of pores were larger for copolymers containing 5.0% of DVB than those for copolymers containing 9.1% of DVB. The volume and radii of pores increased with increasing diluent content, but the effect of n-octane was more pronounced than that of toluene. Based on considerations of monomer reactivities and copolymer-diluent and copolymer-unreacted monomer interactions, the following model of structure of MA and DVB copolymers has been proposed: The copolymers are composed of microgels interconnected into a rigid skeletonlike structure, surrounded by lightly crosslinked and unentangled poly(methacrylic acid) chains.