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Polymerization-induced phase separations in branched poly(methyl methacrylate) synthesis

Authors :
Su Ann Neo
David H. Solomon
Greg G. Qiao
Alan Y. Kwok
Source :
Journal of Applied Polymer Science. 98:1462-1468
Publication Year :
2005
Publisher :
Wiley, 2005.

Abstract

Methyl methacrylate and ethylene glycol dimethacrylate or 1,6-hexanediol dimethacrylate (HDDMA) were copolymerized in the presence of a nonsolvent (heptane) for poly(methyl methacrylate) (PMMA) to examine the phenomenon of polymerization-induced phase separations (PIPS) in branched PMMA synthesis. The process was dependent upon the amount of nonsolvent and crosslinker in the reaction mixture. Gel particles were obtained in the majority of phase-separated systems, and their formation was promoted by the preferential partition of monomer and crosslinker into the precipitated polymer phase during the phase separation process. Experimental data showed that, because of its lower solubility parameter, HDDMA can be used as crosslinker to minimize gel particle formation in systems where PIPS is present. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 1462–1468, 2005

Details

ISSN :
10974628 and 00218995
Volume :
98
Database :
OpenAIRE
Journal :
Journal of Applied Polymer Science
Accession number :
edsair.doi...........9732ff286ec4ba60f8f12f93c9f6149c