Authors: G Roshan Deen Y Y Gan L H Gan S H Teng
Publish Date: 2010/05/05
Volume: 66, Issue: 3, Pages: 301-313
Abstract
Copolymers of NacryloylN′methylpiperazine AcrNMP and 2hydroxyethyl methacrylate HEMA were synthesized by free radical solution polymerization in dioxane at 70 ± 1 °C using 22′azobisisobutyronitrile AIBN as initiator The copolymer compositions were analyzed by the methods of FTIR spectroscopy and elemental analysis Both the method of analysis yielded results that agreed reasonably well The monomer reactivity ratios of the copolymerization were determined by the linearization methods of Finemann–Ross FR and Kelen–Tüdös KT The reactivity parameter results derived using FTIR analysis showed that the copolymerization yielded mainly alternating structure with reactivity ratios r 1AcrNMP = 0263 ± 0011 and r 2HEMA = 0615 ± 0097 by F–R method and r 1 = 0227 ± 0074 and r 2 = 053 ± 015 by KT method Microstructure data calculated by the method of Igarashi also supports the alternating structure tendency of the copolymer Crosslinked polymer gels of this system exhibited remarkably high swelling of more than 500 in water at ambient temperature
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