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Synthesis and Characterisation of Chitosan Derivatives

其他書名	A Thesis Submitted for the Degree of Doctor of Philosophy at the University of Otago, Dunedin, New Zealand
出版	University of Otago, 2008
URL	http://books.google.com.hk/books?id=3Qo6PwAACAAJ&hl=&source=gbs_api

註釋Chitosan was reacted with the monomer OEGMA by ATRP to form chitosan-graft-poly(OEGMA) copolymers. Two synthetic routes were investigated. The "grafting-from" route involved. the formation of a chitosan macroinitiator and polymerisation of OEGMA with this polymer. The polymers contained a large amount of grafted side chains as estimated from the 1H NMR spectra. However, the purification was not satisfactory as determined by the presence of two peaks in the GPC traces. The "grafting-to", route involved the formation of poly(OEGMA) by ATRP with activated initiators and subsequent attachment to chitosan. The prepared copolymers showed large differences in their appearance with even very low amounts of grafting. The purification of the polymers prepared by this method was successful with no detectable homopolymer as determined by GPC analysis.