壳聚糖大分子构象对其与乙烯基单体接枝聚合及共聚物性能的影响

The conformational states of chitosan macromolecules in solutions and their influence on the "grafting from" polymerization of 2-hydroxyethyl methacrylate and N-vinylpyrrolidone on the polysaccharide and the properties of their copolymers are studied. The conformational transition of macromolecules coil-rigid rod and rigid rod-globule in aqueous acidic solution was established by spectrophotometric method. The coil-rigid rod conformation transition depends on pH, it is sensitive to temperature and doesn't depend on the molecular weight of chitosan. The effective size of chitosan macromolecules for the rigid rod conformation was larger than for the coil conformation.