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Indexed by:期刊论文

Date of Publication:2007-12-15

Journal:JOURNAL OF APPLIED POLYMER SCIENCE

Included Journals:SCIE

Volume:106

Issue:6

Page Number:4098-4103

ISSN No.:0021-8995

Key Words:graft copolymers; UV-vis spectroscopy; watersoluble polymers

Abstract:A series of carboxymethyl chitosan (CMC) with 2,4-dihydoxybenzophenone (UV-0) substituent were synthesized by the Mannich reaction of CMC hydrochloride and UV-0 in the solvent of methanol and water. The different molar degree of substitution (MS) was achieved by changing the UV-0 content. The effects of NIS on ultraviolet absorbability, crystallinity, moisture-absorption and -retention property, and photostability were investigated respectively. The obtained products were characterized by means of Fourier transform infrared spectra (FTIR), proton nuclear magnetic resonance spectroscopy (H-1 NMR), X-ray diffraction, and UV spectrophotometer. It was found that the grafted products were water-soluble, and the increased MS values could enhance the moisture-retention property and photostability, while decreased the crystallinity and moisture-absorption property. The ultraviolet absorption peaks became stronger by introducing UV-0 into the CMC backbones.