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论文类型：期刊论文

发表时间：2007-12-15

发表刊物：JOURNAL OF APPLIED POLYMER SCIENCE

收录刊物：SCIE

卷号：106

期号：6

页面范围：4098-4103

ISSN号：0021-8995

关键字：graft copolymers; UV-vis spectroscopy; watersoluble polymers

摘要：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.