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dc.contributor.authorDong, YM;
dc.contributor.author董炎明
dc.contributor.authorXu, CY
dc.contributor.authorWang, JW
dc.contributor.authorWu, YS
dc.contributor.authorWang, M
dc.contributor.authorRuan, YH
dc.date.accessioned2012-05-23T00:55:31Z
dc.date.available2012-05-23T00:55:31Z
dc.date.issued2001-12-04
dc.identifier.citationJOURNAL OF APPLIED POLYMER SCIENCE,2002,83(6):1204-1208zh_CN
dc.identifier.issn0021-8995
dc.identifier.urihttp://dx.doi.org/doi:10.1002/app.2286
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/12488
dc.description.abstractWe prepared chitosans with various degrees of deacetylation (DDAs) by mixing completely deacetylated chitosan and acetic anhydride at room temperature without serious degradation and O-substitution. We obtained a standard curve to measure DDA by plotting the IR absorbance ratio of A(1560)/A(2880) against the known DDAs (from 1-100%) of 10 specimens. The effect of DDA on the critical concentration (C*) of chitosan/dichloroacetic acid solutions required to form mesophase was investigated by optical methods. A maximum C* value of 23 wt % appeared at a relative medium DDA (similar to 20%). The effect was explained by the disordering of chains with medium composition ratios of the copolymer of glucosamine and N-acetyl glucosamine. (C) 2002 John Wiley & Sons, Inc. J Appl Polym Sci 83: 1204-1208, 2002.zh_CN
dc.language.isoenzh_CN
dc.publisherJOHN WILEY & SONS INCzh_CN
dc.subjectchitinzh_CN
dc.subjectchitosanzh_CN
dc.subjectliquid-crystalline polymerszh_CN
dc.subjectdegree of deacetylationzh_CN
dc.subjectcritical concentrationzh_CN
dc.titleInfluence of degree of deacetylation on critical concentration of chitosan/dichloroacetic acid liquid-crystalline solutionzh_CN
dc.typeArticlezh_CN


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