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dc.contributor.authorDong, YM
dc.contributor.author董炎明
dc.contributor.authorGuo, ZC
dc.contributor.author郭振楚
dc.contributor.authorWu, YS
dc.contributor.author吴玉松
dc.contributor.authorRuan, YH
dc.contributor.author阮永红
dc.contributor.authorTong, BH
dc.contributor.author童碧海
dc.contributor.authorZhao, YQ
dc.contributor.author赵雅青
dc.contributor.authorWang, HW
dc.contributor.author王惠武
dc.date.accessioned2012-04-09T01:05:11Z
dc.date.available2012-04-09T01:05:11Z
dc.date.issued2003
dc.identifier.citationCHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2003,24(12):2330-2332zh_CN
dc.identifier.issn0251-0790
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/12013
dc.description.abstractChitin derivatives are difficult to be melten because of their very strong inter-molecular and intra-molecular hydrogen bonds. In this paper, N, O-benzyl chitosan was synthesized by means of phase-transfer method. The total degree of substitution for this derivative was 0.8 as determined with H-1 NMR and the degree of substitution on nitrogen was 0.3 as determined with elemental analysis. This is a thermoplastic chitin derivative. It's melting point was 470 K as measured with DSC. A viscous isotropic melt occurred at the temperatures between the melting point and the decomposition temperature(513 K) while N,O-benzyl chitosan was heated on a hot stage. DSC results agreed with the results of microscopy observation. The benzyl group can not form hydrogen bonds. It is also non-polar and has larger volume. These factors weaken the interactions between chitosan chains, and therefore decrease the melting point, which was lower than the decomposition temperature. As a result, N,O-benzyl chitosan was able to melt.zh_CN
dc.language.isozhzh_CN
dc.publisherHIGHER EDUCATION PRESSzh_CN
dc.subjectchitinzh_CN
dc.subjectchitosanzh_CN
dc.subjectthermoplasticityzh_CN
dc.subjectbenzyl chitosanzh_CN
dc.subjectmeltzh_CN
dc.titleSynthesis and characterization of thermoplastic chitin derivative N,O-benzyl chitosanzh_CN
dc.typeArticlezh_CN


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