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《Polymeric Materials Science & Engineering》 2005-04
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METAL-COORDINATING CONTROLLED OXIDATIVE DEGRADATION OF CHITOSAN AND DYNAMICS INVESTIGATION ——(Ⅱ) DYNAMICS INVESTIGATION

YIN Xue-qiong, LIN Qiang, FENG Yu-hong, YU Wei-xia, ZHANG Qi (Department of Chemical Engineering, Hainan University, Haikou 570228, China)  
Chitosan was converted into chitosan-metal complexes, and then polymer chain of chitosan became more easily to be broken due to coordinating bond between chitosan and metal ion. It is assumed metal ion distributing uniformly on chitosan polymer chain and the molar ratio of metal and chitosan is 1∶N, then chitosan complex can be considered as a new polymer whose monomer is N glucose residues and one metal ion. The new polymer shall degrade on the dynamic regular of random degradation and its degradative result confirmes to the dynamic equation very well. Rate constant of chitosan-metal complex and chitosn expressed chitosan-Cu(Ⅱ) complex has a better molecular structure for degradation than chitosan, and can catalyze H_2O_2 decomposition. But chitosan-Mn(Ⅱ) complex only has a better molecular structure, and can′t catalyze H_2O_2 decomposition.
【Fund】: 国家自然科学基金资助项目(20061001);; 海南省自然科学基金资助项目(20304)
【CateGory Index】: O643.11
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