关键词: 海藻酸钠, 氯化亚铜, 铜络合物, 海藻酸, 催化剂, 电子自旋共振, 电导率, 红外分光光度法, Ｘ射线衍射分析, 高聚物

The film of copper alginate coordinated polymer was obtained by stirring sodium alginate film in s 15% CuCl2.2H2O solution. The copper alginate film was characterized by ESR spectroscopy, specific conductivity, IR spectrometry and SPS. Its composition and surface structure were determined. The catalytic property of copper alginate for polymerization of MMA was studied. The reaction mechanism of MMA polymerization im copper alginate and HSO3^- solution system is discussed. Experimental results show that the copper ion of copper alginate is coordinated with two carboxyl hydroxyl orygen atoms and two deprotonic carboxyl hydroxyl oxygen atoms of two alginate unitsby covalent bond, the coordination number is four.The copper alginate is shown to be active at pH=7 for catalyzing the polymerization. The copper alginate serves as catalyst in coordination catalysis. MMA polymerized by free radical addition polymeriza- tion and the PMMA obtained possessed random structure.

Key words: SODIUM ALGIMATE, CUPROUS CHLORIDE, COPPER COMPLEX, LGINIC ACID, CATALYST, ELECTRON SPIN RESONANCE, ELECTRICAL CONDUCTIVITY, INFRARED SPECTROPHOTOMETRY, X- RAY DIFFRACTION ANALYSIS, HIGHPOLYMER