POLYMERIZATION OF COORDINATED MONOMERS .6. MOLECULAR COMPLEX-FORMATION OF METHYL-METHACRYLATE COORDINATED TO STANNIC CHLORIDE WITH STYRENE OR TOLUENE

被引:35
作者
HIRAI, H [1 ]
KOMIYAMA, M [1 ]
机构
[1] UNIV TOKYO,FAC ENGN,DEPT IND CHEM,BUNKYO,TOKYO,JAPAN
关键词
CHEMICAL REACTIONS - Reaction Kinetics - STYRENE - Polymerization - THERMODYNAMICS - TIN COMPOUNDS - Polymerization - TOLUENE;
D O I
10.1002/pol.1974.170121201
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The equilibrium constants for the complex formation between stannic chloride and methyl methacrylate were determined in n-hexane-toulene solution at 0, minus 20, and minus 30C by using the absorption band at 350 nm. The magnitudes of the shifts for the four groups of protons in methyl methacrylate are found to be in a specific ratio in common with the 1:2 complex-styrene or -toluene system. The equilibrium constants for the ternary molecular complex formation between the 1:2 complex and styrene or toluene were determined in n-hexane in the temperature range minus 50 to plus 20C by use of the chemical shifts. There is a linear relationship between the enthalpy and the entropy changes for the ternary molecular complex formation, which is governed by the enthalpy factor. The effects of the coordination of methyl methyacrylate to stannic chloride were discussed on the basis of results of **1**3C-NMR spectroscopy.
引用
收藏
页码:2701 / 2719
页数:19
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