The catalytic system of azo-bis-isobutyronitrile (AIBN) combined with (SiMes)Ru(PPH₃)(Ind)Cl₂ [M₂₀] was investigated for the controlled radical polymerization of methyl methacrylate (MMA) in solution. Various factors that may influence the catalytic polymerization process, such as the aging time of the initiating system, AIBN/M₂₀ ratio, concentration of monomer, polymerization time, temperature, and the nature of solvent were examined. The results showed that the yield, molecular weight, and molecular distribution are practically unaffected by these parameters; however, the syndiotactic stereo-structure tendency that characterizes the produced poly(methyl methacrylate) (PMMA) varied with temperature. The optimum conditions for PMMA synthesis were determined to produce an essentially syndiotactic material with uniformly high molecular weights. It was also revealed that the kinetics of MMA polymerization is of first order with respect to the concentration of monomer. A comparison was also made for some vinylic polymers synthesized either with the AIBN alone or with the AIBN/M₂₀initiating system under the same conditions.

研究了偶氮二异丁腈（AIBN）与（SiMes）Ru（PPH ₃）（Ind）Cl ₂ [M ₂₀ ]的催化体系，以控制溶液中甲基丙烯酸甲酯（MMA）的自由基聚合。可能影响催化聚合过程的各种因素，例如引发体系的老化时间AIBN / M ₂₀考察了比例，单体浓度，聚合时间，温度和溶剂的性质。结果表明，收率，分子量和分子分布实际上不受这些参数的影响。然而，表征所生产的聚甲基丙烯酸甲酯（PMMA）的间同立构立体趋势随温度而变化。确定了用于PMMA合成的最佳条件，以生产具有均一的高分子量的基本上为间同立构的材料。还揭示出，MMA聚合的动力学相对于单体的浓度是一级的。还对在相同条件下单独用AIBN或用AIBN / M ₂₀引发体系合成的一些乙烯基聚合物进行了比较。