A new initiating system based on [(SiMes)Ru(PPh₃)(Ind)Cl₂] combined with azo-bis-isobutyronitrile in the polymerization and copolymerization of styrene and methyl methacrylate

Abstract

The homopolymerization and copolymerization of styrene and methyl methacrylate, initiated for the first time by the combination of azo-bis-isobutyronitrile (AIBN) with [(SiMes)Ru(PPh3)(Ind)Cl2] complex. The reactions were successfully carried out, on a large scale, in presence this complex at 80 °C. It was concluded from the data obtained that the association of AIBN with the ruthenium complex reduces considerably the transfer reactions and leads to the controlled radical polymerization and the well-defined polymers.

New Method Based on the Direct Analysis in Real Time Coupled with Time-of-Flight Mass Spectrometry to Investigate the Thermal Depolymerization of Poly(methyl methacrylate)

“…This procedure was triplicated three times in the same conditions, and the results of the polymerization were taken from the arithmetic mean of the three trials. The apparent molecular weight, M , estimated from the percentage yield of the polymerization and Equation (1) [ 25 ] was 1.61 × 10 5 g·mol −1 . where and are the mole numbers of MMA and AIBN, respectively, is the molar mass of MMA and 2 is the number of free radicals that resulted from the dissociation of AIBN.…”