Photopolymerization of n-Butyl Methacrylate in Solutions Initiated by Diphenyl Ditelluride

Abstract

Radical photopolymerization of n-butyl methacrylate (BMA) with diphenyl ditelluride [DPDT] as a photoinitiator has been carried out by visible light excitation at room temperature for 24 h. The system followed non-ideal kinetics, i.e., R p ∝ [DPDT]2.00[BMA]1.75. The FT-IR spectrum showed a band at 1721 cm−1 due to acrylate C=O Str. The 1H-NMR spectrum showed a peak at 3.9 δ due to –O–CH2– of acrylate. The 13C-NMR spectrum showed resonance signals at δ 175.55–178.20 ppm due to carbonyl carbon. The presence of tellurium in polymer is confirmed by qualitatively, as well as with ICP-MS. The ESR showed the free radical mode of polymerization and the gyromagnetic constant g has been computed as 2.2203.