Ingenious new analytical and process experimental techniques which are environmentally benign techniques viz., ultrasound irradiation have become immensely popular in promoting various reactions. In this work, a novel soluble multi-site phase transfer catalyst viz., 1,4-bis-(propylmethyleneammounium chloride) benzene (BPMACB) was synthesized and its catalytic efficiency was assessed by observing the kinetics of sonolytic polymerization of methacrlyic acid butyl ester (MABE) using potassium persulphate (PPS) as an initiator. The ultrasound-multi-site phase transfer (US - MPTC) assisted polymerization reaction was compared with silent (non-ultrasonic) polymerization reaction. The effects of the catalyst and various reaction parameters on the catalytic performance were in detail investigated by following the kinetics of polymerization of MABE in ethylacetate-water biphasic system. From the detailed kinetic investigation we propose a suitable mechanism. Further the kinetic results demonstrate clearly, that ultrasonic assisted phase-transfer catalysis significantly increased the reaction rate when compared to silent reactions. Notably, this environmentally benign and cost-effective process has great potential to be applied in various polymer industries.

Sonolytic and silent polymerization of methacrylic acid butyl ester catalyzed by a new onium salt with bis-active sites in biphasic system - a comparative investigation

245th National Meeting (2013)

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