Initiation of MMA polymerization by iniferters based on dithiocarbamates

Abstract

Twelve modified dithiocarbamates and a thiuramdisulfide used for the initiation of methyl methacrylate (MMA) polymerization were synthesized in this study. The polymerization of MMA was followed by determine the yield and molar mass of the obtained PMMA as a function of polymerization time. Four of the synthesized dithiocarbamates S-benzyl-N,N-dibenzyldithiocarbamate, S-allyl-N,N-dibenzyldithiocarbamate S-benzyl-N,N-diisobutyldithiocarbamate and S-benzoyl-N,N-diisobutyldithiocarbamate, as well as N,N,N',N'-tetrabenzylthiuramdisulfide acted as iniferters. They were active as the initiators of the photo and/or thermally initiated radical polymerization of MMA in bulk and inert solvents (benzene and toluene). S Benzyl - N,N - dibenzyldithiocarbamate can be successfully used for the initiation of MMA polymerization in a polar solvent such as dimethylacetamide.

U okviru ovoga rada izvedena je sinteza dvanaest modifikovanih ditiokarbamata i jednog tiuramdisulfida, koji su korišćeni kao inicijatori polimerizacije metilmetakrilata. Određivanjem zavisnosti prinosa i molarne mase polimetilmetakrilata od vremena polimerizacije pokazano je da se četiri od sintetizovanih ditiokarbamata: S-benzil-N,N-dibenzilditiokarbamat S-alil-N,N-dibenzilditiokarbamat, S-benzil-N, N-diizobutilditiokarbamat S-benzoil-N, N-diizobutilditiokarbamat, kao i N,N,N',N' tetrabenziltiuramdisulfid ponašaju kao iniferteri i da imaju zadovoljavajuću aktivnost kao inicijatori foto i/ili termički inicirane radikalne polimerizacije MMA u masi i inertnom rastvaraču (benzenu i toluenu). Pokazano je takođe da se iniferter S-benzil-N,N-dibenzilditiokarbamat može vrlo uspešno koristiti i za iniciranje polimerizacije MMA u polarnom rastvaraču kao što je dimetilacetamid.