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

Methyl methacrylate and acrylamide crosslinked macroporous copolymers

“…6), the total porosity value of copolymer can be seen, about 3.2 cm 3 /g, and at the same time one may determine the percentage of > 10‐μm pore volume content, which amounts to about 6%, or 0.192 cm 3 /g. From the pore size distribution curve, the free surface value S S,Hg in m 2 /g can be calculated by use of the following equation:27, 29 where V i (in cm 3 /g) is the volume of d i (in nm) diameter pores. For the copolymer sample, the free surface value obtained was 22.7134 m 2 .…”

“…The macroporous polymer based on methyl methacrylate synthesized by suspension polymerization with glycidyl methacrylate27–29 can be used for selective sorption of metal ions; the synthesis under hypercritical conditions in carbon dioxide by sol–gel polymerization is well known, where methyl methacrylate is one of the comonomers to give the necessary hardness to the finished polymer product 30, 31. In the U.S. patent literature there are data on porous polymethyl methacrylate as human implant material,32, 33 and on porous polymethyl methacrylate with protein content 34…”