spnopmsThe polymerization of N-vinylcaprolactam in toluene, dioxane, chlorobeneene, dimethylformamide, and ethylene carbonate with various peroxides, perbenzoates and azobisisobutyronitrile as initiators at 60-8OoC, was studied. Under these conditions azobisisobutyronitrile and terkbutyl perbenzoate have satisfactory activity as initiators. Under these conditions N-vinylcaprolactam polymerization in homogeneous solution is f h t order towards the monomer and 0.5 order towards the initiators.
synopsisThe bulk polymerization of 2-allylphenylscrylic ester and of 2-allylphenylmethacrylic ester at 60-80°C. was studied. It was observed that under these conditions azobisisobutyronitrile, lauroyl peroxide, and benzoyl peroxide have satisfactory activity as initiators. The influence of atmospheric oxygen on AOAF and MOAF polymerization was proved. The peculiarities of AOAF and MOAF polymerization (low molecular weight of the soluble polymers which are formed, the absence of gel effect, relatively low critical conversions) may be explained on the basis of chain transfer reactions by the allylic groups.It is known that the radical bulk polymerization of tetrafunctional monomers occurs with formation of crosslinked, insoluble, and infusible polymers. For this reason this reaction is usually named "crosslinking polymerization " or ilthredimensional polymerization." There are a lot of works dealing with this type of reaction, some of which have a special importance for the explaining of gel-formation, geleff ect, cyclization, and other phenomena which are taking place during the three-dimensional polymeri~ation.l-~ The research in this field was directed almost exclusively towards the study of polymerization of symmetric tetrafunctional monomers.Acrylic and methacrylic esters of 2-allylphenol (AOAF and MOAF) are asymmetric tetrafunctional monomers. The molecules contain two unsaturated, structurally different groups, the allylic and the acrylic (methacrylic) ones, which have a different reactivity in the polymerization reaction.The synthesis and polymerization of AOAF were not described till now, lo and very little work has been found on the synthesis and polymerization of MOAF and the properties of respective polymers.11*12The present work refers to the study of AOAF' and MOAF radical bulk polymerization. 1631
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