Radical copolymerization studies of an amphiphilic macromonomer derived from Triton X-100. Reactivity ratios determination by in situ quantitative 1H NMR monitoring

Preparation of highly branched polyethylene using (α‐diimine) nickel complex covalently supported on modified SiO2

“…So far, only Mühlbach and Percec42 have reported a convincing case in which the reactivity of vinylbenzyl ether macromonomes of poly(2,6‐dimethyl‐1,4‐phenylene oxide) increases with molecular weights up to 5000–7000 and then decreases with increasing molecular weights in copolymerizations with methyl methacrylate (MMA) and butyl methacrylate. Although this42 and other studies43, 44 have not provided definite explanation for the effect of macromonomers' molecular weight on their observed reactivity, it is obvious from the existing results29–41 that not only one single factor determines the copolymerization behavior of macromonomers. It is evident from the results of Radke and Müller39 obtained in copolymerizations of methacrylate‐ended PMMA (PMMA‐MA) with MMA that the molecular weight increase of the macromonomer leads to the decrease in its apparent reactivity.…”

“…Copolymerization of monofunctional macromonomers to obtain graft copolymers have been intensively studied, and it has been found that the increase of the molecular weight of the macromonomer has no effect40, 41 or decreases29–39 its apparent reactivity in copolymerization reactions with low molecular weight monomers. So far, only Mühlbach and Percec42 have reported a convincing case in which the reactivity of vinylbenzyl ether macromonomes of poly(2,6‐dimethyl‐1,4‐phenylene oxide) increases with molecular weights up to 5000–7000 and then decreases with increasing molecular weights in copolymerizations with methyl methacrylate (MMA) and butyl methacrylate.…”

“…Monofunctional macromonomers with one terminal polymerizable group are frequently used to prepare graft copolymers via copolymerization with low molecular weight monomers (see e.g., refs 28–44. and references therein).…”

“…As it has been reported in several studies on the copolymerization behavior of monofunctional macromonomers, in addition to the reactivity ratios of the comonomer units, that is, that of the low molecular weight counterpart of the terminal polymerizable group of the macromonomer and the other comonomer, several other factors, such as overall concentration, viscosity of the reaction medium and molecular weight of the macromonomer influence its apparent reactivity, and thus the structure of the resulting graft copolymers 39–44. It has been found that increasing the molecular weight of monofunctional macromonomers decreases their apparent reactivity in copolymerizations in most of the cases,29–39 and only few cases have been reported with unchanged40, 41 or increased42 reactivities with increasing molecular weights. As conetwork formation with telechelic macromonomers and the composition of the resulting conetworks are expected to depend strongly on the reactivity of the telechelic macromonomers, the effect of their molecular weight in this process is of paramount importance.…”

Influence of cyclodextrin on the solubility and the polymerization of (meth)acrylated Triton® X-100

“…It was found that the reactivity of the methacrylic double bond was not affected by the length of the poly(ethylene oxide) side chain [13]. …”