Synthèse par voie radicalaire de polymères à extrémités hydroxylées, 11. Etude de la copolymérisation du méthacrylate de méthyle avec divers acrylates et méthacrylates. Détermination des rapports de réactivité

Abstract

Methylmethacrylate (MMA) was polymerized in an oxygen or argon atmoq --:re with utyl or isobutyl acrylates, and butyl, isobutyl, or 2,3-epoxypropyl methacrylates, by hydrogen peroxyde in the presence of ethanol under UV irradiation (254 nm) at room temperature. The reactivity ratios were determined. MMA shows a higher reactivity than its comonomers, in good agreement with the results of the literature, except for isobutyl and 2,3-epoxypropyl methacrylates.

Use of an Immobilized/Soluble Hybrid ATRP Catalyst System for the Preparation of Block Copolymers, Random Copolymers, and Polymers with High Degree of Chain End Functionality

“…In this catalyst system, the reactivity ratio of MMA (r MMA ) and nBA (r BA ) was estimated to be 2.16 and 0.42, respectively. The reactivity ratios calculated from this experiment and those reported in several literature references 31,[40][41][42][43][44][45] are summarized in Table 3. The reactivity ratio for the hybrid catalyst system fairly agrees with the literature values; however, the agreement is not perfect.…”

Scope and limitation of the copper free thermal Huisgen cross-linking reaction to stabilize the chromophores orientation in electro-optic polymers

“…Taking into account the values of the reactivity ratio of 10 and 13 and feed ratio (13/10 ¼ 7/3) for the preparation of P1 the simulation of the monomer distribution in the polymer chain can be deduced. 33 Taking into account that molar concentration of the chromophores in the polymer P1 is much lower than that of propargyl methacrylate, the simulation indicates that, at maximum, about 1.4 chromophores are statistically neighbored with 1 propargyl unit.…”

High-temperature solution polymerization of butyl acrylate/methyl methacrylate: Reactivity ratio estimation

“…In an additional step, we have estimated the reactivity ratios for bulk BA/MMA copolymerizations over an extended temperature range (60 -140°C). 8 Other kinetic studies include solution copolymerizations by Brosse et al 9 and emulsion copolymerizations by Emelie et al, 10 Urretabizkaia et al, 11 and Dubé and Penlidis. 12 Furthermore, a study of solvent effects on reactivity ratios has been published recently for both the BA/MMA and methyl acrylate/MMA systems in benzene at 50°C at two solvent concentrations.…”