Radical copolymerization of higher alkyl methacrylates with acrylic esters and amides in toluene: influence of monomer association on copolymer composition

Monomer Structure and Solvent Effects on Copolymer Composition in (Meth)acrylate Radical Copolymerization

“…The self-promoting behavior exhibited by HEMA and HEA copolymerization systems, which increases in dilute nonspecific interacting solvent, has also been documented for the radical copolymerization of several unsaturated acids in organic solutions. − In bulk copolymerization, acrylic acid (AA) is preferentially incorporated over MMA, whereas in DMSO, a H-bond disrupting solvent, methacrylate-rich copolymers are produced, in accordance with expectation . In addition, a strong concentration effect was documented for the copolymerization of N -alkyl acrylamides and alkyl acrylates in toluene, where the increasing apparent reactivity of the N -alkyl acrylamides under more dilute conditions was related to the formation of amide associations in solution . For the methacrylic acid (MAA) and ST copolymerization system (in which δ = 1), Noguchi and Kuzuya substantiated through experiment and model that enhanced MAA incorporation could be represented by an intrachain reaction of chain-end radical with MAA monomers H-bonded to MAA repeat units in the growing chain .…”

“…63 In addition, a strong concentration effect was documented for the copolymerization of N-alkyl acrylamides and alkyl acrylates in toluene, where the increasing apparent reactivity of the N-alkyl acrylamides under more dilute conditions was related to the formation of amide associations in solution. 64 For the methacrylic acid (MAA) and ST copolymerization system (in which δ = 1), Noguchi and Kuzuya substantiated through experiment and model that enhanced MAA incorporation could be represented by an intrachain reaction of chain-end radical with MAA monomers H-bonded to MAA repeat units in the growing chain. 65 Similar to a Bootstrap effect, the central premise is that the self-promoting monomer is not inherently more reactive due to its H-bonding capabilities (as would be deduced from the apparent r values measured in non-hydrogen bond interacting solvents).…”

Polymers of Higher Alkyl (Meth)acrylates: The Effects of Structure on Dispersion Properties in Petroleum Oil I-20A

“…For the synthesis and analysis of polymer samples, we used the methods that were previously developed for homopolymers and copolymers of higher alkyl methacrylates and alkyl acrylates [20,21] as well as their copolymers with amine-containing methacrylic esters and amides [22], N-alkyl (meth)acrylamides [23], AOEGM [24], and VBE [15]. For the purposes of the comparative assessment of dispersion properties, we also tested, under similar conditions, a number of commercial additives, specifically: polymethacrylate viscosity index improvers Viscoplex 0-220 and Viscoplex 7-610, polymethacrylate dispersant/VII Viscoplex 12-310 (all manufactured by Evonik RohMaX Additives GmbH), succinimide dispersant S-40 (NPP Qualitet, Russia), and thickener Syntolux V-15 (SOVKHIMTEKH, Russia; this represents a VBE homopolymer).…”

Copolymerization of N-[3-dialkylaminopropyl]methacrylamides with acrylic amides and esters in organic solvents

“…Получение композиционно однородных термочувствительных полимеров позволит достичь более «узкого» фазового перехода с вовлечением максимальной доли макромолекул. Кроме того, для замещенных акриловых амидов исследование закономерностей полимеризации представляет интерес ввиду выявленных ранее особенностей, связанных с протеканием ассоциации молекул мономеров как между собой, так и с растворителем [19][20][21][22][23][24]. Управление степенью протекания ассоциативных взаимодействий в полимеризационных системах с участием замещенных акриламидов также может стать инструментом для контроля композиционной однородности сополимера [21][22][23][24], а значит и его стимулчувствительных свойств.…”