Preparation of amide and amine groups containing copolymers of methyl methacrylate and their performance in solid polymer composites

Abstract

Methyl methacrylate (MMA) was copolymerized with acrylamide, N-methylacrylamide, N,N-dimethylacrylamide, 1 -vinyl-2-pyrrolidone, 4-vinylpyridine, and 2-dimethylaminomethyl methacrylate in 1 ,4-dioxane solution at 65 "C, using AIBN as initiator, to yield copolymers with comonomer contents between about 5 and 50 mole-%. The monomer reactivity ratios were evaluated. The copolymerizations are in general non-azeotropic and non-ideal. The amine group containing comonomers are preferentially incorporated in relation to MMA, but MMA is preferentially incorporated in relation to the amide group containing comonomers. The average molecular weights of the copolymers, with the exception of the N,N-dimethylacrylamide copolymer, decrease with increasing comonomer concentration, especially in the case of the m i n e group containing comonomers. The increasing content of amide and amine group containing monomeric units in the copolymers influences the adsorption of the polymers on an iron oxide red pigment, the dispersion stability, as well as the adhesion of the polymer coatings on steel plates and their corrosion protection.

Free radical copolymerization of N,N‐dimethylaminoethyl methacrylate with styrene and methyl methacrylate: monomer reactivity ratios and glass transition temperatures

“…Many studies concerning the wide application possibilities of DMAEM copolymers have been undertaken; however, information related to polymerization kinetics and copolymerization reactivity is very scarce in the literature. In several studies the monomer reactivity ratios for copolymerization of DMAEM with methyl methacrylate (MMA) in bulk as well as in dioxane and chloroform solutions were reported 11–13. Copolymerizations with a few other methacrylates were also investigated, namely 2‐hydroxyethyl methacrylate, ethyl‐α‐hydroxymethyl acrylate, (2,2‐dimethyl‐1,3‐dioxolan‐4‐yl)methyl methacrylate and tert ‐butyl methacrylate 12, 14, 15.…”

Effectiveness of Poly(vinylpyridine) Block Copolymers as Stabilizers of Aqueous Titanium Dioxide Dispersions of a High Solid Content

“…Influence of the Copolymer Composition. That the molecular composition of a diblock copolymer has to be optimized for imparting the best stability to a dispersion has been shown both theoretically − and experimentally. − This general conclusion will be supported in a forthcoming paper dealing with the dispersing capability of poly(di(methylamino)ethyl methacrylate) containing diblock copolymers . In this paper, only one composition richer in P4VP compared to the D 19 diblock has been considered.…”

“…To answer this question, a copolymer (Rd) has been synthesized by radical polymerization of the comonomers; the mixture was slowly added into the reaction medium held at 65 °C. This technique allows the mixture to reach high comonomer conversion, while keeping the comonomer feed ratio constant . Although the comonomer reactivity ratios are unknown, we may assume a more or less random distribution of the 4VP and tBMA units along the chain, by analogy with the MMA/4VP pair ( r MMA = 0.54 and r 4VP = 1.05) 48 and the MMA/tBMA pair ( r MMA = 0.96 and r tBMA = 1.35), respectively.…”

Semi‐interpenetrating polymer networks based on polyurethane and polymethacrylate functional prepolymers: Morphology and mechanical properties in dependence of the concentration of functional groups

“…The only explanation we can give is that the distribution of the DMAEM monomer in the PM copolymer is not random. The reactivity ratios (r MMA = 0.42 and r DMAEM = 1.01)21 support this presumption, namely, according to the reactivity ratios MMA prefers to react with DMAEM rather than with MMA, thus causing the formation of a copolymer with DMAEM‐rich sequences at low conversions and a copolymer with DMAEM‐deficient sequences at high conversions. It is assumed that T g 's between 95 and 105 °C actually correspond to the T g 's of DMAEM‐deficient sequences, that is, of MMA‐rich sequences.…”