Homopolymerizations ethyl acrylate

During mutual graft copolymerization, homopolymerization always occurs. This is one of the most important problems associated with this technique. When this technique is applied to radiation-sensitive monomers such as acrylic acid, methacrylic acid, polyfunctional acrylates, and their esters, homopolymer is formed more rapidly than the graft. With the low-molecular weight acrylate esters, particularly ethyl acrylate, the homopolymer problem is evidenced not so much by high yields as by erratic and irreproducible grafting. 

Jagodic et al. (1975, 1976) also studied the effect of the HLB of emulsifying agents in the emulsion homopolymerization of methyl methacrylate, ethyl acrylate, and acrylonitrile and in the emulsion copolymerization of methyl methacrylate and ethyl acrylate, methyl methacrylate and... 

Bulk addition multipolymerization kinetics occurs when two monomers are employed. Bulk free-radical homopolymerizations and copolymerizations that are implemented in REX include a) styrene-acrylonitrile, styrene-methyl methacrylate, styrene-acrylamide b) methyl methacrylate-acrylonitrile, ABS c) acrylate ester mixtures d) ethyl acrylate-methacrylic acid and mixtures with other monomers e) methyl methacrylate f) 8-caprolactone and, n-isopropylacrylamide-acrylic... 

New macroradicals have been obtained by proper solvent selection for the homopolymerization of styrene, methyl methacrylate, ethyl acrylate, acrylonitrile, and vinyl acetate, and by the copolymerization of maleic anhydride with vinyl acetate, vinyl isobutyl ether, or methyl methacrylate. These macroradicals and those prepared by the addition to them of other monomers were stable provided they were insoluble in the solvent. Since it does not add to maleic anhydride chain ends, acrylonitrile formed a block copolymer with only half of the styrene-maleic anhydride macroradicals. However, this monomer gave excellent yields of block polymer when it was added to a macroradical obtained by the addition of limited quantities of styrene to the original macroradical. Because of poor diffusion, styrene did not add to acrylonitrile macroradicals, but block copolymers formed when an equimolar mixture of styrene and maleic anhydride was added. 

A particularly important breakthrough was achieved by Bai and Jennings in 2005 in the surface-catalyzed polymerization of diazomethane by using ethyl diazoacetate (EDA) as a comonomer [30] (Scheme 8). Although surface-catalyzed homopolymerization of EDA did not proceed, EDA can be incorporated into the resulting polymer chain when an ether solution of a mixture of diazomethane and EDA was contacted with an Au-surface. The resulting surface bound copolymer, poly(methylene-co-ethoxycarbonylmethylene), has the same structure as that of random copolymer of ethylene and ethyl acrylate. Whereas the incorporation efficiency... 

Functional groups have also been placed on surfaces of organic colloidal particles prepared in an emulsion process. Vairon et al. applied ATRP to the homopolymerization of 2-hydroxyethyl acrylate (HEA) and 2-(methacryloyloxy)ethyl tri-methylammonium chloride from the surface of a crosslinked polystyrene latex functionalized with alkyl bromide groups. ATRP was carried out using the surface groups of the dialyzed latex as the initiators. The resulting hydrophobic core/hy-... 

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