Graft copolymerization of water‐soluble monomers containing quaternary ammonium group on poly(vinyl alcohol) using ceric ions

Abstract

Graft copolymerization of water-soluble monomers containing quaternary ammonium onto PVA was studied in an aqueous medium using ceric ammonium nitratenitric acid as the redox initiator. To optimize the reaction conditions for obtaining a maximum percent of grafting, the concentrations of methacryloxyethyl trimethylammonium chloride (DMC) monomer, ceric ammonium nitrate, and temperature were varied, and the effects on the grafting copolymerization were discussed. Under optimum conditions, a series of water-soluble monomers containing quaternary ammonium, such as methacryloxyethyl trimethylammonium chloride (DMC), DMAEMA C 7 H 7 Cl, were successfully grafted onto PVA. The resulting grafted PVA were characterized with IR, NMR, and viscosity measurements.

Preparation and characterization of graft copolymerization of ethyl acrylate onto hydroxypropyl methylcellulose in aqueous medium

“…In addition, various hydrogen abstraction and chain transfer reactions may also be accelerated at higher temperatures, thereby leading to decreased G. The significant decrease in G E depicted in Figure 4 may be attributable to the extremely low chain transfer to the monomer in the graft copolymerization system and the increased number of homopolymers formed at the higher temperature. These results are in agreement with observations reported by Zheng et al (2005).…”

Effect of dimethylaminoethyl methacrylate on the graft copolymerization of ethyl acrylate onto hydroxypropyl methylcellulose in aqueous medium

“…In addition, various hydrogen abstraction and chain transfer reactions also might be accelerated at higher temperatures, leading to the decrease of G. The significant decrease in G E that is shown on Figure 9 may be attributed to the extremely low chain transfer to the monomer in the graft copolymerization system, and the increasing number of homopolymers formed at higher temperatures. These results are in agreement with earlier observations (Zheng et al 2005).…”

Influence of grafting conditions on the properties of polyacrylamide-based cation-exchange cryogels grafted with 2-acrylamido-2-methyl-1-propanesulfonic acid

“…This behavior indicates that Cu(III) is primarily used to generate free radicals on the cryogel backbone for the initiation of graft polymerization. As more radicals are produced, the protein binding capacity increases, as those by Liu et al (2003) and Zheng et al (2005).…”

“…The reactant mixture consists of AAm + MBAAm = 7%, AAm/MBAAm = 4.6%, 1.2% for APS to the total mass of AAm + MBAAm and the concentration of TEMED to the total mass of AAm + MBAAm was 0.5%. The Cu(III) solution (0.0562 M) was prepared according to references (Zhang et al, 1999;Savina et al, 2005a,b). An appropriate amount of the Cu(III) solution and NaOH (1 M) were mixed as initiator, then pumped through the given cryogel column at a constant flow velocity of 1 cm/min.…”