Kinetics of Particle Formation at the Graft Polymerization of Methylacrylate onto Hydroxyethyl Cellulose

Kislenko, V. N.

doi:10.1006/jcis.1998.5854

Cited by 4 publications

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“…The graft copolymerization of various monomers onto cellulose has been reported using radiation, , redox systems, , transition metal ions, and their chelates as initiating agencies. The extent of grafting is also affected by the physical structure of cellulose. , Although various monomers such as 4-vinylpyridene, alkylacrylates, , styrene, and acrylamide have been used for cellulose modifications, studies on graft copolymerization of ethyl acrylate onto cellulose are not reported frequently . The grafting efficiency of ethyl acrylate onto carboxymethyl cellulose in comparison to other monomers has been reported, but extent of grafting has not been explained by determining other grafting parameters .…”

Section: Introductionmentioning

confidence: 99%

Graft Copolymerization of Ethyl Acrylate onto Cellulose Using Ceric Ammonium Nitrate as Initiator in Aqueous Medium

2002

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Ceric ammonium nitrate (CAN) in the presence of nitric acid has been used as efficient initiator for graft copolymerization of the ethyl acrylate onto cellulose at 35.0 +/- 0.1 degrees C. Graft copolymerization of ethyl acrylate onto cellulose has taken place through the radical initiation process. The graft yield and other grafting parameters have been evaluated by varying concentration of ethyl acrylate from 2.5 x 10(-1) to 15.0 x 10(-1) mol dm(-3) and ceric ammonium nitrate from 5.0 x 10(-3) to 25.0 x 10(-3) mol dm(-3) at constant concentration of the nitric acid (8.0 x 10(-2) mol dm(-3)). The rate of graft copolymerization has shown 1.5 order with respect to the concentration of the ceric ammonium nitrate. The graft copolymerization data obtained at different temperatures were used to calculate the energy of activation, which has been found to be 28.9 kJ mol(-1) within the temperature range from 20 to 50 degrees C. The effect of addition of cationic and anionic surfactants on graft copolymerization has also been studied. On the basis of the experimental observations, reaction steps have been proposed and a suitable rate expression for graft copolymerization has been derived.

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