Kinetics and mechanism of radical graft polymerization of monomers onto polysaccharides

Berlin, A.A.; Kislenko, V. N.

doi:10.1016/0079-6700(92)90010-v

Cited by 53 publications

(17 citation statements)

References 71 publications

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“…Graft polymerization of insaturated monomers (vinyl monomers) onto cellulose, in water media, is one of the universal, effective and accessible methods of radical polymerization. A large quantity of articles about graft polymerization, properties and process kinetics are reviewed [5,12,13]. It is necessary to take into consideration metal ion interactions with monomers and water in the formation of corresponding radicals.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Acrylic Acid-Grafted Cellulose in Aqueous Medium With Radical Initiators

Neira¹,

Tarraga²,

Catalan³

2008

J. Chil. Chem. Soc.

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The chemical modification of cellulose by grafting reaction with Acrylic Acid (AA) considering different reaction factors was investigated. Natural polymers such as Santa Fe Cellulose, Microcrystalline Cellulose (Avicell) and Secondary Pulp were studied as substrates. pH effect; Ce (IV), Mn(VII) and Fenton as initiators; time and temperature polymerization were investigated. Grafting reachs a maximum, 90 % graft, at pH 7. A medium to weak C=O band at 1715 cm -1 for carboxylic group in FTIR spectroscopy is presented. Santa Fe and Avicel cellulose grafted whith AA at 17 hours are degraded. Secondary pulp with Fenton at 50-60 and 70 ºC at 17 hours are degraded too. The degradation of polymers at long reaction times at 17 hours and 70ºC were analized by FTIR spectroscopy and electronic microscopy analysis (SEM).

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Section: Introductionmentioning

confidence: 99%

Degradation of Acrylic Acid-Grafted Cellulose in Aqueous Medium With Radical Initiators

Neira¹,

Tarraga²,

Catalan³

2008

J. Chil. Chem. Soc.

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“…We believe that the main effect of the hydrogel templates involves formation of polymer-metal complexes, and the following reduction of silver ions by the hydroxymethyl fragments. The interaction between the hydroxymethyl group of the hydrogel network and Ag þ leads to proton separation, reduction of the silver cation, and formation of a macroradical [30] (Scheme 1). This process is called a oneelectron reduction mechanism.…”

Section: Resultsmentioning

confidence: 99%

Reactive Hydrogel Networks for the Fabrication of Metal–Polymer Nanocomposites

Tarnavchyk

Voronov

Kohut

et al. 2009

Macromol. Rapid Commun.

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In this study, highly stable gold and silver nanoparticles evenly distributed within a crosslinked poly(acrylamide)/poly(N-(hydroxymethyl)acrylamide) (PAAm-PHMAAm) network have been fabricated without addition of a reducing agent. Remarkably, the same chemical hydrogel composition has been involved in the successful fabrication of spherical gold and silver nanoparticles within the hydrogel template. The hydrogel network acts simultaneously as an efficient reducing agent and stabilizer. The PAAm-PHMAAm hydrogel network binds metal ions and, following reduction of bound to crosslinked template metal ions, proceeds via oxidation of hydroxymethyl hydrogel fragments. A one-electron mechanism is proposed for the formation of the silver and gold nanoparticles.

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“…(7,8) that the graft polymerization of methylacrylate onto hydroxyethyl cellulose proceeds according to first order with respect to the monomer. …”

Section: Discussionmentioning

confidence: 98%

“…Eq. [7] has been obtained by neglecting the fraction of the oligomer radicals which cannot form polymer particles by a conformation changing of the chain (where k ϭ 1-8).…”

Section: Theoreticalmentioning

confidence: 99%

Kinetics and mechanism of radical graft polymerization of monomers onto polysaccharides

Cited by 53 publications

References 71 publications

Degradation of Acrylic Acid-Grafted Cellulose in Aqueous Medium With Radical Initiators

Degradation of Acrylic Acid-Grafted Cellulose in Aqueous Medium With Radical Initiators

Reactive Hydrogel Networks for the Fabrication of Metal–Polymer Nanocomposites

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

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