1992
DOI: 10.1016/0032-3861(92)90779-v
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Role of ceric ion in the heterogeneous graft polymerization of olefins on cellulose

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Cited by 30 publications
(14 citation statements)
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“…[13][14][15] The aim of the present study was to develop a redox radical polymerization of ACA initiated by a redox mechanism in order to design a new method of synthesis of biodegradable drug carrier system consisting of polysaccharide decorated PACA nanoparticles. This polymerization was designed using the couple polysaccharide and cerium(IV) ions as the redox radical polymerization initiator according to Casinos 16 and to Passirani et al 17 The main interest of developing a new method for the synthesis of PACA is to obtain new properties regarding the in vivo fate of the nanoparticles. PACA nanoparticles obtained by the anionic polymerization according to the method of Couvreur et al 12 are rapidly cleared from the bloodstream by macrophage uptake.…”
Section: Introductionmentioning
confidence: 99%
“…[13][14][15] The aim of the present study was to develop a redox radical polymerization of ACA initiated by a redox mechanism in order to design a new method of synthesis of biodegradable drug carrier system consisting of polysaccharide decorated PACA nanoparticles. This polymerization was designed using the couple polysaccharide and cerium(IV) ions as the redox radical polymerization initiator according to Casinos 16 and to Passirani et al 17 The main interest of developing a new method for the synthesis of PACA is to obtain new properties regarding the in vivo fate of the nanoparticles. PACA nanoparticles obtained by the anionic polymerization according to the method of Couvreur et al 12 are rapidly cleared from the bloodstream by macrophage uptake.…”
Section: Introductionmentioning
confidence: 99%
“…It is worthwhile noting that N-acryloyl sugar derivatives have a higher reactivity in radical reactions than allyl glycosides which have been also copolymerized with acrylamide. [57] The formation of free radicals on polysaccharide backbone by oxidation with cerium IV is a convenient route to initiate the graft polymerization of olefins from cellulose [58] or starch. [59] The mechanism involves the formation of a complex between ceric ions and hydroxyl groups followed by its disproportionation which generates an aldehyde or ketone and a free radical through the CÀC bond cleavage of 1,2-diol.…”
mentioning
confidence: 99%
“…[59] The mechanism involves the formation of a complex between ceric ions and hydroxyl groups followed by its disproportionation which generates an aldehyde or ketone and a free radical through the CÀC bond cleavage of 1,2-diol. [58,60] It has been shown that grafting on polysaccharide chains occurs predominantly at the reducingend hemiacetal group and at the C2ÀC3 glycol groups in anhydroglucose units. [61] Few studies reported on the use of cerium oxidation for synthesizing block copolymers from polysaccharides.…”
mentioning
confidence: 99%
“…Another interesting reaction of Ce 4+ with starch takes place at the hemiacetal reducing end of the starch molecule, where the reaction with Ce 4+ is much faster than at the 1,2‐diols in the body of the starch chains 8, 10. Contrary to our previous work using oligosaccharides,11 the starches used in this work are amylopectins with molecular weights of the order of 10 7 to 10 8 .…”
Section: Introductionmentioning
confidence: 76%
“…However, it is well known that Ce 4+ creates free‐radical graft sites on starch and cellulose, primarily at C2 and C3 carbons 6, 8, 9. Molecular modeling studies suggest that, following β‐scission, alkyl radicals may be formed on C1, C2, C3, and C4 carbons on the main chain 10…”
Section: Introductionmentioning
confidence: 99%