Catalytic radical polymerization of vinyl monomers by cobalt porphyrin complex and metamorphosis of block-into-block copolymer

Nanda, AK and Kishore, K (2001) Catalytic radical polymerization of vinyl monomers by cobalt porphyrin complex and metamorphosis of block-into-block copolymer. In: Polymer, 42 (6). pp. 2365-2372.

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Abstract

This is the first report on the catalytic room temperature free-radical polymerization of vinyl monomers, namely styrene (STY)and methyl methacrylate (MMA) using Co(II)TPP(Py) and aerial oxygen as a catalyst and a co-catalyst, respectively. The mechanism of polymerization has been investigated using 1H NMR, differential scanning calorimeter (DSC), thermogravimetric (TGA) and gel permeation chromatography (GPC) analysis and a radical pathway for the polymer formation is proposed. The rate of polymerization for the synthesis of active polymers of STY is higher than that of MMA, which has also been supported by computational studies. The active polymer, polystyrene (PS)–poly(styrene peroxide) (PSP) was also used for the synthesis ofanother block copolymer, PS-b-PMMA, by reacting PS–PSP with MMA. The mechanism of block copolymerization is discussed.

Item Type:	Journal Article
Publication:	Polymer
Publisher:	Elsevier Science
Additional Information:	Copyright belongs to Elsevier Science
Keywords:	Catalytic;Active polymers;Block copolymer
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	15 Dec 2008 11:16
Last Modified:	19 Sep 2010 04:53
URI:	http://eprints.iisc.ac.in/id/eprint/16630

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