Autocatalytic Oxidative Polymerization of Indene by Cobalt Porphyrin Complex and Kinetic Investigation of the Polymerization of Styrene

Nanda, AK and Kishore, K (2001) Autocatalytic Oxidative Polymerization of Indene by Cobalt Porphyrin Complex and Kinetic Investigation of the Polymerization of Styrene. In: Macromolecules, 34 (6). pp. 1600-1605.

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Abstract

This is the first report on the oxidative polymerization of indene using cobalt(II) tetraphenyl porphyrin pyridine [Co(II)TPP(Py)] complex, which led to the formation of poly(indene peroxide), PINDP,having narrow polydispersity. The polymerization was carried out at room temperature and low oxygen pressure. The dual behavior of Co(II)TPP(Py) as a dioxygen carrier as well as an initiator was investigated.The mechanism of polymerization is described and supported from the kinetic analysis, UV-visible, ESR,and $^1H NMR$ studies. The rate of formation of PINDP is higher for Co(II)TPP(Py) catalyzed polymerization compared to the usual free radical, AIBN, initiated polymerization. The stability of PINDP was estimated from its rate of degradation and compared with other related vinyl polyperoxides. The PINDP was further used as a peroxide macroinitiator for the polymerization of styrene. The polymerization obeys classical kinetics. The $K^2$ values of the peroxide macroinitiator was determined, which reveals that it can also be used at higher temperature for the polymerization. An “active” polystyrene was also synthesized, containing peroxy segments at the chain ends.

Item Type:	Journal Article
Publication:	Macromolecules
Publisher:	American Chemical Society
Additional Information:	Copyright belongs to American Chemical Society
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	04 Dec 2008 10:12
Last Modified:	19 Sep 2010 04:52
URI:	http://eprints.iisc.ac.in/id/eprint/16569

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