Nitroxide mediated living radical polymerization of styrene onto poly (vinyl chloride) |
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| Authors: | Mojtaba Abbasian Ali Akbar Entezami |
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| Affiliation: | 1. Laboratory of Polymer, Faculty of Chemistry, University of Tabriz, Tabriz, Iran;2. Laboratory of Polymer, Faculty of Chemistry, University of Tabriz, Tabriz, IranLaboratory of Polymer, Faculty of Chemistry, University of Tabriz, Tabriz, Iran. |
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| Abstract: | Nitroxide‐mediated ‘living’ free radical polymerisation (LREP) was employed for the first time to prepare graft copolymer by having arylated poly (vinyl chloride) (PVC‐Ph) as a backbone and polystyrene (PS) as branches. The graft copolymerization of styrene was initiated by arylated PVC carrying 2,2,6,6‐tetramethyl‐1‐piperidinyloxy (TEMPO) groups as a macroinitiator. Thus, the arylated PVC was prepared in the mild conditions and these reaction conditions could overcome the problem of gelation and crosslinking in polymers. Then, 1‐hydroxy TEMPO was synthesized by the reduction of TEMPO with sodium ascorbate. This functional nitroxyl compound was coupled with brominated arylated PVC (PVC‐Ph‐Br). The resulting macro‐initiator (PVC‐Ph‐TEMPO) for ‘living’ free radical polymerization was then heated in the presence of styrene to form graft copolymer. DSC, GPC, 1HNMR, and FT‐IR spectroscopy were employed to investigate the structure of the polymers. Copyright © 2007 John Wiley & Sons, Ltd. |
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| Keywords: | poly (vinyl chloride) living radical polymerization graft copolymer TEMPO polystyrene |
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