Table of Contents
ISRN Polymer Science
Volume 2012 (2012), Article ID 352759, 13 pages
http://dx.doi.org/10.5402/2012/352759
Research Article

Polymers Based on Methacrylate Bearing Coumarin Side Group: Synthesis via Free Radical Polymerization, Monomer Reactivity Ratios, Dielectric Behavior, and Thermal Stabilities

1Department of Chemistry, Faculty of Science, University of Firat, 23119 Elazig, Turkey
2Department of Chemistry, Faculty of Arts and Sciences, University of Bitlis Eren, 13000 Bitlis, Turkey

Received 6 December 2011; Accepted 29 December 2011

Academic Editors: P. Dobrzynski, A. V. Popov, and I. Tomita

Copyright ยฉ 2012 Nursel Ayaz et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Copolymerization and homopolymerization of 7-methacryloyloxy coumarin (MAOC) and its copolymers with benzyl methacrylate (BMA), methyl methacrylate (MMA), ethyl methacrylate (EMA), and isobuthyl methacrylate (IBMA) were performed by the free radical polymerization method (FRP) at low conversions (<15%). The resulting polymers were characterized by FTIR, 1H NMR, GPC, DSC, and TGA. The monomer reactivity ratios of MAOC and BMA were computed using Kelen-Tรผdรถs (K-T) and Fineman-Ross (F-R) methods and were found to be ๐‘Ÿ1=0.45, ๐‘Ÿ2=1.29; ๐‘Ÿ1=0.46; ๐‘Ÿ2=1.33, respectively (๐‘Ÿ1 is monomer reactivity ratio of MAOC). Blends of poly(MAOC) and poly(BMA) obtained via FRP method were prepared by casting films from dichloromethane solution and were characterized by DTA and TGA techniques. Dielectric measurements for MAOC homopolymer and its copolymers with EMA, MMA, and IBMA were carried out by means of an impedance analyzer as a function of temperature and frequence. Dielectric properties of polymer samples prepared in a plate form were measured at room temperature over the frequency range 0.1โ€‰kHzโ€“2โ€‰MHz and given as compared with each other.