Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1408063 | Journal of Molecular Structure | 2007 | 12 Pages |
Abstract
Solution polymerization was carried out using AIBN as initiator at 60 °C and varying the molar infeed ratio to get different composition of 9-ethyl-3-hydroxymethylcarbazolyl acrylate-co-methacrylonitrile (C/N). The molecular weight was determined using gel-permeation chromatography (GPC). Differential scanning calorimetry (DSC) was used to determine the glass transition temperature (Tg). 13C{1H}, DEPT-45, 90 and 135 NMR techniques were used to distinguish the α-methyl, methine, backbone methylene and quaternary carbon resonance signals of C/N copolymers. Correlation of 1D (1H, 13C{1H}, DEPT) and 2D (HSQC, TOCSY, HMBC) NMR data were used to completely assign various overlapping and broad signals of C/N copolymers. Heteronuclear multi bond correlation (HMBC) studies were used to completely assign various nitrile resonances. The reactivity ratios calculated by Kelen-Tudos (KT) method were found to be rC = 0.31 ± 0.03 and rN = 0.80 ± 0.02 whereas those calculated from RREVM method were found to be rC = 0.35 and rN = 0.83, respectively.
Related Topics
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Authors
Ajaib Singh Brar, Sonia Gandhi,