Microstructure determination of 9-ethyl-3-hydroxymethylcarbazolyl acrylate/methacrylonitrile using two-dimensional NMR spectroscopy

作者：Brar Ajaib Singh^*; Gandhi Sonia

来源：Journal of Molecular Structure, 2007, 832(1-3): 26-37.

DOI：10.1016/j.molstruc.2006.07.038

• NMR
• microstructure
• Photorefractive polymers-
• 9-ethyl-3-hydroxymethylcarbazolyl acrylate

Solution polymerization was carried out using AIBN as initiator at 60 degrees 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 (T-g). C-13{H-1}, DEPT-45, 90 and 135 NMR techniques were used to distinguish the alpha-methyl, methine, backbone methylene and quaternary carbon resonance signals of ON copolymers. Correlation of ID (H-1, C-13{H-1}, 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 foun

• 出版日期2007-4-30