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Microstructure determination of methyl methacrylate‐ N ‐arylsubstituted itaconimide copolymers by NMR spectroscopy
Author(s) -
Chauhan Rashmi,
Choudhary Veena
Publication year - 2009
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.30824
Subject(s) - comonomer , copolymer , monomer , polymer chemistry , materials science , reactivity (psychology) , methyl methacrylate , methacrylate , solvent , nuclear magnetic resonance spectroscopy , chemistry , polymer , organic chemistry , medicine , alternative medicine , pathology , composite material
Abstract This article describes the homopolymerization and copolymerization of methyl methacrylate with N ‐(5‐chloro‐2‐methoxyphenyl)itaconimide (OMCPI)/ N‐ (5‐chloro‐3‐methoxyphenyl)itaconimide (MCPI) monomers using AIBN as an initiator and THF as solvent at 60°C. Feed compositions having varying mole fractions of OMCPI and MCPI ranging from 0.1 to 0.5 were taken to prepare copolymers. Structural characterization of homopolymers and copolymers thus obtained was done using FT‐IR, 1 H‐NMR, and elemental analysis. Copolymer composition was determined using percent nitrogen content. Comonomer reactivity ratios were determined using Kelen‐Tüdos and non‐linear error in variable model (EVM) method using RREVM computer program. Carbonyl carbon signals of MMA (M) as well as N‐ aryl itaconimide (I) copolymers in the 13 C{ 1 H}‐NMR spectra were used for the determination of sequence distribution of M ‐and I ‐centered triads. Sequence distribution of M ‐ and I ‐ centered triads calculated using 13 C{ 1 H}‐NMR spectra are in good agreement with the theoretically calculated values using Harwood's model. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010