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Synthesis, characterizations and thermal behavior of methyl methacrylate and N ‐( p ‐carboxyphenyl) methacrylamide/acrylamide copolymers
Author(s) -
Mishra Alpana,
Choudhary Veena
Publication year - 2000
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 - 10.1002/1097-4628(20001010)78:2<259::aid-app40>3.0.co;2-g
Subject(s) - methacrylamide , copolymer , polymer chemistry , methyl methacrylate , thermal stability , monomer , acrylamide , materials science , dimethylformamide , solvent , chemistry , polymer , organic chemistry , composite material
The synthesis, characterization, and thermal properties of copolymers of methyl methacrylate (MMA) and N‐( p ‐carboxyphenyl) methacrylamide/acrylamide (CPMA/CPA) are described. The copolymerization was carried out in solution by taking different mole fractions (0.1–0.5) of CPMA/CPA in the initial feed using azobisisobutyronitrile as an initiator and dimethylformamide as a solvent at 60°C. The copolymer composition was determined from 1 H‐NMR spectra by taking the ratio of the proton resonance signal due to the OCH 3 of MMA (δ = 3.59 ppm) and the aromatic protons (δ = 7.6–7.8 ppm) of CPMA/CPA. The monomer reactivity ratios of MMA:CPMA and MMA:CPA were determined using the Fineman Ross and Kelen Tudos methods and were found to be 1.32 ± 0.01 [MMA], 1.11 ± 0.02 [CPMA], 2.60 ± 0.01 [MMA], and 0.20 ± 0.01 [CPA]. Incorporation of these comonomers in the MMA backbone resulted in an improvement in the glass‐transition temperature and thermal stability. The percent char also increased with the increase of CPMA/CPA content in the copolymers. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 259–267, 2000