Synthesis, characterizations and thermal behavior of methyl methacrylate and N-(p-carboxyphenyl) methacrylamide/acrylamide copolymers

✍ Scribed by Alpana Mishra; Veena Choudhary

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 256 KB
• Volume: 78
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/1097-4628(20001010)78:2<259::aid-app40>3.0.co;2-g

✦ Synopsis

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 OOCH 3 of MMA (␦ ϭ 3.59 ppm) and the aromatic protons (␦ ϭ 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 Ϯ 0.01 [MMA], 1.11 Ϯ 0.02 [CPMA], 2.60 Ϯ 0.01 [MMA], and 0.20 Ϯ 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.