Dielectric and Thermal Behavior of Ethyl and Butyl Methacrylate and N-p-cyano-phenyl Maleimide Copolymers

N-p-Cyano-phenyl maleimide PCPMI was prepared and copolymerized with ethyl and butyl methacrylate in order to study the effect of introducing a strong dipole along the polymer backbone. The copolymer composition was determined by elemental analysis and ^sup 1^H NMR spectroscopy. The molecular mass o...

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Bibliographic Details
Published in:Journal of polymer research 2005-02, Vol.12 (1), p.61-66
Main Authors: Elsabee, M Z, Bamezai, R K, Hempel, E, Kresse, H
Format: Article
Language:English
Subjects:
Copolymerization
Copolymers
Dielectrics
Differential scanning calorimetry
Frequency ranges
Glass transition temperature
Mathematical analysis
NMR spectroscopy
Polymers
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Summary:N-p-Cyano-phenyl maleimide PCPMI was prepared and copolymerized with ethyl and butyl methacrylate in order to study the effect of introducing a strong dipole along the polymer backbone. The copolymer composition was determined by elemental analysis and ^sup 1^H NMR spectroscopy. The molecular mass of the copolymers was determined by GPC. The glass transition temperature was measured and it was found to correlate well with the chemical structure, and increases with the increase of the maleimide content. The dielectric behavior of the homo methacrylate polymers and the copolymers was measured in the frequency range of 0.01 Hz to 10 MHz at different temperatures. The dielectric data were compared with the two Cole-Cole parameters equation. The glass transition temperature obtained from DSC measurements agreed well with the dielectric relaxation data.[PUBLICATION ABSTRACT]
ISSN:1022-9760
1572-8935
DOI:10.1007/s10965-004-1873-z