Dielectric relaxation behavior of some ethylene‐methacrylic acid copolymers and their methyl esters | Zendy

Neumann R. M. | Zendy; Macknight W. J. | Zendy

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Dielectric relaxation behavior of some ethylene‐methacrylic acid copolymers and their methyl esters

Author(s) -

Neumann R. M.,

Macknight W. J.

Publication year - 1978

Publication title -

journal of polymer science: polymer symposia

Language(s) - English

Resource type - Journals

eISSN - 1936-0959

pISSN - 0360-8905

DOI - 10.1002/polc.5070630124

Subject(s) - copolymer , relaxation (psychology) , dielectric , methacrylic acid , materials science , dipole , ethylene , polymer chemistry , dielectric loss , infrared , yield (engineering) , methyl methacrylate , chemistry , organic chemistry , optics , polymer , composite material , physics , catalysis , optoelectronics , psychology , social psychology

Ethylene‐methacrylic acid copolymers containing two different concentrations of the acid groups have been studied by dielectric relaxation and infrared techniques. The infrared measurements, used to determine the number of acid dimers present at a given temperature, indicate a sufficient number of free COOH dipoles present to account for the magnitude of the observed β dielectric relaxation (frequency plane) in both copolymer systems. Dielectric measurements on the methyl ester derivatives of the abov́e copolymers yield dispersions of unusual width, which precluded attempts to estimate the number of ester dipoles participating in the relaxation. A possible explanation for this behavior is advanced.

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