Electron-spin-resonance study of electron-bombarded polymer electrets. I. Radical formation, piezoelectric and pyroelectric effects

Journal Article · Wed Aug 15 04:00:00 EDT 1979 · Phys. Rev., B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.20.1720· OSTI ID:5953386

Dreyfus, G; Lewiner, J; Legrand, M

This paper reports the first part of a microscopic investigation of the electret effect by electron spin resonance (ESR). Polypropylene films were electron bombarded and their ESR spectra recorded either under vacuum or in the presence of air. It is shown that large amounts of radicals are formed, due to the breaking of bonds. The influence of air on these radicals is studied, and it is demonstrated that the irradiated part of the polymer is highly sensitive to oxidation. The latter process gives rise to polar species, which are shown to be responsible for the piezoelectric and pyroelectric effects of polypropylene which were observed some years ago.

• Research Organization: Laboratoire d'Electricite Generale, Ecole Superieure de Physique et de Chimie Industrielles, 10, rue Vauquelin, 75005 Paris, France
• OSTI ID: 5953386
• Journal Information: Phys. Rev., B: Condens. Matter; (United States), Journal Name: Phys. Rev., B: Condens. Matter; (United States) Vol. 20:4; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360406* -- Materials-- Polymers & Plastics-- Radiation Effects-- (-1987)
CHEMICAL REACTIONS
COLLISIONS
DIELECTRIC MATERIALS
ELECTRETS
ELECTRICITY
ELECTRON COLLISIONS
ELECTRON SPIN RESONANCE
FILMS
MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDATION
PHYSICAL RADIATION EFFECTS
PIEZOELECTRICITY
POLYMERS
POLYOLEFINS
POLYPROPYLENE
PYROELECTRIC EFFECT
RADIATION EFFECTS
RADICALS
RESONANCE