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γ-Irradiation Stimulated Change of Recycled Polypropylene Composites Dielectric Permittivity

Published online by Cambridge University Press:  26 February 2011

Ulmas Gafurov  and
Z. Fazilova
Ulmas Gafurov
Affiliation:
[email protected], Institute of Nuclear Physics, Composite Materials, Institute of Nuclear Physics, Tashkent Ulugbek, 702132, Uzbekistan, Tashkent, 102132, Uzbekistan, 998-71-1363482
Z. Fazilova
Affiliation:
[email protected], Institute of Nuclear Physics, Composite Materials, Tashkent, 102132, Uzbekistan
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Abstract

The γ-irradiation influence on dielectric permittivity (ε′) of recycled polypropylenes (PPR) and of thermoplastic composites γV TDV on its bases has been investigated. It was investigated follows thermoplastic composites: PPR+EPDM, PPR+EPDM+GTR, PPR+EPDM+GTR/plast; EPDM -ethylene-propylene diamine. The permittivity increasing up to dose ∼ 100 kGy one can explained of radiation stimulated peroxide radicals formation, processes of cross-linking and increase of ordering, crystallinity degree. It is supported the measurements of the IR spectra of irradiated samples and by the data of X-ray diffraction measurements.

The dielectric permittivity for the PPR+EPDM and PPR+EPDM+GTR/plast composites have little change up to the dose of γ-irradiated 1500 kGy and the composites have stable dielectric properties. The stable properties is defined the radiation stable of polymer (PPR) matrix. The dose raise more lead to the permittivity decreasing for the plasticized composite PPR+EPDM+GTR/plast. It is result of crystallinity degree reduction and by plasticization of destruction products.

Keywords

dielectricpolymercomposite
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 969: Symposium W – Heterogeneous Integration of Materials for Passive Components and Smart Systems , 2006 , 0969-W03-09
Copyright
Copyright © Materials Research Society 2007

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