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New Flexible High Gamma Dose Dosimeter Based on Luminescent and Biodegradable Polymer Blend

Published online by Cambridge University Press:  15 November 2013

T. Schimitberger ,
M.R. Franco ,
F.A. Lopes ,
P.S. Curti ,
R.F. Bianchi  and
L.O. Faria
T. Schimitberger
Affiliation:
Departamento de Engenharia Nuclear, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, 31270-970 Belo Horizonte, MG, Brazil.
M.R. Franco
Affiliation:
Laboratório de Polímeros e Propriedades Eletrônicas de Materiais, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, 35400-000 Ouro Preto, MG, Brazil.
F.A. Lopes
Affiliation:
Laboratório de Polímeros e Propriedades Eletrônicas de Materiais, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, 35400-000 Ouro Preto, MG, Brazil.
P.S. Curti
Affiliation:
Laboratório de Polímeros e Propriedades Eletrônicas de Materiais, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, 35400-000 Ouro Preto, MG, Brazil.
R.F. Bianchi
Affiliation:
Laboratório de Polímeros e Propriedades Eletrônicas de Materiais, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, 35400-000 Ouro Preto, MG, Brazil.
L.O. Faria
Affiliation:
Centro de Desenvolvimento da Tecnologia Nuclear, Av. Antônio Carlos 6627, C.P. 941, 31270-901 Belo Horizonte, MG, Brazil.
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Abstract

In this work we investigate the radio-degradation of MEH-PPV polymer film as a tool for measuring high doses of gamma radiation. In order to produce film samples with thickness in the micron range, we have mixed the photoluminescent poly(2-methoxy-5(2'-ethylhexyloxy)-p-phenylenevinylene) copolymer (MEH-PPV) with a biodegradable poly(butylene adipate-co-terephthalate) copolymers (PBAT). The system was irradiated with a Co-60 source with doses ranging from 1 to 1,000 kGy. Ultraviolet-visible (UV-Vis) and photoluminescence (PL) spectroscopy have been used to investigate the radiation induced changes in the absorption and photon-emission spectra of the irradiated samples. Results indicate that the PL emission intensity varies exponentially with the applied gamma radiation dose for doses ranging from 30 to 500 kGy. The unambiguous relationship between PL & Dose together with the good flexibility of the copolymer films indicate that MEH-PPV/PBAT blends have great potential for applications in high gamma dose dosimetry.

Keywords

optical propertiespolymerluminescence
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1576: Symposium WW – Nuclear Radiation Detection Materials , 2013 , mrss13-1576-ww04-06
Copyright
Copyright © Materials Research Society 2013 

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References

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