Dielectric α- and β-relaxations in uncured styrene butadiene rubber

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The development of the dynamic glass transition in styrene-butadiene copolymers has been investigated by dielectric spectroscopy in the frequency range from 10-2 to 106 Hz. Two processes were detected and attributed to the α- and β-relaxations. The α relaxation time has a non-Arrhenius temperature b...

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Autor principal: Cerveny, S.
Otros Autores: Bergman, R., Schwartz, G.A, Jacobsson, P.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2002
Acceso en línea:Registro en Scopus
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100 1 |a Cerveny, S. 
245 1 0 |a Dielectric α- and β-relaxations in uncured styrene butadiene rubber 
260 |c 2002 
270 1 0 |m Cerveny, S.; Universidad de Buenos Aires, Depto. Fisica, LPMPyMC, Pabellon 1, Buenos Aires, Argentina 
506 |2 openaire  |e Política editorial 
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520 3 |a The development of the dynamic glass transition in styrene-butadiene copolymers has been investigated by dielectric spectroscopy in the frequency range from 10-2 to 106 Hz. Two processes were detected and attributed to the α- and β-relaxations. The α relaxation time has a non-Arrhenius temperature behavior that is highly dependent on styrene content while the β relaxation time shows an Arrhenius behavior with an activation energy that is independent of styrene-content. Furthermore, the shape of the α-relaxation is strongly influenced by the styrene content while the shape of β-relaxation is not. We interpret these results as follows. The observed β-relaxation is primarily due to local motions of butadiene monomers and therefore not affected by the presence of styrene. The α-relaxation, on the other hand, is highly sensitive to the styrene content due to its cooperative character.  |l eng 
593 |a Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Depto. Fisica, LPMPyMC, Pabellon 1, Buenos Aires, Argentina 
593 |a Department of Experimental Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden 
690 1 0 |a ARRHENIUS BEHAVIOR 
690 1 0 |a DIELECTRIC SPECTROSCOPY 
690 1 0 |a STYRENE BUTADIENE RUBBER 
690 1 0 |a ACTIVATION ENERGY 
690 1 0 |a CHEMICAL RELAXATION 
690 1 0 |a COMPOSITION 
690 1 0 |a COPOLYMERS 
690 1 0 |a DIELECTRIC PROPERTIES 
690 1 0 |a GLASS TRANSITION 
690 1 0 |a POLYBUTADIENES 
690 1 0 |a POLYSTYRENES 
690 1 0 |a SPECTROSCOPIC ANALYSIS 
690 1 0 |a RUBBER 
700 1 |a Bergman, R. 
700 1 |a Schwartz, G.A. 
700 1 |a Jacobsson, P. 
773 0 |d 2002  |g v. 35  |h pp. 4337-4342  |k n. 11  |p Macromolecules  |x 00249297  |w (AR-BaUEN)CENRE-21  |t Macromolecules 
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856 4 0 |u https://doi.org/10.1021/ma010990o  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_00249297_v35_n11_p4337_Cerveny  |y Handle 
856 4 0 |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00249297_v35_n11_p4337_Cerveny  |y Registro en la Biblioteca Digital 
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962 |a info:eu-repo/semantics/article  |a info:ar-repo/semantics/artículo  |b info:eu-repo/semantics/publishedVersion 
999 |c 66301 

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