Evaluation of the polymer-solvent interaction parameter χ for the system cured styrene butadiene rubber and toluene

One of the most popular cured rubbers used in industrial applications is styrene butadiene rubber (SBR) and frequently its network structure is studied by means of swelling techniques in solvent. Normally, toluene is used as solvent in this test. In order to estimate the crosslink density from the e...

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Autor principal: Marzocca, Angel José
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Publicado: 2007
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100 1 |a Marzocca, Angel José 
245 1 0 |a Evaluation of the polymer-solvent interaction parameter χ for the system cured styrene butadiene rubber and toluene 
260 |c 2007 
270 1 0 |m Marzocca, A.J.; Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Física, Pabellón 1, Buenos Aires (1428), Argentina; email: marzo@df.uba.ar 
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506 |2 openaire  |e Política editorial 
520 3 |a One of the most popular cured rubbers used in industrial applications is styrene butadiene rubber (SBR) and frequently its network structure is studied by means of swelling techniques in solvent. Normally, toluene is used as solvent in this test. In order to estimate the crosslink density from the equilibrium volume fraction of rubber in the swollen state, the correct evaluation of the Flory-Huggins interaction parameter χ is necessary. This work covers the swelling behavior of cured SBR in toluene. The rubber was vulcanized with different amounts sulfur and accelerator at 433 K in order to obtain several network structures and crosslink densities. Network characterisations of the compounds were made by swelling measurements in the frame of the Flory-Rehner relationship using the molecular weight of the network chain between chemical crosslinks obtained previously by mechanical tests. A relationship between χ and vr, the polymer volume fraction at equilibrium (maximum) degree of swelling, was established for the cured SBR/toluene system. It was found that χ is not a constant but depends on the crosslink density in the sample. The types of crosslinks in these samples where estimated applying this function to the swelling behavior of the compounds previously treated with the thiol probe method. © 2007 Elsevier Ltd. All rights reserved.  |l eng 
536 |a Detalles de la financiación: Universidad de Buenos Aires 
536 |a Detalles de la financiación: X808 
536 |a Detalles de la financiación: The present work was supported in by the University of Buenos Aires (Research Proyect X808). The author wish to thank FATE SAICI (Argentina) for the cooperation in the development of this research. 
593 |a Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Física, Pabellón 1, Buenos Aires (1428), Argentina 
690 1 0 |a CROSSLINKING 
690 1 0 |a FLORY-HUGGINS INTERACTION PARAMETER 
690 1 0 |a STYRENE BUTADINE RUBBER 
690 1 0 |a SWELLING 
690 1 0 |a TOLUENE 
690 1 0 |a BUTADIENE 
690 1 0 |a CROSSLINKING 
690 1 0 |a SOLVENTS 
690 1 0 |a STYRENE 
690 1 0 |a SWELLING 
690 1 0 |a TOLUENE 
690 1 0 |a VOLUME FRACTION 
690 1 0 |a VULCANIZATION 
690 1 0 |a CROSSLINK DENSITY 
690 1 0 |a FLORY-HUGGINS INTERACTION PARAMETERS 
690 1 0 |a STYRENE BUTADIENE RUBBER 
690 1 0 |a RUBBER 
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