Artículo
Abstract:
A study of the thermal behavior of cured elastomeric blends of natural rubber (NR) and styrene butadiene rubber (SBR) prepared by solution blending in toluene is presented. Binary blends with different compositions of NR/SBR were produced using a conventional cure system based on sulfur and TBBS (n-t-butyl-2-benzothiazole sulfonamide as accelerator. The compounds were vulcanized at 433 K up to an optimum time of cure determined by rheometric tests. From swelling tests, the crosslink densities of the compounds were obtained and compared with those obtained in similar blends prepared by mechanical mixing. The results were analyzed in terms of the disentangling of the chain structures of the SBR and NR phases and the achieved cure state of the blend. Using differential scanning calorimetry, the glass transition temperature T g of each blend was measured. In most compounds, the value of T g corresponding to each phase of the blend was determined, but in some blends a single value of T g was obtained. The variation of T g with the composition and cure level in each phase was analyzed. On the other hand, a physical mixture of two equal parts of NR and SBR vulcanized was measured and the results were compared to those of the NR50/SBR50 cured blend. Besides, to analyze the influence of the network structure, pure NR and SBR unvulcanized samples were measured. On the basis of all the obtained results, the influence of the interphase formed in the blend between SBR and NR phases is discussed. Copyright © 2011 Wiley Periodicals, Inc.
Registro:
| Documento: | Artículo |
| Título: | A study about the structure of vulcanized natural rubber/styrene butadiene rubber blends and the glass transition behavior |
| Autor: | Mansilla, M.A.; Silva, L.; Salgueiro, W.; Marzocca, A.J.; Somoza, A. |
| Filiación: | LPyMC, Departamento de Física, Universidad de Buenos Aires, C1428EGA, Buenos Aires, Argentina Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina IFIMAT, Facultad de Ciencias Exactas, UNCentro, Pinto 399, 7000 Tandil, Argentina Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Calle 526 entre 10 y 11, 1900, La Plata, Argentina |
| Palabras clave: | blends; crosslinking; differential scanning calorimetry (DSC); glass transition; Binary blends; blends; Butadiene rubber; Chain structure; Cross-link densities; Cu-Re system; Cure state; Cured blends; differential scanning calorimetry (DSC); Elastomeric blends; Glass transition behavior; Mechanical mixing; Network structures; Physical mixtures; Single-value; Solution blending; Styrene butadiene rubber; Swelling test; Thermal behaviors; Blending; Crosslinking; Curing; Differential scanning calorimetry; Styrene; Sulfur; Sulfur compounds; Toluene; Glass transition |
| Año: | 2012 |
| Volumen: | 125 |
| Número: | 2 |
| Página de inicio: | 992 |
| Página de fin: | 999 |
| DOI: | http://dx.doi.org/10.1002/app.36321 |
| Título revista: | Journal of Applied Polymer Science |
| Título revista abreviado: | J. Appl. Polym. Sci. |
| ISSN: | 00218995 |
| CODEN: | JAPNA |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00218995_v125_n2_p992_Mansilla |
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Citas:
---------- APA ----------
Mansilla, M.A., Silva, L., Salgueiro, W., Marzocca, A.J. & Somoza, A. (2012) . A study about the structure of vulcanized natural rubber/styrene butadiene rubber blends and the glass transition behavior. Journal of Applied Polymer Science, 125(2), 992-999.http://dx.doi.org/10.1002/app.36321
---------- CHICAGO ----------
Mansilla, M.A., Silva, L., Salgueiro, W., Marzocca, A.J., Somoza, A. "A study about the structure of vulcanized natural rubber/styrene butadiene rubber blends and the glass transition behavior" . Journal of Applied Polymer Science 125, no. 2 (2012) : 992-999.http://dx.doi.org/10.1002/app.36321
---------- MLA ----------
Mansilla, M.A., Silva, L., Salgueiro, W., Marzocca, A.J., Somoza, A. "A study about the structure of vulcanized natural rubber/styrene butadiene rubber blends and the glass transition behavior" . Journal of Applied Polymer Science, vol. 125, no. 2, 2012, pp. 992-999.http://dx.doi.org/10.1002/app.36321
---------- VANCOUVER ----------
Mansilla, M.A., Silva, L., Salgueiro, W., Marzocca, A.J., Somoza, A. A study about the structure of vulcanized natural rubber/styrene butadiene rubber blends and the glass transition behavior. J. Appl. Polym. Sci. 2012;125(2):992-999.http://dx.doi.org/10.1002/app.36321
