Influence of the blend composition in the internal friction of NR/SBR compounds

Mechanical dynamic measurements were used in this work to analyze the behavior of cured, carbon black-filled NR/SBR blends using a sulfur/accelerator system. The loss tangent (tan δ) of the compounds was studied in the frequency range between 10-3 and 10 Hz and temperatures between 80 and 260 K. Mea...

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Detalles Bibliográficos
Autores principales: Ghilarducci, A., Cerveny, S., Salva, H., Matteo, C.L., Marzocca, A.J.
Formato: JOUR
Materias:
Automated subresonant forced pendulum
NR/SBR blends
Sulfur/accelerator system
Butadiene
Carbon black
Composition effects
Curing
Glass transition
Internal friction
Relaxation processes
Rubber
Styrene
Temperature
Loss tangent
Phase network
Polymer blends
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09483276_v54_n7-8_p382_Ghilarducci
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:Mechanical dynamic measurements were used in this work to analyze the behavior of cured, carbon black-filled NR/SBR blends using a sulfur/accelerator system. The loss tangent (tan δ) of the compounds was studied in the frequency range between 10-3 and 10 Hz and temperatures between 80 and 260 K. Measurements were performed with an automated sub-resonant forced pendulum. A new model was applied to loss tangent data, based on the consideration of the phase network. A secondary transition (β relaxation) appears in the blends at temperatures between 100 K and 160 K, in addition to the glass transition. This peak is analyzed in terms of the rotation of the cis and vinyl units from butadiene of SBR.

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