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Influence of Reinforcing Systems on Thermal Aging Behaviors of NR Composites
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  • Journal title : Elastomers and Composites
  • Volume 46, Issue ,3,  2011, pp.237-244
  • Publisher : The Rubber Society of Korea
 Title & Authors
Influence of Reinforcing Systems on Thermal Aging Behaviors of NR Composites
Choi, Sung-Seen ; Kim, Jong-Chul ;
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Five natural rubber (NR) composites with different reinforcing systems of unfilled, carbon black, carbon black with silane coupling agent, silica, and silica with silane coupling agent were thermally aged and change of the crosslink densities by the accelerated thermal aging was investigated. The crosslink densities on the whole increased as the aging time elapsed irrespective of the reinforcing systems. The crosslink density changes became noticeable by increasing the aging temperature. For carbon black-filled composites, the silane coupling agent made the crosslink density change to be increased. For silica-filled composites, however, the silane coupling agent made the crosslink density increment reduced at 60 and and it hardly affect the degree of the crosslink density change at 80 and . The activation energies for the crosslink density changes of the carbon black-filled samples increased continuously in a logarithmic fashion, whereas that of the silica-filled one showed a quasi-steady state ranges at aging times of 30-150 days. The activation energy of the unfilled sample increased exponentially with the aging time. The experimental results were explained with sulfur donation from the silane coupling agent, surface modification of the filler by the silane coupling agent, adsorption of curative residues on the silica surface, and release of the adsorbed curative residues.
NR composite . thermal aging . reinforcing system . crosslink density change
 Cited by
EPDM, IIR, 그리고 BIIR 내후성 고무 복합체의 열노화 거동,최성신;김종철;

엘라스토머 및 콤포지트, 2012. vol.47. 2, pp.148-155 crossref(new window)
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