Filler Network Change and Nonlinear Viscoelasticity of Rubbers

Abstract:

Uncured, filled rubbers show remarkable nonlinear viscoelasticity as well as cured, filled rubbers. The nonlinearity may come from change in entanglement and filler network structures. Many people use dynamic modulus to characterize rubber materials. However, dynamic modulus cannot be defined at large strain. Hence we must study a viscoelastic function to be defined at large strain. In addition, we need other information to separate the effects of the change in entanglement and filler network structures on nonlinear viscoelasticity. In this work, we have measured simultaneously relaxation modulus G(γ,t) and electrical resistivity ρ(γ,t) for carbon black (CB)-filled, uncured styrene-butadiene copolymers (SBRs) at wide range of strains. Electrical resistivity at equilibrium, ρ(0,t), showed step-like change at the CB loading between 20 and 35 phr, indicating threshold for filler network formation should exist in the range of values in CB loading. Both G(γ,t) and ρ(γ,t) for the samples having CB loading to be higher than the threshold showed nonlinearity at the strain larger than shear strain γ=0.1, indicating rupture in filler network at large strain.

• Periodical: Advanced Materials Research (Volumes 11-12)
• Pages: 729-732
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.11-12.729
• Online since: February 2006
• Authors: Yoshinobu Isono, Y. Satoh, Shuji Fujii, Seiichi Kawahara, S. Kagami
• Keywords: Carbon Black (CB), Electric Resistance, Filler Network, Nonlinear Viscoelasticity, Rubber

References

[1] C. Barre`s, A. Mongruel, M. Cartault and J.L. Leblanc: J. Appl. Polym. Sci. Vol. 87 (2003), p.31.

[2] G. Heinrich and M. Klueppel: Adv. Polym. Sci. Vol. 160 (2002), P. 1.

[3] J. Froehlich, W. Niedermeier and H. -D. Luginsland: Composites Part A, Appl Sci. Manufacturing Vol. 36A (2005), p.449.

[4] A.R. Payne: J. Appl. Polym. Sci. Vol. 6 (1962), p.57.

[5] Y. Isono, T. Oyama and S. Kawahara: Adv. Tech. Mat. Mat. Proc. J. Vol. 5 (2003), P. 84.

[6] Y. Isono and J.D. Ferry: Rubber Chem. Technol. Vol. 57 (19849, p.925.

[7] Y. Isono and J.D. Ferry: J. Rheol. Vol. 29 (1985), p.273.

[8] Y. Isono, K. Itoh, T. Komiyatani and T. Fujimoto: Macromolecules Vol. 24 (1991), p.4429.

[9] Y. Isono, K. Shizuru and T. Fujimoto: Macromolecules Vol. 24 (1991), p.4433.

[10] Y. Isono, H. Kawaura, T. Komiyatani and T. Fujimoto: Macromolecules Vol. 24 (1991), p.4437.

[11] Y. Isono: Nippon Gomu Kyokaishi Vol. 67 (1994), p.873.

[12] Y. Isono, N. Ohashi and T. Kase: Macromolecules Vol. 28 (1995), p.5154.

[13] Y. Isono and T. Nishitake: Polymer Vol. 36 (1995), p.1635.

[14] Y. Isono, T. Kamohara, A. Takano and T. Kase: Rheol. Acta Vol. 36 (1997), p.245.

[15] Y. Isono: AIP Conference Proceedings Vol. 469 (1999), p.639.

[16] Y. Isono, M. Tamada and S. Kawahara: ACS Rubber Div., 158th Meeting at Dallas, Paper No. 58 (2000).

[17] Y. Isono, S. Kawahara and T. Kase: Nihon Reoroji Gakkaishi Vol. 31 (2003), p.201.

[18] J. E. Mark: J. Phys. Chem. Vol. 107 (2003), p.903.

[19] J. Yamaguchi, J.C. Busfiels and A.G. Thomas: J. Polym. Sci., Part B, Polym. Phys. Vol. 41 (2003), p. (2079).

[20] J.C. Busfiled, A.G. Thomas and J. Yamaguchi: J. Polym. Sci., Part B, Polym. Phys. Vol. 42 (2004), p.2161.