Application of Time-Temperature-Stress Superposition Principle to Nonlinear Creep of Poly(methyl methacrylate)

Abstract:

Article Preview

The uniaxial tensile creep of a commercial grade Poly(methyl methacrylate) was measured for 4000 seconds under various temperatures and stress levels ranging from 14 oC to 26 oC and 6 MPa to 32 MPa. The resultant creep compliance curves depart from each other for stresses beyond a critical value which varies with temperature, indicating nonlinear viscoelastic behavior. The time-temperature-stress superposition principle (TTSSP) was used to construct a smooth master compliance curve with a much longer time-scale interval from the short-term tests at higher stresses and temperatures. It is shown that the master curve covers a period of over 290 days, which is nearly 3.9 decades longer than the test duration. Moreover, it is verified that the time-temperature shift factors are dependent on stresses at which the shifts are applied, and that the time-stress shift factors are dependent on reference temperatures.

Info:

Periodical:

Key Engineering Materials (Volumes 340-341)

Edited by:

N. Ohno and T. Uehara

Pages:

1091-1096

Citation:

W. B. Luo et al., "Application of Time-Temperature-Stress Superposition Principle to Nonlinear Creep of Poly(methyl methacrylate)", Key Engineering Materials, Vols. 340-341, pp. 1091-1096, 2007

Online since:

June 2007

Export:

Price:

$38.00

[1] R.A. Schapery: Polym. Eng. Sci. Vol. 9(4)(1969), p.295.

[2] G.U. Losi and W.G. Knauss: Polym. Eng. Sci. Vol. 32(8) (1992), p.542.

[3] W. Luo, T-Q. Yang, and Q. An: Acta Mechanica Solida Sinica, Vol. 14(3) (2001), p.195.

[4] W. Brostow: Mater. Res. Innov. Vol. 3 (2000), p.347.

[5] J. Kolark and A. Pegoretti: Polymer Vol. 47 (2006), p.346.

[6] J. Lai and A. Bakker: Polymer, Vol. 36(1) (1995), p.93.

[7] S. Jazouli, W. Luo, F. Bremand and T. Vu-Khanh: J. Mat. Sci., Vol. 41(2006), p.531.

[8] M. Hadid, S. Rechak and A. Tati: Mat. Sci. Eng. A , Vol. 385(2004), p.54.

[9] S. -C. Yen, and F.L. Williamson: Compos. Sci. Technol. Vol. 38(1990), p.103.

[10] C.C.M. Ma, N.H. Tai, and S.H. Wu et. al.: Composites Part B Vol. 28B (1997) p.407.