Abstract
The effects of time, temperature, physical ageing, and non-linear stresses on the viscoelastic properties of glass-forming polymers are analysed by using our molecular theory of glasses. The drastic slowing down of the relaxation processes from the liquid state to the glassy state can be explained in terms of the temperature-dependent physical ageing rate. We find that the loss tangent decreases with ageing time whose effect, however, diminishes at longer loading times. In the non-linear viscoelastic range, the theory also predicts that the stress relaxes faster in shear than in tension.
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References
T. S. CHOW, J. Chem. Phys. 79 (1983) 4602.
Idem, J. Polym. Sci. Polym. Phys. B25 (1987) 137.
T. S. CHOW, Macromol. 22 (1989) 701.
R. KOHLRAUSCH, Am. Phys. (Leipzig) 21 (1847) 393.
G. WILLIAMS and D. C. WATTS, Trans. Faraday Soc. 66 (1970) 80.
T. S. CHOW, Polymer 29 (1988) 1447.
Idem, in “Cross-Linked Polymers: Chemistry, Properties and Applications,” edited by R. J. Dickie, S. S. Labana and R. S. Bauer, ACS Series no. 367 (American Chemical Society, 1988) p. 124.
W. G. KNAUSS and V. H. KENNER, J. Appl. Phys. 51 (1980) 5131.
H. C. BOOJI and J. H. M. PALMEN, Polym. Engng Sci. 18 (1978) 781.
D. G. FESKO and N. W. TSCHOEGL, J. Polym. Sci. C35 (1971) 51.
L. C. E. STRUIK, “Physical Ageing in Amorphous Polymers and Other Materials” (Elsevier, Amsterdam, 1978).
J. G. CURRO, R. R. LAGASSE and R. SIMHA, J. Appl. Phys. 52 (1981) 5892.
M. CIZMECIOGLU, R. F. FEDORS, S. D. HONG and J. MOACANIN, Polym. Preprints 21 (2) (1980) 31.
S. MATSUOKA, Polym. J. 17 (1985) 321.
G. B. McKENNA and L. J. ZAPAS, in “Rheology”, Vol. 3 Application, edited by G. Astarita, G. Marucci and L. Nicolais (Plenum, New York, 1980) p. 299.
S. TURNER, in “The Physics of Glassy Polymers”, edited by R. H. Haward (Wiley, New York, 1973) p. 243.
T. S. CHOW, Polym. Engng Sci. 24 (1984) 915.
Idem, ibid. 24 (1984) 1079.
S. S. STERNSTEIN and T. C. HO, J. Appl. Phys. 43 (1972) 4370.
B. HARTMANN, J. Rheol. 30 (1986) 894.
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Chow, T.S. Viscoelastic properties of glass-forming polymers. J Mater Sci 25, 957–960 (1990). https://doi.org/10.1007/BF03372185
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DOI: https://doi.org/10.1007/BF03372185