Abstract
The Time Temperature Superposition Principle was applied to the stress relaxation isotherms of two samples of poly(ethylene-g-styrene). The graft copolymers were prepared by mutual irradiation of polyethylene powder and styrene monomer in a nuclear reactor source, one containing 26% (PEGS/26) and the other 58% styrene (PEGS/58). The shift factor data when plotted versus the reciprocal of temperature yielded a straight line in the region of -20°C to 70°C with an activation energy of 32 kcal/mole. From the viscoelastic master curves the relaxation spectra were determined by the second approximation method. The dynamic moduli computed by the interconversion technique can then be shifted from the logarithmic time axis to temperature axis by using the shift factor data obtained in stress relaxation isotherms. The calculated curves were compared with the experimental dynamic mechanical data. Agreement was semiquantitative for the storage moduli, but only qualitative for the loss moduli.
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© 1977 Plenum Press, New York
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Diamant, J., Hansen, D.R., Shen, M. (1977). Viscoelastic Properties of Poly(Ethylene-G-Styrene). In: Klempner, D., Frisch, K.C. (eds) Polymer Alloys. Polymer Science and Technology, vol 10. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-0874-4_31
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DOI: https://doi.org/10.1007/978-1-4684-0874-4_31
Publisher Name: Springer, Boston, MA
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