Question: T, C 5 Using isothermal stress relaxation data at various temperatures, shift factors have been measured for a polymer material as shown in the

T, C 5 Using isothermal stress relaxation data at various temperatures, shift

T, C 5 Using isothermal stress relaxation data at various temperatures, shift factors have been measured for a polymer material as shown in the table below: log10 aT -0.33 0 0.00 -5 0.34 -10 0.69 -15 1.06 -20 1.44 -25 1.84 2.26 -30 (20)Plot log at vs. T(C) and compare with WLF equation with Tg = -35C. (Note that Tref=0.)

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