Problem

In Figure 15.28, the logarithm of Er(t) versus the logarithm of time is plotted for PMMA a...

In Figure 15.28, the logarithm of Er(t) versus the logarithm of time is plotted for PMMA at a variety of temperatures. Plot log Er(10) versus temperature and then estimate its Tg.

Figure 15.28 Logarithm of relaxation modulus versus logarithm of time for poly(methyl methacrylate) between 40°C and 135°C.

(From J. R. McLoughlin and A. V. Tobolsky, J. Colloid Sci., 7, 555, 1952. Reprinted with permission.)

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Solutions For Problems in Chapter 7

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