Determine values for the constants n and k (Equation 10.17) for the crystallization of polypropylene (Figure) at 160?C.

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y = 1 - exp(-kt") (10.17) 1.0 0.8 0.6 140°C 150°C 160°C 0.4 0.2 0.0 10 10 10? 104 Time (min) (Logarithmic scale) Nomalized frac tion crystallized