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(1)Quiz Polymer Microscopy Lab 1) Explain what a spherulite is, what causes spherulitic bands

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Quiz Polymer Microscopy Lab

1) Explain what a spherulite is, what causes spherulitic bands.

2) Explain in detail the conditions needed to observe a Maltese Cross in optical micrographs of spherulites.

3) Write the Avrami Equation and explain how the Avrami plot results from this equation.

What does the Avrami exponent mean? (explain different values in detail)

4) How do you measure the linear growth rate for spherulites? Why would it be linear in time?

5) Explain what a plot of linear growth rate, log G versus crystallization temperature, Tc, might yield. Explain what Regimes I, II and III are in spherulitic growth.

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• Please write your answers on numbered pages. Write your name on each page. Start a separate page for each new question. Additional pages with your draft work, rough calculations