Characteristics and Applications of Polymers - Crystallization

4 important questions on Characteristics and Applications of Polymers - Crystallization

How does crystallization occur in a molten polymer?

Crystallization starts with nucleation and a growth process.

What path does the time dependent crystallization follow?

When the fraction crystallized is plotted against the logarithm of time the plot will be S-shaped.

What is the Avrami equation?

The crystallized fraction y is a function of time t according to the Avrami equation: where k and n are time-independent constants.
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How is the extend of crystallization measured?

The crystallization is measured by specimen volume change because the liquid phase will have a different volume from the crystallized phase.

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