Small Angle Scattering During Isothermal Crystallization

1 Small Angle Scattering During Isothermal Crystallization 

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Answers to these questions can be obtained if one performs small angle scattering measurements during isothermal crystallization. Such measurements have been performed on different materials. The results were observed to depend strongly on the material used. So, for example, with increasing crystallization time, the long period increased with polyethylene, it decreased with polyethylene terephthalate and it stayed constant with poly-P-hydroxybutyrate. 

Measurements were performed up to now during isothermal crystallization at 117 °C of an initially amorphous film. Fig. 43 shows the scattering power Q = S I(s) ds of the small angle scattering as well as the degree of crystallinity obtained from wide angle scattering as a function of crystallization time. 

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