Abstract
The fact that, in polymer crystallization, nucleation might be accompanied by large scale density fluctuations has been investigated for the flow‐induced crystallization of isotactic poly‐1‐butene (PB‐1). Small Angle Light Scattering (SALS) was applied to measure density and orientation fluctuations, whereas complementary results were obtained from optical microscopy. The observations seem to indicate that the detected density fluctuations result from the presence of weakly anisotropic structures, rather than being an indication of densification before the onset of crystallization. In addition, the present work provides a critical review of polymer crystallization studies using SALS.
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