The effect of a nucleating agent on lamellar growth in melt-crystallizing polyethylene oxide

Details The effect of a nucleating agent on lamellar growth in melt-crystallizing polyethylene oxide The effect of a nucleating agent on lamellar growth in melt-crystallizing polyethylene oxide

2002-12-13

arxiv.org/abs/cond-mat/0212328v1

Physics

Condensed Matter

Soft Condensed Matter

submitted to Journal of Applied Physics (first version on 22 Apr 2002)

Scientific paper

10.1063/1.1564877

The effects of a (non co-crystallizing) nucleating agent on secondary nucleation rate and final lamellar thickness in isothermally melt-crystallizing polyethylene oxide are considered. SAXS reveals that lamellae formed in nucleated samples are thinner than in the pure samples crystallized at the same undercoolings. These results are in quantitative agreement with growth rate data obtained by calorimetry, and are interpreted as the effect of a local decrease of the basal surface tension, determined mainly by the nucleant molecules diffused out of the regions being about to crystallize. Quantitative agreement with a simple lattice model allows for some interpretation of the mechanism.

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