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Crystallization kinetics of polyamide 11 in the presence of sepiolite and montmorillonite nanofillers

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An Erratum to this article was published on 22 June 2016

Abstract

The crystallization kinetics of polyamide 11 (PA 11) in the presence of sepiolite and organo-modified montmorillonite nanofillers has been studied in a wide range of temperatures and cooling rates by conventional differential scanning calorimetry (DSC) and fast scanning chip calorimetry (FSC). The presence of the nanofillers has a negligible effect on the crystallization temperature of PA 11 at low cooling rates. However, at rapid cooling conditions a distinct nucleating effect of the nanofillers is detected. The critical cooling rate to suppress crystallization increases from 600 K s−1 to about 1000 and 3000 K s−1 in nanocomposites containing sepiolite and montmorillonite, respectively. Regardless of the cooling rate applied for solidification of the melt, in the nanocomposites the crystallinity of PA 11 is 5–10 % higher than in neat PA 11, with the highest values obtained for the montmorillonite-containing system. The nucleating effect of the nanofillers onto the crystallization of the PA 11 is confirmed by analysis of the half-times of isothermal crystallization and by analysis of the spherulitic superstructure. All measurements proved a saturation of the nucleation efficiency at a loading of the nanofiller of 2.5 m%.

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Acknowledgments

Financial support by the Deutsche Forschungsgemeinschaft (DFG) (grant AN 212/18) is gratefully acknowledged.

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Correspondence to René Androsch.

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Jariyavidyanont, K., Focke, W. & Androsch, R. Crystallization kinetics of polyamide 11 in the presence of sepiolite and montmorillonite nanofillers. Colloid Polym Sci 294, 1143–1151 (2016). https://doi.org/10.1007/s00396-016-3874-y

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  • DOI: https://doi.org/10.1007/s00396-016-3874-y

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