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Influence of processing conditions on polymer crystallization measured by fast scanning DSC

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Abstract

The structural formation of polymers during processing significantly influences the mechanical properties and the temperature stability of polymer products. The analysis of structural formation by conventional thermal analysis techniques is limited because of the relatively low scanning rates. Thus, reorganization during heating changes the initial structure, and the applicable cooling rates are not representative for the applied cooling rates during production, i.e., crystallization at high supercooling cannot be investigated. To overcome these limitations, chip calorimeters with very high scanning rates have been developed. The fast scanning Flash DSC 1 based on MEMS chip-sensors allows for scanning rates up to 40,000 K s−1. In this paper, we discuss some basic concepts of chip calorimetry in general. We then study the influence of additives and molecular modifications on the structural formation at technically relevant cooling rates. This information is crucial to adapt polymer formulation and processing conditions to specific product requirements.

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Acknowledgements

The author is grateful to his colleagues at Elke Hempel for providing the measurements on PBT.

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Authors and Affiliations

  1. Mettler-Toledo AG, Sonnenbergstrasse 74, 8603, Schwerzenbach, Switzerland

    J. E. K. Schawe

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  1. J. E. K. Schawe
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Correspondence to J. E. K. Schawe.

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Schawe, J.E.K. Influence of processing conditions on polymer crystallization measured by fast scanning DSC. J Therm Anal Calorim 116, 1165–1173 (2014). https://doi.org/10.1007/s10973-013-3563-8

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  • DOI: https://doi.org/10.1007/s10973-013-3563-8

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