Mechanical Properties of Isotactic Polypropylene with Oriented and Cross-hatched Lamellae Structure

A. Kech; H.-C. Ludwig; B. Möginger; P. Eyerer; J. deClaville Christiansen

doi:10.1515/ipp-2000-0012

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Mechanical Properties of Isotactic Polypropylene with Oriented and Cross-hatched Lamellae Structure

A. Kech , H.-C. Ludwig , B. Möginger , P. Eyerer und J. deClaville Christiansen

Veröffentlicht/Copyright: 23. Februar 2022

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Aus der Zeitschrift International Polymer Processing Band 15 Heft 2

Abstract

The mechanical properties of injection moulded unreinforced isotactic, polypropylene depend on the crystalline structure and lamellae orientation. Push-pull processing is an injection moulding technique that allows the user to produce parts with oriented structures. Mostly applied for short fibre reinforced thermoplastics in order to align fibres parallel to the flow direction, this technique can also be used to orient the polymeric matrix of LCP and polypropylene. A comparison of mechanical properties as well as investigations on morphology between the samples produced using conventional injection moulding and push-pull processing are presented trying to improve the knowledge about this so far rather unknown technique.

* Mail address: A. Kech, Institute for Polymer Testing and Polymer Science, University of Stuttgart, Pfaffenwaldring 32, D-70569 Stuttgart, Germany

Acknowledgements

The authors would like to kindly acknowledge the funding of most parts of this work by the EC, the DFG and the Danish Technical Research Council.

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Received: 1999-06-07

Accepted: 2000-01-20

Published Online: 2022-02-23

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https://doi.org/10.1515/ipp-2000-0012