Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

In situ SAXS-WAXS Temperature Evolution Study of the Nanostructure of Self-Reinforced Ultra High Molecular Weight Polyethylene (UHMWPE)

Version 1 : Received: 8 November 2023 / Approved: 9 November 2023 / Online: 9 November 2023 (07:44:07 CET)

How to cite: Statnik, E.S.; Gorshkova, Y.E.; Salimon, A.I.; Zherebtsov, D.D.; Kaloshkin, S.D.; Korsunsky, A.M. In situ SAXS-WAXS Temperature Evolution Study of the Nanostructure of Self-Reinforced Ultra High Molecular Weight Polyethylene (UHMWPE). Preprints 2023, 2023110594. https://doi.org/10.20944/preprints202311.0594.v1 Statnik, E.S.; Gorshkova, Y.E.; Salimon, A.I.; Zherebtsov, D.D.; Kaloshkin, S.D.; Korsunsky, A.M. In situ SAXS-WAXS Temperature Evolution Study of the Nanostructure of Self-Reinforced Ultra High Molecular Weight Polyethylene (UHMWPE). Preprints 2023, 2023110594. https://doi.org/10.20944/preprints202311.0594.v1

Abstract

Ultra high molecular weight polyethylene (UHMWPE) is a thermoplastic high-performance polymer in high demand for biomedicine, ship and machine building, anthropomorphic robots and smart prostheses. Highly oriented UHMWPE fibers possess record specific strength and may also be used for the fabrication of self-reinforced PE-PE composites (SRPEC). The temperature evolution study of the small-angle X-ray scattering (SAXS) signature of the supramolecular structure of UHMWPE can help reveal their important role in the mechanism of the shape memory effect in SRPEC. The laboratory SAXS–WAXS beamline XEUSS 3.0 was used for in situ studies of the nanostructure parameters in unidirectional SRPEC. Namely, the radius of gyration and the dimensionality factor were extracted from 2D SAXS patterns using several fitting algorithms. Significant changes of these parameters occurred in temperature ranges that correspond to the initiation of the shape memory effect and melting. The relationship between the material anisotropy and 2D SAXS patterns are discussed in the context of the supramolecular structure evolution.

Keywords

Self-reinforced composite (SRC); Ultra-high Molecular Weight Polyethylene (UHMWPE); in situ heating; nanostructure; SAXS-WAXS; Shape Memory Effect (SME)

Subject

Chemistry and Materials Science, Materials Science and Technology

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