Manufacturing of Single-Polymer Composite Materials Based on Ultra-High Molecular Weight Polyethylene Fibers by Hot Compaction

Zherebtsov, Dmitry D.; Chukov, Dilyus I.; Torokhov, Valerii; Statnik, Eugene S.

doi:10.1007/s11665-020-04582-7

Cited by 17 publications

(15 citation statements)

References 13 publications

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“…In contrast, UTS trans in the transverse direction gradually grows from 4.1 MPa to 16.5 MPa with compaction temperature enhancing the volume fraction of isotropic molten PE matrix, since the mechanical load is transferred through the matrix when a unidirectional composite is extended in the transverse direction. Similar tendency for both directions was observed for unidirectional PE-based SRCs at bending test [ 21 ].…”

Section: Resultssupporting

confidence: 79%

“…In addition to standard conditions, hot compaction was carried out at two regimes: Regime 1 —10 min at a certain molding pressure and temperature; Regime 2 —8 min at molding pressure, then 2 min of release of molding pressure down to ambient pressure, and then return to molding pressure for immediate start of cooling. According to the Clausius–Clapeyron relation [ 21 ], elevated pressure shifts the melting temperature to a higher value. Conversely, pressure reduction promotes fiber melting.…”

Section: Methodsmentioning

confidence: 99%

“…SRCs based on UHMWPE manufactured by hot compaction were studied since the end of 1990s until recently [ 11 , 18 , 19 , 20 , 21 ], and the influence of hot compaction conditions on the properties of SRCs has been reported. However, the processing—structure—properties—performance interrelation has not been understood fundamentally.…”

Section: Introductionmentioning

confidence: 99%

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On the Structural Peculiarities of Self-Reinforced Composite Materials Based on UHMWPE Fibers

et al. 2021

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The structure of self-reinforced composites (SRCs) based on ultra-high molecular weight polyethylene (UHMWPE) was studied by means of Wide-Angle X-ray Scattering (WAXS), X-ray tomography, Raman spectroscopy, Scanning Electron Microscopy (SEM) and in situ tensile testing in combination with advanced processing tools to determine the correlation between the processing conditions, on one hand, and the molecular structure and mechanical properties, on the other. SRCs were fabricated by hot compaction of UHMWPE fibers at different pressure and temperature combinations without addition of polymer matrix or softener. It was found by WAXS that higher compaction temperatures led to more extensive melting of fibers with the corresponding reduction of the Herman’s factor reflecting the degree of molecular orientation, while the increase of hot compaction pressure suppressed the melting of fibers within SRCs at a given temperature. X-ray tomography proved the absence of porosity while polarized light Raman spectroscopy measurements for both longitudinal and perpendicular fiber orientations showed qualitatively the anisotropy of SRC samples. SEM revealed that the matrix was formed by interlayers of molten polymer entrapped between fibers in SRCs. Moreover, in situ tensile tests demonstrated the increase of Young’s modulus and tensile strength with increasing temperature.

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Section: Resultssupporting

confidence: 79%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the Structural Peculiarities of Self-Reinforced Composite Materials Based on UHMWPE Fibers

et al. 2021

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“…However, these materials do not align with the true concept of self-reinforcement and cannot be applied to biomedical applications [31]. In our previous paper, a method for the production of SRC materials based on UHMWPE fibers was proposed [32]. The developed technique is focused on hot compaction of UHMWPE fibers, which allows avoiding the relaxation processes resulting in a decrease in mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Self-Reinforced Composite Materials Based on Ultra-High Molecular Weight Polyethylene

et al. 2020

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The properties of hybrid self-reinforced composite (SRC) materials based on ultra-high molecular weight polyethylene (UHMWPE) were studied. The hybrid materials consist of two parts: an isotropic UHMWPE layer and unidirectional SRC based on UHMWPE fibers. Hot compaction as an approach to obtaining composites allowed melting only the surface of each UHMWPE fiber. Thus, after cooling, the molten UHMWPE formed an SRC matrix and bound an isotropic UHMWPE layer and the SRC. The single-lap shear test, flexural test, and differential scanning calorimetry (DSC) analysis were carried out to determine the influence of hot compaction parameters on the properties of the SRC and the adhesion between the layers. The shear strength increased with increasing hot compaction temperature while the preserved fibers’ volume decreased, which was proved by the DSC analysis and a reduction in the flexural modulus of the SRC. The increase in hot compaction pressure resulted in a decrease in shear strength caused by lower remelting of the fibers’ surface. It was shown that the hot compaction approach allows combining UHMWPE products with different molecular, supramolecular, and structural features. Moreover, the adhesion and mechanical properties of the composites can be varied by the parameters of hot compaction.

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“…A much stiffer and costly but 3D-printable polymer, polyetheretherketone (PEEK) recently entered the field as a strong competitor of UHMWPE in biomedical applications, presenting a number of challenges for the companies engaged in the materials synthesis and end product fabrication . In contrast with PEEK, UHMWPE is shaped mainly via hot moulding, although extrusion and mechanical cutting has proved the ability to form strong self-reinforced composites [1,2], architected and hierarchically structured hybrids with bioinert Ti [3], PEEK [4], HAp and collagen hybrids for advanced implants mimicking cartilage [5][6][7], cortical and trabecular bone tissues within a single component.…”

mentioning

confidence: 99%

Multi-Scale Digital Image Correlation Analysis of In Situ Deformation of Open-Cell UHMWPE Foam

Statnik¹,

Dragu²,

Besnard³

et al. 2020

Preprint

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Porous ultra-high molecular weight polyethylene (UHMWPE) is a high performance bioinert polymer used in cranio-facial reconstructive surgery in procedures where relatively low mechanical stresses arise. As an alternative to much stiffer and costly polyether-ether-ketone (PEEK) polymer, UHMWPE finds further wide application in hierarchically structured hybrids for advanced implants mimicking cartilage, cortical and trabecular bone tissues within a single component. The mechanical behaviour of open-cell UHMWPE sponges obtained through sacrificial desalination of hot compression-moulded UHMWPE-NaCl powder mixtures shows a complex dependence on the fabrication parameters and microstructural features. In particular, similarly to other porous media it displays significant inhomogeneity of strain that readily localises within deformation bands that govern the overall response. In this article, we report advances in the development of accurate experimental techniques for operando studies of the structure-performance relationship applied to the porous UHMWPE medium with pore sizes of about 250 µm that are most well-suited for live cell proliferation and fast vascularization of implants. Samples of UHMWPE sponges were subjected to in situ compression using a micromechanical testing device within Scanning Electron Microscope (SEM) chamber, allowing the acquisition of high-resolution image sequences for Digital Image Correlation (DIC) analysis. Special masking and image processing algorithms were developed and applied to reveal the evolution of pore size and aspect ratio. Key structural evolution and deformation localisation phenomena were identified at both macro- and micro-structural levels in the elastic and plastic regimes. The motion of pore walls was quantitatively described, and the presence and influence of strain localisation zones were revealed and analysed using DIC technique.

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Manufacturing of Single-Polymer Composite Materials Based on Ultra-High Molecular Weight Polyethylene Fibers by Hot Compaction

Cited by 17 publications

References 13 publications

On the Structural Peculiarities of Self-Reinforced Composite Materials Based on UHMWPE Fibers

On the Structural Peculiarities of Self-Reinforced Composite Materials Based on UHMWPE Fibers

Hybrid Self-Reinforced Composite Materials Based on Ultra-High Molecular Weight Polyethylene

Multi-Scale Digital Image Correlation Analysis of In Situ Deformation of Open-Cell UHMWPE Foam

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