Further studies on the high-speed gel-spinning of ultra-high molecular weight polyethylene

Pennings, A. J.; Roukema, Mees; Veen, A. van

doi:10.1007/bf01032453

Cited by 20 publications

(10 citation statements)

References 9 publications

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“…Among the solvents studied for gel‐spinning UHMWPE fiber, paraffin oil and decahydronaphthalene (also known as decalin) are arguably the most successful spin‐solvents used in industrial manufacturing. Furthermore, the strongest UHMWPE fibers reported were obtained using one of these solvents; the strength of which is higher than 4 GPa .…”

Section: Introductionmentioning

confidence: 95%

“…Besides, time and efforts have to be spent in optimization of the processing conditions if decalin is used as the solvent. As is reported, high strength fiber is usually obtained at a low spinning speed . However, as decalin is highly evaporative, skin‐core inhomogeneous “shish‐kebab” structure is formed at low spinning speeds, which will affect the drawability of the final fiber and the strength .…”

Section: Introductionmentioning

confidence: 96%

“…Common extraction solvents for paraffin oil include n‐hexane, diethyl ether, n‐pentane, methylene chloride, trichlorotrifluoroethane (TCTFE), dioxane, and toluene . Typically n‐hexane is used as an effective extraction solvent for achieving high strength . Since UHMWPE and paraffin oil have identical chemical repeat units, the interaction between paraffin oil and polyethylene is strong requiring more time to extract paraffin oil from the fiber with n‐hexane .…”

Section: Introductionmentioning

confidence: 99%

“…For decalin, the spin dope concentration can be lower, reaching 2% due to rapid evaporation that occurs immediately upon extrusion . With such a low concentration, super strong UHMWPE fibers can be obtained . Since decalin is volatile at the typical spinning temperatures, a second extraction solvent is not necessary.…”

Section: Introductionmentioning

confidence: 99%

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Gel spinning of UHMWPE fibers with polybutene as a new spin solvent

et al. 2016

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Gel spinning of UHMWPE fibers using low molecular weight polybutene (PB) as a new spin solvent was investigated. A 98/2 wt% PB/UHMWPE gel exhibits a melting temperature around 1158C and shows large-scale phase separation upon cooling the solution to room temperature. The resulting precursor fiber from this gel was hotdrawn to a ratio of 120, yielding a fiber with tensile strength of 4 GPa and Young's modulus of over 150 GPa. Wide-angle X-ray diffraction indicates good molecular orientation along the fiber axis. The results also demonstrate the potential to further improve the mechanical properties. With respect to the gel spinning industry, this new solvent has a number of advantages over paraffin oil and decahydronaphthalene, and holds a promise of greatly improving the process efficiency. POLYM. ENG. SCI., 56:697-706,

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Gel spinning of UHMWPE fibers with polybutene as a new spin solvent

et al. 2016

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“…The combination of new methods for making ultra-high molecular weight polyethylene (UHMWPE) with molecular weights approaching 10 7 Da, and gel spinning based techniques for making highly crystalline fibers from it, has led to the emergence of polyethylene fiber composites whose fiber strength can exceed 50% of the (approximately 7 GPa) theoretical strength of the PE molecule (Smith and Lemstra, 1980;Pennings et al, 1990;Wang and Smith, 1999). The fibers are typically combined with lower molecular weight thermoplastic polymers to form a unidirectional ply several fibers thick, Fig.…”

Section: Introductionmentioning

confidence: 99%

Defect controlled transverse compressive strength of polyethylene fiber laminates

O’Masta

Deshpande

Wadley

2015

International Journal of Solids and Structures

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a b s t r a c tUsing a combination of optical and ultrasonic imaging in conjunction with micro-X-ray tomography, we have identified the existence of two classes of defects in [0°/90°] cross-ply polymeric composites made from ultrahigh molecular weight polyethylene (UHMWPE) fibers and thermoplastic resins, and investigated their effects upon the transverse compressive strength of laminates of various thicknesses and lateral dimension. One defect type consisted of equal spaced tunnel cracks that resulted from anisotropic thermal contraction of the laminates after processing. The second consisted of void-like defects resulting from missing groups of fibers. Like the tunnel cracks, this defect extended many centimeters in a ply's fiber direction. While tunnel cracks were healed upon out of plane compression, and therefore have little effect on a laminates out of plane compressive strength, the missing fiber defects significantly degraded the compressive strength. However, the degradation was reduced by increasing the laminate thickness. Compression tests using pressure sensitive film and acoustic emission monitoring reveal that regions containing missing fiber defects are shielded from load by defect free regions, which then fail at lower sample pressure during loading. A simple statistical model is used to simulate the distribution of missing fiber defects as local reductions in ply thickness, and reproduced the contrast observed in optical and ultrasonic images, as well as the reduction in out of plane compressive strength observed in experiments.

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Irradiation of highly oriented polyethylene fibers in the atmosphere of some vinyl monomers: Effect on compressive strength

Amornsakchai

Wangsoub

Bualek-Limcharoen

2001

J. Appl. Polym. Sci.

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Highly oriented polyethylene fibers have been modified by γ‐irradiation in the presence of some vinyl monomer vapors, followed with further annealing in the atmosphere of the same monomer. Two types of vinyl monomers that are known to produce polymers with different glass transition temperatures, namely methyl methacrylate and vinyl acetate, were studied for their effect on the compressive strength of the fiber. It was found that a significant improvement in compressive strength, measured by tensile recoil test, was obtained. The level of improvement was affected by heat treatment and the presence of monomer during irradiation. Modification with vinyl acetate was found to be more effective than methyl methacrylate. These facts suggest that the improvement in compressive strength was attributable to several factors, including structural relaxation, the presence of graft copolymer, and energy dissipation ability of the graft copolymer. It is speculated that lateral integrity of the fiber is one of the key factors that prevents sliding of microfibril and possibly lateral or circumferential expansion of the fiber to accommodate kink band. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 79: 2494–2502, 2001

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Further studies on the high-speed gel-spinning of ultra-high molecular weight polyethylene

Cited by 20 publications

References 9 publications

Gel spinning of UHMWPE fibers with polybutene as a new spin solvent

Gel spinning of UHMWPE fibers with polybutene as a new spin solvent

Defect controlled transverse compressive strength of polyethylene fiber laminates

Irradiation of highly oriented polyethylene fibers in the atmosphere of some vinyl monomers: Effect on compressive strength

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