Gel‐spinning of ultra‐high molecular weight polyethylene by a twin‐screw extruder with an ultra‐large length‐to‐diameter ratio

Jian, Wang; Hu, Xin; Liu, Fangke; Long, Zhibin; Shao, Mingwang

doi:10.1002/pen.26143

Cited by 2 publications

(3 citation statements)

References 30 publications

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“…A higher feed rate resulted in increased shear forces that benefit materials that require intense mixing. However, this can also cause overheating and material degradation if not properly managed (Thyashan et al, 2024;Wang et al, 2022).…”

Section: Literature Reviewmentioning

confidence: 99%

Flow Analysis and Shear Rate Comparison of Counter-rotating and Co-rotating Intermeshing Twin-screw Extruders for Filament Extrusion of Polypropylene-based Biocomposites

Hidayat Syah Lubis,

Abdul Kudus,

Amran

et al. 2024

JST

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This study investigates and compares the performance of counter-rotating and co-rotating intermeshing twin-screw designs in filament extruder machines. The research sought to determine whether the counter-rotating intermeshing design with its opposite flow direction offers advantages over the co-rotating intermeshing design in terms of flow analysis and shear rates. Flow analysis was conducted to examine the velocity of the polypropylene-based biocomposite material inside the barrel. Shear rate data was obtained by evaluating the relationship between shear rate and screw speed to assess the stability and maximum shear rate of the twin-screw extruders. The results revealed that the counter-rotating intermeshing twin-screw extruders exhibited higher shear rates and more consistent pressure compared to the co-rotating intermeshing design. The superiority of the counter-rotating extruder was attributed to its opposite flow direction and distinct thread shapes, facilitating efficient material compression and improved dispersion of polymer-based biocomposite materials. The study suggested the potential for further exploration and refinement of the counter-rotating intermeshing twin-screw extruder design, particularly in producing polypropylene-based biocomposite filaments for Fused Deposition Modeling (FDM) machines.

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Section: Literature Reviewmentioning

confidence: 99%

Flow Analysis and Shear Rate Comparison of Counter-rotating and Co-rotating Intermeshing Twin-screw Extruders for Filament Extrusion of Polypropylene-based Biocomposites

Hidayat Syah Lubis,

Abdul Kudus,

Amran

et al. 2024

JST

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“…Due to the lack of TSEs with ultra-high L / D ratios (>100), people must use multiple extrusion cycles to improve residence time and material homogeneity. ,− The “extrusion evolution,” led by the TSE, will continue . Specially designed support elements have been developed and can be used to achieve an ultra-high L / D ratio (>100). , …”

Section: Introductionmentioning

confidence: 99%

“…28 Specially designed support elements 32 have been developed and can be used to achieve an ultra-high L/D ratio (>100). 33,34 To prepare high-quality PAN nascent fibers, we created a TSE with an ultra-high L/D ratio of 150. The dry-jet wet spinning process was carried out.…”

Section: Introductionmentioning

confidence: 99%

Application of a Twin-Screw Extruder with an Ultra-High Length-to-Diameter Ratio in the Dry-Jet Wet Spinning Process of Polyacrylonitrile Nascent Fibers

Jian

Zheng

et al. 2023

Ind. Eng. Chem. Res.

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The quality of nascent fiber is the primary factor determining the performance of polyacrylonitrile (PAN)-based carbon fibers. This work presented a novel twin-screw extruder (TSE) with an ultra-high screw length-to-diameter (L/D) ratio for the dry-jet wet spinning process of high-quality PAN nascent fibers. The TSE with an ultra-high L/D ratio of up to 150 enabled the homogeneous mixing of PAN powder and dimethyl sulfoxide (DMSO), resulting in improved dope concentration of up to 30 wt %, improved molecular chain disentanglement, and reduced void formation. Orthogonal experiments were conducted to analyze the influence of dope concentration, barrel temperature, and screw speed on the properties of the PAN nascent fibers. Especially, three L/D ratios of 64, 96, and 150 were established to clarify the influence of the L/D ratio. It was found that with the increase in the L/D ratio from 64 to 150, the average tensile strength and modulus of the PAN nascent fibers were improved by 42.1 and 67.2%, respectively, and the crystallinity was increased by 45.5%. The PAN nascent fibers produced using the TSE with the ultra-high L/D ratio were found to have dense and smooth surfaces and fewer microvoid defects. It demonstrated the innovativeness and potential industrial application of the ultra-high L/D technique in the manufacturing of high-quality PAN-based carbon fibers.

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Gel‐spinning of ultra‐high molecular weight polyethylene by a twin‐screw extruder with an ultra‐large length‐to‐diameter ratio

Cited by 2 publications

References 30 publications

Flow Analysis and Shear Rate Comparison of Counter-rotating and Co-rotating Intermeshing Twin-screw Extruders for Filament Extrusion of Polypropylene-based Biocomposites

Flow Analysis and Shear Rate Comparison of Counter-rotating and Co-rotating Intermeshing Twin-screw Extruders for Filament Extrusion of Polypropylene-based Biocomposites

Application of a Twin-Screw Extruder with an Ultra-High Length-to-Diameter Ratio in the Dry-Jet Wet Spinning Process of Polyacrylonitrile Nascent Fibers

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