Fibers of Ultra-High Molecular Weight Polyethylene Obtained by Gel Spinning with Polyalphaolefin Oil

Chagas, Naiara Pirahi da Silva; Fraga, Geíza Lopes da Silva; Marques, Maria de Fátima Vieira

doi:10.1007/s13233-020-8147-4

Cited by 10 publications

(4 citation statements)

References 45 publications

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“…19,20 Some research efforts also paid great attention to new spinning solvents for UHMWPE. Da Silva Chagas et al 21,22 prepared UHMWPE fibers with polyalphaolefin oil as solvent by gel-spinning, the resultant fibers showed fewer entanglement, higher crystallinity and denser crystal orientation, but the tensile properties were not reported. Fang et al 23 also used polybutene as spinning solvent to prepare UHMWPE fibers, although high-strength fibers cannot be obtained, the extraction efficiency expresses better than that of gel-spun fibers with paraffin oil.…”

Section: Introductionmentioning

confidence: 99%

Enhanced tensile properties of ultra‐high molecular weight polyethylene fibers by solubility improvement with mixed solvents

Wang

et al. 2023

J of Applied Polymer Sci

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The tensile properties of ultra‐high molecular weight polyethylene (UHMWPE) fibers obtained from mixed solvents are addressed by virtue of improved solubility. In this work, olive oil (OO) was introduced as a poor solvent for the pre‐swelling of UHMWPE in decalin, and its mass percentage was intended to be 10, 20, 30, and 40 wt% of UHMWPE. Then UHMWPE fibers with high molecular weight retention and low entanglement were prepared with paraffin oil as spinning solvent by gel‐spinning and hot‐drawing. Unlike other samples, there is a more significant molecular chain disentanglement and higher molecular weight retention for UHMWPE fibers as OO addition is 20 wt%. Surprisingly, obtained UHMWPE fibers exhibit tensile strength up to 33.85 cN/dtex and tensile modulus of 1673.27 cN/dtex, with an increase of 24.0% and 32.3%, respectively, compared with that of UHMWPE fibers without decalin/OO pre‐swelling. Furthermore, the obtained UHMWPE fibers are accompanied by a marked improvement in melting temperature, crystallization and orientation.

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Section: Introductionmentioning

confidence: 99%

Enhanced tensile properties of ultra‐high molecular weight polyethylene fibers by solubility improvement with mixed solvents

Wang

et al. 2023

J of Applied Polymer Sci

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“…However, such research remains at the laboratory stage and has not yet met the requirements for industrial production. Currently, industrial and commercial UHMWPE resins still exist in a highly entangled state, resulting in high melt viscosity, poor flowability, and difficulties in processing and shaping during manufacturing. ,, To overcome this challenge, methods like blend modification, , gel spinning, − and compression molding ,− have been developed for UHMWPE processing. Among these, compression molding stands out as a nonflow processing method that largely reduces the limitations of poor UHMWPE flowability, making it one of the most straightforward processing techniques available .…”

Section: Introductionmentioning

confidence: 99%

Structural Evolution of High-Entanglement Ultrahigh Molecular Weight Polyethylene Films with Reserved Shish Crystals during the Hot Stretching Process

Zhong,

Chen,

Gao

et al. 2024

Macromolecules

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Shish crystals are a crucial crystal structure in ultrahigh molecular weight polyethylene (UHMWPE), composed of fully extended, nonentangled molecular chains, enabling the exceptional mechanical properties of low-dimensional UHMWPE products. During the molding process, precise control of the processing temperature allowed for the fabrication of high-entanglement UHMWPE films containing shish crystals. Rheological characterization revealed that the introduction of nonentangled shish crystals contributed to a partial reduction in the degree of entanglement in the UHMWPE films. Using in situ small-angle X-ray scattering (SAXS)/ultrasmall-angle X-ray scattering (USAXS)/wide-angle X-ray diffraction (WAXD), combined with ex situ SEM and DSC measurements, the structural evolution in highentanglement UHMWPE films with reserved shish crystals was investigated during hot stretching. The results indicated that the introduction of shish crystals contributed to the reduction of inclined lamellar stacking caused by high entanglement, thereby facilitating the transformation of inclined lamellae into shish-kebab crystals. Higher-temperature stretching resulted in a partial untangling of molecular chains, promoting molecular chain crystallization and orientation, thereby fostering the formation of additional shish-kebab crystals.

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“…11,12 Research on gel UHMWPE fibers has been relatively comprehensive, and researchers are still trying to improve the gel spinning process, such as treating UHMWPE suspensions with supercritical CO 2 13,14 and using polyalphaolefin as a new solution. 15 However, gel spinning uses a dilute UHMWPE solution and requires an extraction process, which requires a large amount of organic solvent. Therefore, it is necessary to develop a solvent-free melt-spinning technique (green processing) for producing high-performance UHMWPE fibers.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of high-density polyethylene content on the rheology, crystal structure, and mechanical properties of melt spun ultra-high-molecular weight polyethylene/high-density polyethylene blend fibers

Wang

Liu

et al. 2023

Journal of Industrial Textiles

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High-density polyethylene (HDPE) content significantly influences the structure and mechanical properties of ultrahigh molecular weight polyethylene (UHMWPE)/HDPE blend fibers. The molecular chain disentanglement and crystallization characteristics of as-spun filaments and fibers and how the structure affects the final mechanical properties of the fibers were thoroughly studied by adding different contents of HDPE. Dynamic mechanical analysis (DMA) and rheological analysis indicated that the molecular entanglement decreased with increasing HDPE content, improving the UHMWPE melt processability. Sound velocity orientation (SVO) studies indicated that the UHMWPE/HDPE as-spun filaments and fibers with an HDPE content of 40 wt% (U6H4) had a higher molecular chain orientation level. Furthermore, differential scanning calorimetry (DSC) and wide-angle X-ray diffraction (WAXD) analyses indicated that U6H4 had the highest crystallinity and the thinnest grains in the axial direction, respectively. The compact crystal structure and fully stretched molecular chains of U6H4 yielded the best mechanical properties. The present work disclosed the effect mechanism of HDPE contents on the preparation and properties of UHMWPE/HDPE fibers, which provided an effective and universal strategy for manufacturing high-strength UHMWPE/HDPE fibers with the melt spinning method.

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Fibers of Ultra-High Molecular Weight Polyethylene Obtained by Gel Spinning with Polyalphaolefin Oil

Cited by 10 publications

References 45 publications

Enhanced tensile properties of ultra‐high molecular weight polyethylene fibers by solubility improvement with mixed solvents

Enhanced tensile properties of ultra‐high molecular weight polyethylene fibers by solubility improvement with mixed solvents

Structural Evolution of High-Entanglement Ultrahigh Molecular Weight Polyethylene Films with Reserved Shish Crystals during the Hot Stretching Process

Influence of high-density polyethylene content on the rheology, crystal structure, and mechanical properties of melt spun ultra-high-molecular weight polyethylene/high-density polyethylene blend fibers

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