Structure and Mechanical Properties of Ultrahigh Molecular Weight Polyethylene Deformed Near Melting Temperature

Nakayama, K.; Furumiya, A.; Okamoto, T.; Yagi, K.; Kaito, A.; Choe, C. R.; G.,; L.,; Liu, D.; T.,; Nakajima, A.

doi:10.1515/iupac.63.0112

Cited by 2 publications

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“…As is well known, the tensile properties of UHMWPE/ HDPE blends are closely related to the crystallinity of the materials. 2,19,20,[23][24][25][26][27] Figure 3 and Table 2 show the DSC curves and crystallinity data of the standard tensile specimens for each blend. The crystallinity of blends 2 and 4 increased by 5.18% and 8.57%, respectively, compared with blend 1.…”

Section: Dsc Analysismentioning

confidence: 99%

Enhanced melt flow UHMWPE/HDPE blends melt spinning and performance study

Wang,

Liu,

Qin

et al. 2024

Polymer Engineering & Sci

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The extremely low melt flowability of ultra‐high molecular weight polyethylene (UHMWPE) is the primary obstacle to its melt processing. Particularly in melt spinning processes, the extremely high molecular weight of UHMWPE and the density of entangled molecular chains severely limit its production efficiency and monofilament performance. This study investigates the effect of flow modifiers on the melt spinning process of UHMWPE/HDPE blends, focusing on CaSt2, PEG, and CaSt2/silicone powder composite additives, and their impact on the standard tensile samples and monofilament tensile properties of UHMWPE/HDPE. The mechanism of additive influence on the tensile properties of UHMWPE/HDPE blends is analyzed through tensile strength testing, thermal analysis, and microscopic morphology observation. The results show that in standard tensile samples, CaSt2 or CaSt2/silicone powder composite additives can enhance the crystallinity of the blend, thereby improving its tensile strength. Conversely, adding PEG significantly reduces the crystallinity and tensile strength of the blend. The maximum tensile strength of CaSt2‐modified UHMWPE/HDPE monofilament is 1236.61 MPa. This enhancement is attributed to the lubricating effect of CaSt2, which simultaneously assists the molecular chains in the amorphous region, and the reorientation of the stress‐induced molten lamellar structure under tension, greatly promoting the formation of straight‐chain crystals in the monofilament. During hot drawing, PEG inhibits the formation of straight‐chain crystals in the monofilament, resulting in a 3.06% decrease in maximum crystallinity compared with standard tensile samples. When CaSt2 is combined with silicone powder, the additives tend to aggregate during hot drawing, and these larger aggregate particles hinder the orientation of molecular chains along the drawing direction, resulting in a 30.75% decrease in maximum tensile strength of the monofilament compared with the standard tensile samples.Highlights The tensile property of UHMWPE/HDPE blends modified with additives was discussed. Analytical techniques including DSC, SEM, and tensile strength tests were used. The maximum tensile strength of the monofilament can reach up to 1236.61 MPa. UHMWPE/HDPE/CaSt2 = 60/40/0.5 exhibits the best tensile property.

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Section: Dsc Analysismentioning

confidence: 99%

Enhanced melt flow UHMWPE/HDPE blends melt spinning and performance study

Wang,

Liu,

Qin

et al. 2024

Polymer Engineering & Sci

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“…The standard design of (HDPE) pipes is 25 o C (11), where these pipes are affected by the high temperature due to the transformation of the series of buildings from the linear to the cross(2), It is possible to observe this at a temperature of (200 o -220 o ) degrees Celsius, that changes the shape of that parts (12).…”

Section: A Hdpe Temperature Effectingmentioning

confidence: 99%

“…Laser Cutting of High Density Poly Ethylene (Hdpe) Pipes Pe100 using Co 2 Gas Laser Saleh Jassim Saleh.Al-Qaisy, Cihan KARATAŞ  HDPE Density: The Polyethylene density (0.910-0.965 g/cm³). The density of high density polyethylene (HDPE) depends on the polymerization of the molecular weight and the degree of crystalline (13), which means, increasing molecular weight, and greater carbon branches chain length, will make the crystallinity decreases and the final density will decrease(3), (11), because of (HDPE) is a kindly crystalline polymer.  HDPE Molecular weight distribution: Molecular weight or molecular mass will be found in polymers(2), during the polymerization.…”

Section: B Hdpe Mechanical Propertiesmentioning

confidence: 99%

Laser Cutting of High Density Poly Ethylene (Hdpe) Pipes Pe100 using Co2 Gas Laser

Saleh,

Qaisy,

Karatas

2019

IJEAT

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High Density Poly Ethylene (HDPE) is one of the best materials for use in different environmental conditions. This is due to the mechanical, chemical and electrical specifications of this type, in terms of thermal insulation, lightweight, low cost, and most importantly the time factor. The molecular structure of the High Density Poly Ethylene material has made it the ideal choice for use in the pipe industry, and the transportation of various liquids, compared with the metal pipes and especially in the transportation of water, oil, and gas. And because of the frequent use, especially in the workplace. The need to use the cutting for these pipes has become necessary for the purpose of establishing networks for the transfer of fluids. In this research, the construction of holes in the pipes and measurements and angles of different for the purpose of taking advantage of these openings in the construction of networks. The laser was used as one of the modern cutting methods for the purpose of studying the efficiency and performance of CO2 laser cutting on High Density Poly Ethylene, especially on pipes, PN 16 PE 100, 110 mm diameter, and tested under a CO2 laser machine, by using a three different kinds of gases, such as the air and the nitrogen N2 , to estimate the changing and evaluate the quality of cutting with striation and kerf width of the High Density Poly Ethylene.

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Structure and Mechanical Properties of Ultrahigh Molecular Weight Polyethylene Deformed Near Melting Temperature

Cited by 2 publications

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Enhanced melt flow UHMWPE/HDPE blends melt spinning and performance study

Enhanced melt flow UHMWPE/HDPE blends melt spinning and performance study

Laser Cutting of High Density Poly Ethylene (Hdpe) Pipes Pe100 using Co2 Gas Laser

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