An environmentally friendly process for the preparation of high performance ultra-high molecular weight polyethylene thin films

2002 ◽  
Author(s):  
Kwan Yee Lau
Keyword(s):  
Thin Films ◽  
Molecular Weight ◽  
High Molecular Weight ◽  
High Performance ◽  
Environmentally Friendly ◽  
Environmentally Friendly Process ◽  
Ultra High Molecular Weight

scholarly journals An Environmentally Friendly Process for the Preparation of UHMWPE As-Spun Fibres

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Abdul Waqar Rajput ◽  
Anwar ul Aleem ◽  
Farooq Ahmed Arain
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Environmentally Friendly ◽  
Melt Viscosity ◽  
Process Cost ◽  
Natural Solution ◽  
Environmentally Friendly Process ◽  
Ultra High Molecular Weight ◽  
Very High

The extrusion of ultra high molecular weight polyethylene (UHMWPE) fibres cannot be achieved by conventional extrusion processes due to its very high melt viscosity. To overcome this limitation, UHMWPE is first dissolved in a petrochemical to form a gel before extrusion. The petrochemicals used to dissolve the polymer then need to be removed using other chemicals making the process unfriendly to the environment. This article is focused on finding an environmentally friendly, natural solution to replace these chemicals and altering the process to potentially reduce the process cost.

scholarly journals Improving Interlayer Adhesion of Poly(p-phenylene terephthalamide) (PPTA)/Ultra-high-molecular-weight Polyethylene (UHMWPE) Laminates Prepared by Plasma Treatment and Hot Pressing Technique

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2600
Author(s):  
Long Zhu ◽  
Dmitriy A. Dikin ◽  
Simona Percec ◽  
Fei Ren
Keyword(s):  
Molecular Weight ◽  
Plasma Treatment ◽  
High Molecular Weight ◽  
Hot Pressing ◽  
Composite Structures ◽  
High Performance ◽  
Surface Roughening ◽  
Moderate Increase ◽  
High Performance Polymer ◽  
Ultra High Molecular Weight

Poly(p-phenylene terephthalamide) (PPTA) is a high-performance polymer that has been utilized in a range of applications. Although PPTA fibers are widely used in various composite materials, laminar structures consisting of PPTA and ultra-high-molecular-weight polyethylene (UHMWPE), are less reported. The difficulty in making such composite structures is in part due to the weakness of the interface formed between these two polymers. In this study, a layered structure was produced from PPTA fabrics and UHMWPE films via hot pressing. To improve the interlayer adhesion, oxygen plasma was used to treat the PPTA and the UHMWPE surfaces prior to lamination. It has been found that while plasma treatment on the UHMWPE surface brought about a moderate increase in interlayer adhesion (up to 14%), significant enhancement was achieved on the samples fabricated with plasma treated PPTA (up to 91%). It has been assumed that both surface roughening and the introduction of functional groups contributed to this improvement.

Twist-film gel spinning of large-diameter high-performance ultra-high molecular weight polyethylene monofilaments

2016 ◽  
Vol 87 (19) ◽  
pp. 2323-2336 ◽  
Author(s):  
Xudong Fang ◽  
Jing Shi ◽  
Tom Wyatt ◽  
Donggang Yao
Keyword(s):  
Molecular Weight ◽  
Solvent Extraction ◽  
High Molecular Weight ◽  
High Performance ◽  
Large Diameter ◽  
High Strength ◽  
Gel Spinning ◽  
Solvent Removal ◽  
Spinning Process ◽  
Ultra High Molecular Weight

A twist-film gel spinning process was developed for large-diameter high-performance ultra-high molecular weight polyethylene (UHMWPE) monofilaments. By using polybutene as a spin-solvent, film twisting was demonstrated to be an effective method for solvent removal; approximately 70% of solvent contained in the gel film can be removed simply by film twisting. This mechanical solvent removal process also makes conventional solvent extraction proceed significantly faster. Besides improved solvent extraction efficiency, large-diameter high-strength UHMWPE monofilaments (with diameters of about 80 µm and strength exceeding 3.2 GPa) can be produced with this process, which is difficult to achieve using conventional processes. The capability of making large-diameter high-strength monofilaments may allow new products of UHMWPE to be developed in a number of high-performance applications.

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