The Influence of Initial Morphology on the Physical and Mechanical Properties of Extruded High Density Polyethylene Fibers

1979 ◽  
Vol 7 (1-2) ◽  
pp. 29-56 ◽  
Author(s):  
W. T. Mead ◽  
Roger S. Porter
Keyword(s):  
Mechanical Properties ◽  
High Density Polyethylene ◽  
Physical And Mechanical Properties ◽  
High Density ◽  
Polyethylene Fibers

scholarly journals Environmentally-Friendly High-Density Polyethylene-Bonded Plywood Panels

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1166 ◽  
Author(s):  
Pavlo Bekhta ◽  
Ján Sedliačik
Keyword(s):  
Mechanical Properties ◽  
Hot Pressing ◽  
High Density Polyethylene ◽  
Phenol Formaldehyde ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Core Layer ◽  
High Density ◽  
Pressing Pressure ◽  
Pressing Time

Thermoplastic films exhibit good potential to be used as adhesives for the production of veneer-based composites. This work presents the first effort to develop and evaluate composites based on alder veneers and high-density polyethylene (HDPE) film. The effects of hot-pressing temperature (140, 160, and 180 °C), hot-pressing pressure (0.8, 1.2, and 1.6 MPa), hot-pressing time (1, 2, 3, and 5 min), and type of adhesives on the physical and mechanical properties of alder plywood panels were investigated. The effects of these variables on the core-layer temperature during the hot pressing of multiplywood panels using various adhesives were also studied. Three types of adhesives were used: urea–formaldehyde (UF), phenol–formaldehyde (PF), and HDPE film. UF and PF adhesives were used for the comparison. The findings of this work indicate that formaldehyde-free HDPE film adhesive gave values of mechanical properties of alder plywood panels that are comparable to those obtained with traditional UF and PF adhesives, even though the adhesive dosage and pressing pressure were lower than when UF and PF adhesives were used. The obtained bonding strength values of HDPE-bonded alder plywood panels ranged from 0.74 to 2.38 MPa and met the European Standard EN 314-2 for Class 1 plywood. The optimum conditions for the bonding of HDPE plywood were 160 °C, 0.8 MPa, and 3 min.

Fabrication of Porous Polyethylene by Two-Stepped Heat Treatment and Powder Printing Technique

2010 ◽  
Vol 93-94 ◽  
pp. 165-168 ◽  
Author(s):  
Jintamai Suwanprateeb ◽  
Kitiya Wasoontararat ◽  
Waraporn Suvannapruk
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
High Density Polyethylene ◽  
Physical And Mechanical Properties ◽  
High Density ◽  
Processing Conditions ◽  
Structure And Properties ◽  
Porous Polyethylene ◽  
Printing Technique ◽  
The Relationship

In this study, a combination of powder printing technique and two-stepped heat treatment was utilized as a mean to prepare porous high density polyethylene structure. Physical and mechanical properties of the resulting structure were then characterized by porosity measurement and monotonic tensile test. It was found that the relationship between structure and properties was strongly influenced by processing conditions including compositions, treatment times and treatment temperatures. This process could increase the properties of porous high density polyethylene significantly over the single-stepped heat treatment without destroying porous structure. Porous high density polyethylene bodies having a porosity ranging from 46-58 percents with tensile strength up to approximately 4 MPa could be successfully prepared in this study.

Effect of hybridization on the physical and mechanical properties of high density polyethylene–(pine/agave) composites

2014 ◽  
Vol 64 ◽  
pp. 35-43 ◽  
Author(s):  
A.A. Pérez-Fonseca ◽  
J.R. Robledo-Ortíz ◽  
D.E. Ramirez-Arreola ◽  
P. Ortega-Gudiño ◽  
D. Rodrigue ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Density Polyethylene ◽  
Physical And Mechanical Properties ◽  
High Density

Visualization of continuous crystal formation in high-density polyethylene

1987 ◽  
Vol 45 ◽  
pp. 448-449
Author(s):  
J. M. Brady ◽  
E. L. Thomas
Keyword(s):  
Thin Films ◽  
Mechanical Properties ◽  
Molecular Weight ◽  
High Density Polyethylene ◽  
Physical And Mechanical Properties ◽  
High Density ◽  
Crystal Formation ◽  
Ultimate Properties ◽  
Evolution Of Structure ◽  
Modulus Polyethylene

Though chemically simple, polyethylene has proven to be an extremely versatile polymer. Its physical and mechanical properties can be made to cover a broad range of requirements by varying processing, branching, and the molecular weight of the material. In particular, ultrahigh modulus polyethylene (tensile moduli exceeding 200 Gpa) has been made by solid state extrusion (SSE) at 110 C followed by post drawing (PD) at 125 C. The objective of the following study was to investigate the evolution of structure during the SSE/PD process, and to identify those morphological features which give rise to ultimate properties.The SSE/PD process was mimicked here by deforming thin films of HDPE at high temperature (129 C). High density polyethylene (HDPE) of Mw = 200,000 and Mw /Mn =7-13 was used. As-processed films were highly oriented and displayed a single crystal-like textured shish-kebab morphology.

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