Effect of blending small amount of high-density polyethylene on molecular entanglements during melt-drawing of ultrahigh-molecular-weight polyethylene

Polymer ◽  
2022 ◽  
pp. 124528
Author(s):  
Ayaka Takazawa ◽  
Masaki Kakiage ◽  
Takeshi Yamanobe ◽  
Hiroki Uehara ◽  
Yui Shimizu ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Density Polyethylene ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
High Density ◽  
Ultrahigh Molecular Weight

The influence of formation temperatures on the crystal structure and mechanical properties of ultrahigh-molecular-weight polyethylene/high-density polyethylene-blend fibers prepared by melt spinning

2019 ◽  
Vol 49 (8) ◽  
pp. 1011-1035 ◽  
Author(s):  
Fei Wang ◽  
Lichao Liu ◽  
Ping Xue ◽  
Mingyin Jia ◽  
Suwei Wang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Density Polyethylene ◽  
Melt Spinning ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
High Density ◽  
Chain Orientation ◽  
Drawing Temperature ◽  
Polyethylene Blend ◽  
Ultrahigh Molecular Weight ◽  
Molecular Chain Orientation

The influence of spinning temperature on ultrahigh-molecular-weight polyethylene/high-density polyethylene as-spun blend filaments and the influence of drawing temperature on ultrahigh-molecular-weight polyethylene/high-density polyethylene-blend fibers were investigated. The results showed that the optimum spinning and hot-drawing temperatures were 310℃ and 85℃, respectively, and blending with high-density polyethylene improved the orienting ability of the molecular chains and the crystallization ability. The blend filaments spun at 310℃ had the best molecular chain orientation, crystallinity and crystal orientation of the filaments examined; both lower and higher spinning temperatures were detrimental to the crystal structure growth of the as-spun blend filaments. The optimum drawing temperature of the blend fibers was 85℃, which resulted in blend fibers with the best molecular chain orientation, crystallization, and crystal orientation as well as the thinnest grains of the fibers examined. The highest tensile strength and initial modulus were 1204 MPa and 20.4 GPa, respectively; these high values can be attributed to the fibrillar structure, which consisted of extended molecular chains and thin grains. The results in this paper can help disclose the effect mechanism of formation temperature on the melt spinning method used to produce high-strength ultrahigh-molecular-weight polyethylene fibers.

scholarly journals Thermal and mechanical properties of ultrahigh molecular weight polyethylene/high-density polyethylene/polyethylene glycol blends

2013 ◽  
Vol 33 (7) ◽  
pp. 599-614 ◽  
Author(s):  
Mazatusziha Ahmad ◽  
Mat Uzir Wahit ◽  
Mohammed Rafiq Abdul Kadir ◽  
Khairul Zaman Mohd Dahlan ◽  
Mohammad Jawaid
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Polyethylene Glycol ◽  
Impact Strength ◽  
High Density Polyethylene ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
High Density ◽  
Mechanical And Thermal Properties ◽  
Degradation Temperature ◽  
Ultrahigh Molecular Weight

Abstract Blends of ultrahigh molecular weight polyethylene (UHMWPE) with high-density polyethylene (HDPE) provide adequate mechanical properties for biomedical application. In this study, the mechanical and thermal properties of UHMWPE/HDPE blends with the addition of polyethylene glycol (PEG) prepared via single-screw extruder nanomixer were investigated. The UHMWPE/HDPE blends exhibit a gradual increase in strength, modulus, and impact strength over pure polymers, suggesting synergism in the polymer blends. The elastic and flexural modulus was increased at the expense of tensile, flexural, and impact strength for the blends containing PEG. The degradation temperature of UHMWPE was improved with the incorporation of HDPE due to good thermal stability of HDPE. HDPE improved the dispersibility of PEG in matrix, consequently reduced the surface area available for the kinetic effects, and reduced the degradation temperature. The morphology analysis confirmed the miscibility between UHMWPE and HDPE and the changes in polymer structure with the presence of PEG modify the thermal behavior of the blends. The mechanical properties of the blends that are underlying values for the design of implant material show the potential used as biomedical devices.

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