Enhancing toughness of low-density polyethylene filaments through infusion of multiwalled carbon nanotubes and ultrahigh molecular weight polyethylene

2010 ◽  
Vol 51 (4) ◽  
pp. 654-662 ◽  
Author(s):  
Mujibur R. Khan ◽  
Hassan Mahfuz ◽  
Theodora Leventouri ◽  
Vijaya K. Rangari ◽  
Andreas Kyriacou
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Weight ◽  
Multiwalled Carbon Nanotubes ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Multiwalled Carbon ◽  
Ultrahigh Molecular Weight

Effect of Functionalized MWCNTs with Surfactant and Coupling Agent on Properties of LDPE/POE Blends

2011 ◽  
Vol 43 (6) ◽  
pp. 543-558 ◽  
Author(s):  
Z. Chen ◽  
S. Chen ◽  
J. Zhang
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Tensile Strength ◽  
Multiwalled Carbon Nanotubes ◽  
Crystallization Behavior ◽  
Low Density Polyethylene ◽  
Favorable Effect ◽  
Low Density ◽  
Multiwalled Carbon ◽  
Polyolefin Elastomer

The surfactant, sodium dodecylbenzenesulfonate (NaDDBS) and coupling agents, γ-aminopropyltriethoxy sliane (KH550) and isopropyl dioleic(dioctylphosphate) titanate (NDZ101) were used to treat multiwalled carbon nanotubes in this work. The effects of surface modification of multiwalled carbon nanotubes on crystallization behavior, mechanical properties, and electrical properties of low density polyethylene/polyolefin elastomer/multiwalled carbon nanotubes composites were studied. The results showed that NaDDBS, KH550, and NDZ101 had a favorable effect of improving the dispersion of multiwalled carbon nanotubes, but it cannot improve the interfacial interactionbetween multiwalled carbon nanotubes and the matrix. The improvement in dispersion favored the crystallization behavior and mechanical properties. Modified multiwalled carbon nanotubes had a better acceleration nucleation effect than raw multiwalled carbon nanotubes on low density polyethylene/polyolefin elastomer blends at low content (≤1 wt%). The tensile strength of low density polyethylene/polyolefin elastomer/multiwalled carbon nanotubes composites with modified multiwalled carbon nanotubes increased with lower multiwalled carbon nanotubes content (≤1 wt%), and KH550 and NDZ101 led low density polyethylene/polyolefin elastomer/multiwalled carbon nanotubes composites to possess a higher tensile strength than that of NaDDBS with 1 wt% content. NaDDBS, KH550, and NDZ101 had a minor influence on the dielectric properties of the composites and even caused a decrease in the dielectric loss of composites with 10 wt% multiwalled carbon nanotubes content.

Insert injection molding of low-density polyethylene single-polymer composites reinforced with ultrahigh-molecular-weight polyethylene fabric

2017 ◽  
Vol 31 (8) ◽  
pp. 1013-1028 ◽  
Author(s):  
Jian Wang ◽  
Dongjie Chen ◽  
Sui Wang ◽  
Ziran Du ◽  
Nannan Jiang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Injection Molding ◽  
Polymer Composites ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Woven Fabric ◽  
Low Density Polyethylene ◽  
Processing Temperature ◽  
Low Density ◽  
Injection Speed ◽  
Ultrahigh Molecular Weight

Low-density polyethylene single-polymer composites (SPCs) reinforced with sandwiched ultrahigh-molecular-weight polyethylene woven fabric were prepared by insert injection molding. The process combines aesthetic and processing advantages. A processing temperature window (135–155°C) of a very short cycle time (less than 30 s) could be realized. The mechanical properties and morphologies of the samples were evaluated. The results suggested that the polyethylene SPCs were prepared successfully with concurrent increases in flexural strength (∼57%), tensile strength (∼164%), and impact strength (∼69%). The effects of different processing parameters including the nozzle temperature, injection pressure, injection speed, and the holding time were discussed. Numerical simulation results were used in the analysis.

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