scholarly journals Preparation of Low-Density Polyethylene Composite with Copper Nanoparticles

2021 ◽  
Vol 16 ◽  
pp. 150-157
Author(s):  
A. B. Kostrichenko ◽  
Kyaw Ye Ko
Keyword(s):  
Crystal Structure ◽  
Phase Transformations ◽  
Polymer Matrix ◽  
Copper Nanoparticles ◽  
Degree Of Crystallinity ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Cu Nanoparticles ◽  
Linear Low Density Polyethylene ◽  
Polyethylene Composite

In this work, devoted to the preparation and study of the properties of copper-containing nanocomposites based on linear low density polyethylene, it is shown that the composition of the resulting nanocomposite is not complicated by phase transformations during its synthesis. Varying the concentration of copper (II) formate (1.2÷50.8 wt%) makes it possible to control the size of the formed nanoparticles (10.2±2.0÷ 21.3±1,5 nm). It has been shown that the presence of Cu nanoparticles in a polymer matrix leads to a decrease in its degree of crystallinity - the value decreases from 42% for polyethylene to 37% for 3Cu / LLDPE, which is due to the restriction of the free movement of polymer chain segments by metal nanoparticles and, accordingly, the formation of a less ordered crystal structure.

scholarly journals Effect of Heat Drawing Process on Mechanical Properties of Dry-Jet Wet Spun Fiber of Linear Low Density Polyethylene/Carbon Nanotube Composites

2017 ◽  
Vol 2017 ◽  
pp. 1-9
Author(s):  
Jong Won Kim ◽  
Joon Seok Lee
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Tensile Strength ◽  
Polymer Materials ◽  
Degree Of Crystallinity ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Drawing Process ◽  
Linear Low Density Polyethylene ◽  
Crystallinity Degree

Polyethylene is one of the most commonly used polymer materials. Even though linear low density polyethylene (LLDPE) has better mechanical properties than other kinds of polyethylene, it is not used as a textile material because of its plastic behavior that is easy to break at the die during melt spinning. In this study, LLDPE fibers were successfully produced with a new approach using a dry-jet wet spinning and a heat drawing process. The fibers were filled with carbon nanotubes (CNTs) to improve the strength and reduce plastic deformation. The crystallinity, degree of orientation, mechanical properties (strength to yield, strength to break, elongation at break, and initial modulus), electrical conductivity, and thermal properties of LLDPE fibers were studied. The results show that the addition of CNTs improved the tensile strength and the degree of crystallinity. The heat drawing process resulted in a significant increase in the tensile strength and the orientation of the CNTs and polymer chains. In addition, this study demonstrates that the heat drawing process effectively decreases the plastic deformation of LLDPE.

Enhanced mechanical properties of a multiwall carbon nanotube attached pre-stitched graphene oxide filled linear low density polyethylene composite

2014 ◽  
Vol 2 (8) ◽  
pp. 2681-2689 ◽  
Author(s):  
Nam Hoon Kim ◽  
Tapas Kuila ◽  
Joong Hee Lee
Keyword(s):  
Graphene Oxide ◽  
Carbon Nanotube ◽  
Low Density Polyethylene ◽  
Multiwall Carbon Nanotube ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Polyethylene Composite ◽  
Multi Walled Carbon Nanotube ◽  
Multiwall Carbon ◽  
Reinforcing Filler

Multi-walled carbon nanotube attached pre-stitched graphene oxide used as a reinforcing filler in linear low density polyethylene (LLDPE) composite. The tensile strength of the composite with 1 wt. % filler was enhanced dramatically by 148.7% compared to that of the neat LLDPE.

Hemp Fibers Waste and Linear Low Density Polyethylene Composite Properties

2016 ◽  
Vol 721 ◽  
pp. 33-37
Author(s):  
Zane Zelca ◽  
Silvija Kukle ◽  
Janis Kajaks ◽  
Marija Geikina-Geimana
Keyword(s):  
Water Resistance ◽  
Melt Flow Index ◽  
Lubricant Additive ◽  
Low Density Polyethylene ◽  
Flow Index ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Melt Flow ◽  
Hemp Fibers ◽  
Polyethylene Composite

Influence of the composite preparing technology and filler type (hemp waste and hemp fibres) on the performance characteristics (melt flow index and water resistance) of the composites based on a linear low density polyethylene (LLDPE) was investigated. The best melt flow index (MFI) results were achieved when as composites preparing method extrusion and two rolls mill with lubricant additive combination were used. It is established that usage of extrusion mixing method of the hemp fibers containing LLDPE composites significantly affects materials melts fluidity evaluated by values of MFI and quality of extruded profile. The lowest fluidity was observed for composite with hemp waste prepared by two rolls mill processing method. The best water resistance was observed for composites with lubricant and for their preparing two rolls mill and extrusion processing methods combination was used.

Analysis and testing of polymer matrix composites with thermoplastic liners having enhanced chemical resistance

2017 ◽  
Vol 36 (20) ◽  
pp. 1487-1502
Author(s):  
Luke P Djukic ◽  
Manudha T Herath ◽  
Daniel C Rodgers ◽  
Roderick Sweeting ◽  
Honesto Buendia
Keyword(s):  
Polymer Matrix ◽  
Chemical Resistance ◽  
Polymer Matrix Composites ◽  
Polyethylene Liner ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Matrix Composites ◽  
Linear Low Density Polyethylene ◽  
Dangerous Goods ◽  
Steel Tanks

Polymer matrix composite tanks offer major advantages to the transport industry in terms of increased payload and corrosion resistance compared to conventional steel tanks. Chemical resistance and versatility can be enhanced through the addition of a thermoplastic liner. This paper presents the results of chemical conditioning, testing and analysis of a linear low-density polyethylene liner, on its own and supported by carbon fiber reinforced polymer. Results are compared to ADR (European Agreement Concerning the International Carriage of Dangerous Goods by Road) requirements. The linear low-density polyethylene liner was tested in combination with 12–15% sodium hypochlorite and 98% sulphuric acid. The results indicate that the liner is suitable for service in tanks transporting these two chemicals. Liners were conditioned at 50℃ for periods of 1000 or 2000 h. Shore D hardness tests and three-point bend tests were performed, compared to unconditioned benchmarks, and found to pass ADR requirements. Finite element models were validated and used to facilitate understanding of the failure of the laminates. Predictions indicate that failure load increases with increased liner modulus, yield stress, and thickness. The models also indicate that the laminate strength and modulus is not significantly changed during chemical conditioning for the stated chemicals.

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