scholarly journals The effects of particle size and content on the thermal conductivity and mechanical properties of Al2O3/high density polyethylene (HDPE) composites

2011 ◽  
Vol 5 (7) ◽  
pp. 581-590 ◽  
Author(s):  
S. Zhang ◽  
X. Y. Cao ◽  
Y. M. Ma ◽  
Y. C. Ke ◽  
J. K. Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Particle Size ◽  
High Density Polyethylene ◽  
High Density

Mechanical Properties and Thermal Conductivity of Coal Ash-Recycled High-Density Polyethylene Composite

2018 ◽  
Vol 06 (01n02) ◽  
pp. 1850002
Author(s):  
Ban M. Alshabander ◽  
Awattif A. Mohammed ◽  
Asmaa Sh. Khalil
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
High Density Polyethylene ◽  
Waste Product ◽  
Construction Materials ◽  
Coal Ash ◽  
High Density ◽  
Plastic Composite ◽  
The Impact ◽  
Recycled Hdpe

In this study, coal ash/recycled plastic composite material was fabricated with post-consumer high-density polyethylene (HDPE) and coal ash particles. The main idea of using coal ash, since it is also a waste product, as reinforcing filler in recycled HDPE is to reduce the cost, develop lightweight and produce environmental-friendly materials. Coal ash/recycled plastic composite have been used in significant applications as construction materials including flooring, landscaping, fencing, railing window framing and roof tiles. Effect of coal ash loading on the mechanical properties and thermal conductivity of coal ash/recycled HDPE composite were determined. It is expected to use waste materials in new field by getting novel composite materials with developed mechanical properties. It was found that coal ash filler indicated significant improvement on the mechanical properties of composites. The results show that the impact decreased tremendously from 57.32 to 15.8[Formula: see text]kJ/m2 with only 30[Formula: see text]wt.% loading of coal ash. The filler increases the elasticity of the material and reduces its ability to absorb deformation energy.

Thermo-mechanical properties of graphite-reinforced high-density polyethylene composites and its structure–property corelationship

2016 ◽  
Vol 51 (12) ◽  
pp. 1769-1782 ◽  
Author(s):  
Alok Kumar Pandey ◽  
Kavita Singh ◽  
Kamal K Kar
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
High Density Polyethylene ◽  
Flexural Modulus ◽  
High Density ◽  
Graphite Flake ◽  
Melt Mixing ◽  
Degradation Temperature ◽  
Polyethylene Composites

Composite prepared by mixing of different forms of carbon or other reinforcing fillers with polymer, is one of the possible ways to enhance the performance of polymeric materials. The present work focuses on the study of viscoelastic, thermal, electrical and mechanical properties of graphite flake-reinforced high-density polyethylene composites. The composites are processed by melt mixing using vertical twin-screw micro-compounder followed by final sample preparation via micro injection moulding. The reinforcing filler, graphite flake, is varied from 0 to 50 vol.% with respect to the polymer matrix. Dynamic mechanical thermal analysis reveals an increase in the storage modulus (E′) as well as loss modulus (E″) throughout the temperature range; however, damping (tan δ) shows a mixed behaviour. There is 550% and 479% increase of E′ and E″ in the rubbery region. Degree of entanglement, reinforcement efficiency and C factor are also calculated and correlated with the mechanical properties. On comparison, high-density polyethylene /graphite flake composite having 50 vol.% graphite flake with pure high-bcdensity polyethylene shows 52% increase in melt viscosity, whereas bulk density increases by 38%. This graphite flake is also responsible for the increase in the thermal stability (shift in the onset degradation temperature of ∼7℃ and the degradation temperature is more than 400℃), thermal conductivity (175% improvement) and electrical conductivity (∼6125% improvement, as the conductivity of pristine high-density polyethylene is ∼9.67 E-08 S/m). Mechanical properties determined by tensile and flexural tests show an initial increase and then a slight decrease in the tensile and flexural strength. Therefore, the graphite flake-reinforced high-density polyethylene composite with improved thermal conductivity, electrical conductivity, heat stability, viscoelastic behaviour and flexural modulus can be a promising as well as suitable composite material for making of various electronic and electrical accessories including bipolar plate for fuel cell applications.

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