High-density polyethylene thermal properties

The most common backbone structure found in commercial polymers is the saturated carbon-carbon structure. Polymers with saturated carbon-carbon backbones, such as polyethylene, polypropylene, polystyrene, polyvinyl chloride, and polyacrylates, are produced using chain-growth polymerizations. The saturated carbon-carbon backbone of polyethylene with no side groups is a relatively flexible polymer chain. The glass transition temperature is low at -20°C for high-density polyethylene. Side groups on the carbon-carbon backbone influence thermal transitions, solubility, and other polymer properties. 

Cai, Y Wei, Q. Huang, R Lin, S. Chen, F. Gao, W. Thermal stability, latent heat and flame retardant properties of the thermal energy storage phase change materials based on paraffin/high density polyethylene composites. Renew Energ 34 (2009) 2117-2123. 

N.K. Madi, Thermal and mechanical properties of injection molded recycled high density polyethylene blends with virgin isotactic polypropylene. Mater. Des. 46, 435-441 (2013)... 

M. Kahar, A. Wahab, H. Ismail, N. Othman, Compatibilization effects of PE-g-MA on mechartical, thermal and swelling properties of high density polyethylene/natural rubbei/thcamoplastic tapioca starch blends. Polymer-Plastics Technology and Engineering 51, 298-303 (2012)... 

G. Madhu, H. Bhunia, P.K. Bajpai, Blends of high density polyethylene and poly(L-lactic acid) mechanical and thermal properties. Polym. Eng. Sci. (2013). doi 10.1002/pen.23764... 

M. Polliinen, M. Suvanto, T. Pakkanen, Cellulose reinforced high density polyethylene composites—Morphology, mechanical and thermal expansion properties. Compos. Sci. Technol. 76, 21-28 (2013)... 

Rusu, R., Sofian, N., and Rusu, D. Mechanical and thermal properties of zinc powder filled high density polyethylene composites. Polymer Testing, 20, 409-417... 

Mukhopadhyay S, Srikanta R (2008) Thermal properties of high density polyethylene Composites with natural fibres coupling agent effect. Polym Degrad Stab 93 2048-2051... 

Wirawan zt al. [50] and Sutrisno et al. [51] reported the thermal properties of water hyacinth-filled high-density polyethylene (HDPE). The flow chart of the experiment is shown in Figure 3.4. 

H. Osman, and M.H. Zakaria, Effects of durian seed flour on processing torque, tensile, thermal and biodegradation properties of polypropylene and high density polyethylene composites. Polym. Plast. Technol. Eng. 51(3), 243-250 (2012). 

B. Tajeddin and L. C. Abdulah. Thermal properties of high density polyethylene-kenaf cellulose composites. Po/ym. Polym. Compos. 18(5), 195-199 (2010). 

H. Ismail, A.H. Abdullah, and A.A. Bakar, Influence of acetylation on the tensile properties, water absorption, and thermal stabflity of (High-density polyethylene)/(soya powder)/ (kenaf core) composites. J. Vinyl Addit. Technol. 17,132-137 (2011). 

Test Properties, Testing Frequency and Recommended Warrant for High Density Polyethylene (HDPE) Smooth and Textured Geomembranes Seam Strength and Related Properties of Thermally Bonded Polyolefin Geomembranes Certification Guidelines for Plastic Geomembranes Used to Line Landfills and Contaminated Sites... 

A laser flash technique has been used to determine the diffusivity of pyroelectric polymers such as polyvinylidene fluoride [83], whereas hot-wire techniques have been used to determine the thermal diffusivity of high-density polyethylene, low-density polyethylene propylene, and polystyrene [83], Dos Santos and coworkers [84] utilized the laser flash technique to study the effect of recycling on the thermal properties of selected polymers. Thermal diffusivity expresses how fast heat propagates across a bulk material, and thermal conductivity determines the woiking temperature levels of a material. Hence, it is possible to assert that those properties are important if a polymer is used as an insulator, and also if it is used in applications in which heat transfer is desirable. Five sets of virgin and recycled commercial polymers widely used in many applications (including food wrapping) were selected for this study. 

Dao-Long et al. [9] reported that the mechanical properties of these composites are improved significantly over these of nnreinforced high-density polyethylene. Also, increasing the alumina content improves the thermal conductivity of the polymer. 

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