Document Type : Research Paper

Authors

• Morteza Mostafazadeh mrznaki ¹
• Saeid kazemi najafi ²
• Majid Chaharmahali ³
• Reza Hajihassani ⁴

¹ Wood and Paper Science and Technology, College of Natural Resources and Marine Sciences, Tarbiat Modares University

² Associated professor of Wood and Paper Sciences Groups, Tarbiat Modares University

³ MSc. College of Natural Resources and Marine Sciences, Tarbiat Modares University

⁴ Wood and forest products division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran

Abstract

In study, the influence of flour content and immersion time in water on the creep behavior of composites made from mixes PB (Particle Board) and MDF (Medium Density Fiber Board) flour and high density polyethylene (HDPE) waste and was investigated. Mixing was done by a twin screw extruder and the sample was manufactured by flat hot press. Firstly, the modulus of elasticity and bending strength of various mixes PB and MDF flour-polyethylene composites (WPC_S) were measured before performing the creep test.It was shown that the modulus of WPCs increases with the increase in mixes PB and MDF flour content from 60% to 70% and then decreases as the flour content reaches to 80%. It is found that the bending strengths of WPCs significantly and linearly decreases with the increase in flour content from 60% to 80%. The results showed that, the creep strain decreases as the lignocellulosic flour level increases. Water absorption has negative effect on creep behavior of mixes PB and MDF flour/HDPE composites. For all filler contents, it can be seen that the creep strain increases when the immersion time increases.
 

Keywords

• Waste HDPE
• water absorption
• Behavior Creep
• Wood plastic composites
• HOT PRESS

Main Subjects

• Composite wood products
• Physics and Mechanical Wood