Mir, Samane (2014) Lightweight particleboard using expanded polystyrene (EPS). Masters thesis, University of Zabol.
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Abstract
This study investigates the manufacture of lightweight particleboard using virgin expanded polystyrene (EPS) as a partial substitute of wood particles. The general objective of this study was reducing 30 percent of the panel weight while the most important properties have been kept. The three parameters including polystyrene content, press temperature and type of adhesive (urea, phenol and melamine formaldehyde) were organized to make experimental panels. The analyses of collected data from physical and mechanical tests (flexural strength, modulus of elasticity, internal bonding, thickness swelling and water absorption) which made based on EN standard, has been ended to the results that follow: it was proved that EPS was a compatible polymer with the most common adhesive in particleboard industry and the interfacial bonding between wood particles and expanded polymer was formed as well. Removing a partial of wood particles from middle layer and the replacement of EPS to make available reducing weight with keeping physical characteristics was successful. The results clearly showed that with increasing press temperature and EPS content flexural strength and modulus of elasticity were improved. Comparatively, Urea formaldehyde resin has a better result on these properties to the other resin. Increasing press temperature and EPS content had a negative effect on internal bonding (IB). Besides, there was a correlation between adhesive type and IB as urea formaldehyde showed a best result on this strength. The results from physical tests showed that increasing EPS content can influenced and improved water absorption in 24 hours. The maximum level of water absorption and thickness swelling was on the panels made by urea formaldehyde, higher EPS content in minimum temperature. No significant differences were found in the effect of press temperature on screw withdrawal strength, while the highest of this strength was found on the panels made with 1 percent EPS content.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Lightweight Particleboard, Expanded Polystyrene, Resin type, Pressing Temperature, Panel properties |
| Subjects: | T Technology > TS Manufactures |
| Depositing User: | admin admin1 admin2 |
| Date Deposited: | 29 May 2016 09:02 |
| Last Modified: | 29 May 2016 09:02 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/694 |
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