Naslov
Mechanical properties of elastomer modified wood plastic composites

Autori
Katančić, Zvonimir ; Ptiček Siročić, Anita ; Marić, Gojko ; Hrnjak Murgić, Zlata

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Zbornik radova Proceedings International Conference Matrib 2011 / Schauperl, Zdravko ; Šolić, Sanja - Zagreb : Hrvatsko društvo za materijale i tribologiju (HDMT), 2011, 187-193

ISBN
978-953-7040-20-8

Skup
International Conference MATRIB 2011, Materials, Tribology, Recycling

Mjesto i datum
Vela Luka, Hrvatska, 29.06.2011. - 01.07.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
mechanical properties; polyethylene; recycled rubber; wood plastic composite

Sažetak
Global ecological concern has resulted in an interest in renewable natural materials. Much work has been done in studying and developing general thermoplastic/natural fibers composites, especially wood plastic composites(WPCs). WPCs have successfully proven their application in various fields such as lumber, decking and railing, window profiles, wall studs, door frames, furniture, pallets, fencing, docks, siding, architectural profiles, boat hulls, and automotive components. Wood plastic composites (WPCs) are roughly 50:50 mixtures of thermoplastic polymers and small wood particles. The wood and thermoplastics are usually compounded above the melting temperature of the thermoplastic polymers and then further processed to make various WPC products. Compared with unfilled thermoplastics, the advantages of WPCs include increased bending strength, stiffness (both flexural and tensile modulus), reduced thermal expansion, and lowered cost. However, mechanical properties such as creep resistance, modulus, and strength are usually lower than those of solid wood. Thus, WPCs are not currently being used in applications that require considerable structural performance, and research is needed towards engineering WPCs. Wood–plastic composites (WPCs) undergo cyclic dimensional changes due to periodic absorption and desorption of moisture, and the resulting loss of mechanical integrity can be ameliorated using a coupling agent. Elastomers have also been used to modify the performance of filled polyolefins such as wood–plastic composites (WPCs). The chemical architecture of the elastomer influences how it functions in the composite. For example, it can toughen the matrix, usually by generating localized yielding rather than catastrophic failure. The objective of this study was to investigate the effect of the material composition on the mechanical and thermal properties of high density polyethylene/wood composites. For this purpose WPCs were prepared with and without recycled rubber. The first series contained HDPE and wood flour in ratios 70:30, 60:40 and 50:50 while the second series contained 5 % of finely minced recycled rubber. Mechanical properties (impact strength and elongation at break) were determined for all prepared samples. Thermogravimetric analysis was used for determination of thermal stability of composites. Results show differences in mechanical properties and thermal stability due to sample composition. It can be generally concluded that the material composition of WPCs is a crucial factor for achievement of their good properties.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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