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Silane-crosslinking of recycled low-density polyethylene/wood composites
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.ORCID iD: 0000-0001-9794-8305
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-4762-2854
2010 (English)In: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840, Vol. 41, no 5, p. 678-683Article in journal (Refereed) Published
Abstract [en]

The aim of this work was to study silane-crosslinking of recycled low-density polyethylene wood composites and its effect on composites properties. The composites were produced in a one-step twin-screw extrusion process and the silane-peroxide solution was pumped into the extruder. Degree of crosslinking, mechanical properties, short-term creep, fractured surfaces and nature of crosslinking were studied to understand the relationship between composite structure and properties. The results showed that crosslinked composite strength, toughness and creep resistance were improved compared to uncrosslinked composites. The flexural strength was doubled compared to uncrosslinked samples and the creep strain was reduced. The crosslinked composites stored under room conditions showed the highest strength, whereas storage in a sauna resulted in a higher degree of crosslinking. The Fourier transform infrared spectroscopy indicated formation of silane-bridges between wood and polyethylene, accordingly improving the interfacial adhesion between the wood and LDPE. The low concentration of peroxide in the silane-solution was shown to be a preferred composition to limit unintentional crosslinking during the process.

Place, publisher, year, edition, pages
2010. Vol. 41, no 5, p. 678-683
National Category
Bio Materials Physical Chemistry
Research subject
Wood and Bionanocomposites; Physical Chemistry
Identifiers
URN: urn:nbn:se:ltu:diva-8951DOI: 10.1016/j.compositesa.2010.01.018ISI: 000276430300013Scopus ID: 2-s2.0-77649336169Local ID: 7822a520-1716-11df-bae5-000ea68e967bOAI: oai:DiVA.org:ltu-8951DiVA, id: diva2:981889
Note
Validerad; 2010; 20100211 (krioks)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Grubbström, GöranHolmgren, AllanOksman, Kristiina

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