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Moisture absorption behaviour and its impact on the mechanical properties of polyvinyl acetate (PVAc) based cellulose nanocomposites
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-8909-3554
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-3449-8233
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.ORCID iD: 0000-0002-7076-9494
Luleå University of Technology.
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2011 (English)In: Polymer Engineering and Science, ISSN 0032-3888, E-ISSN 1548-2634, Vol. 51, no 11, p. 2136-2142Article in journal (Refereed) Published
Abstract [en]

Cellulose nanowhisker (CNW) reinforced polyvinyl acetate (PVAc) nanocomposites were prepared by melt-extrusion using a master batch process. Microscopy images showed no visible aggregation of whiskers in the matrix. The influence of CNWs and moisture absorption on the mechanical behavior of the nanocomposites was studied. The water sorption studies indicated low water uptake (<10 wt%) for all the materials. However, higher moisture uptake was obtained in the nanocomposites compared to the matrix though the diffusion co-efficient of the nanocomposites was lower. The tensile strength and modulus were decreased with the addition of CNWs to PVAc, but the reduction is lower at higher CNW concentration indicating that the plasticizing effect of the moisture was counteracted to some extent by the reinforcing effect of CNWs. Higher tensile ductility and toughness, which were dependent on moisture absorption, were achieved in the nanocomposites than pure PVAc.

Place, publisher, year, edition, pages
2011. Vol. 51, no 11, p. 2136-2142
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-8574DOI: 10.1002/pen.22063ISI: 000296254700004Scopus ID: 2-s2.0-80054745063Local ID: 716ff7b8-11b7-4610-a229-78582a435bdfOAI: oai:DiVA.org:ltu-8574DiVA, id: diva2:981512
Note

Validerad; 2011; 20110525 (krioks)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2023-09-05Bibliographically approved

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Mathew, Aji P.Gong, GuanBjörngrim, NiclasWixe, DavidOksman, Kristiina

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