Effects of Moisture on Dynamic Mechanical Properties of Wood Fiber Composites Studied by Dynamic FT-IR Spectroscopy
2008 (English)In: Journal of reinforced plastics and composites (Print), ISSN 0731-6844, E-ISSN 1530-7964, Vol. 27, no 16-17, 1709-1721 p.Article in journal (Refereed) Published
Wood fiber reinforced polylactide is a biodegradable composite where both fibers and matrix are from renewable resources. In the development of such new materials, information on mechanical behavior on the macroscopic and the molecular level is useful. In this study, dynamic Fourier transform infrared (FT-IR) spectroscopy is used to measure losses at the molecular level during cyclic tensile loading for bonds that are characteristic of the cellulosic fibers and the polylactid matrix. This molecular behavior is compared with measured macroscopic hysteresis losses for different moisture levels. The results show that moisture ingress will transfer the load from the fibers to the matrix, and that a more efficient fiber-matrix interface would diminish mechanical losses. Although the dynamic FT-IR spectroscopy method is still qualitative, this investigation shows that it can provide information on the stress transfer of the constituents in wood fiber reinforced plastics.
Place, publisher, year, edition, pages
2008. Vol. 27, no 16-17, 1709-1721 p.
wood fiber, dynamic FT-IR, stress transfer, moisture, interface
Paper, Pulp and Fiber Technology Mechanical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-6992DOI: 10.1177/0731684407084663ISI: 000260411900005OAI: oai:DiVA.org:kth-6992DiVA: diva2:11862
QC20100714. Tidigare titel "Effects of moisture on dynamic mechanical properties of wood-fibre reinforced polylactide studied by dynamic FT-IR spectroscopy.