Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 53, Issue -, Pages 46-53Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2013.06.003
Keywords
Polymer-matrix composites (PMCs); Mechanical properties; Fiber/matrix bond; Micro-mechanics
Funding
- National Scientific Research Fund of Hungary (OTKA) [K 101124]
- EU [212239]
- Hungarian Academy of Sciences
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A resol type phenolic resin was prepared for the impregnation of wood particles used for the reinforcement of PLA. A preliminary study showed that the resin penetrates wood with rates depending on the concentration of the solution and on temperature. Treatment with a solution of 1 wt% resin resulted in a considerable increase of composite strength and decrease of water absorption. Composite strength improved as a result of increased inherent strength of the wood, but interfacial adhesion might be modified as well. When wood was treated with resin solutions of larger concentrations, the strength of the composites decreased, first slightly, then drastically to a very small value. A larger amount of resin results in a thick coating on wood with inferior mechanical properties. At large resin contents the mechanism of deformation changes; the thick coating breaks very easily leading to the catastrophic failure of the composites at very small loads. (C) 2013 Elsevier Ltd. All rights reserved.
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