Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 61, Issue -, Pages 13-22Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2014.02.002
Keywords
Wood; Fibres; Thermoplastic resin; Mechanical properties
Funding
- European Community's Seventh Framework Programme [214714]
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This study presents a comparison of the effect of various wood fibre types in polylactic acid and polypropylene composites produced by melt processing. The study also reveals the reinforcing effect of pelletised wood fibres compared to conventionally used wood flour or refined fibres. Composites containing 30 wt.% of chemical pulps, thermomechanical pulp and wood flour were produced by compounding and injection moulding. Fibre morphologies were analysed before and after melt processing. The dispersion of the fibres and mechanical performance of the composites were also investigated. Fibre length was reduced during melt processing steps, reduction being higher with longer fibres. Wood fibres provided clearly higher plastic reinforcement than wood flour. Comparing the wood fibre types, TMP fibres provided the highest improvement in mechanical properties in polylactic acid composites with uniform fibre dispersion. In polypropylene composites, fibre selection is not as crucial. (C) 2014 Elsevier Ltd. All rights reserved.
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