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| Rančić, M. |
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| Azevedo, Nuno Monteiro |
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Ferroni, F.
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document
PVC-wood composite
Abstract
The objective in this study was to research the use andimpact of newly developed nano-size additives on PVC-woodcomposites. The main focus was on environmentaldurability, mechanical properties were measured to ensurethe quality of the samples. Properties like UV-resistanceand resistance moisture are in many applications moreimportant than maximized mechanical strength. The testednano-additives in this study were ZnO and Mg(OH)2. ZnOwas added to improve UV-resistance, purpose of Mg(OH)2was to reduce smoke production in case of fire. Most ofthe work was concentrated on the use of nano-ZnO andother organic additives to improve durability in outdooruse. Nano-ZnO was incorporated as water dispersion,EVA-based masterbatch or external lubricant basedmasterbatch. Water dispersion was used because dispersednanosize ZnO was easy to mix with wood and produced gooddispersion in final compound. Different ways andequipment to process PVC-wood mixtures into extruded orextruded and moulded specimens were tested. Mainchallenge in processing was to simulate industrialprocessing by using only around 500 g material batches.The processing conditions had strong influence on thesurface quality of the sample which had remarkable effecton environmental durability. As a result we finally hadsimultaneous compounding and profile extrusion process,which produced constant high-quality samples from lessthan 500 g raw material batches. From the results oftests we saw the effect of nanoparticles, lubricants andadditives on behaviour of PVC-wood composites.