Changes in colour and mechanical properties of wood polypropylene composites on natural weathering

Abstract: This comparative study focused on understanding the effect of coupling agent and particle size on weathering behaviour of wood polypropylene composite. Two coupling agents, namely maleic anhydride grafted polypropylene and m-TMI (m-Isopropenyl-α,α? dimethylbenzyl isocyana...

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Autores principales:	Gunjal,Jayashri, Aggarwal,Pankaj, Chauhan,Shakti
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2020
Materias:	Colour flexural strength mechanical properties tensile strength weathering WPC.
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2020000300325
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spelling	oai:scielo:S0718-221X20200003003252020-06-26Changes in colour and mechanical properties of wood polypropylene composites on natural weatheringGunjal,JayashriAggarwal,PankajChauhan,Shakti Colour flexural strength mechanical properties tensile strength weathering WPC. Abstract: This comparative study focused on understanding the effect of coupling agent and particle size on weathering behaviour of wood polypropylene composite. Two coupling agents, namely maleic anhydride grafted polypropylene and m-TMI (m-Isopropenyl-α,α? dimethylbenzyl isocyanate) grafted polypropylene were used in preparation of the composites. The composites were exposed to outdoor conditions for one year and changes in surface colour and mechanical properties were measured after 2, 4, 8 and 12 months of natural weathering. During the initial four months of weathering considerable colour change was observed with increase in lightness. Mechanical properties were unaffected largely for the initial four months and thereafter started declining. Overall, tensile strength decreased by about 15 % and flexural strength decreased by about 8 % after one year of weathering. The flexural modulus also decreased by about 10 %. Wood particle size was found to affect the aesthetic and strength of the composites after natural weathering. Coupling agents had a positive impact on mechanical properties however their influence on weathering degradation was not noticeable.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.22 n.3 20202020-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2020000300325en10.4067/S0718-221X2020005000307
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Colour flexural strength mechanical properties tensile strength weathering WPC.
spellingShingle	Colour flexural strength mechanical properties tensile strength weathering WPC. Gunjal,Jayashri Aggarwal,Pankaj Chauhan,Shakti Changes in colour and mechanical properties of wood polypropylene composites on natural weathering
description	Abstract: This comparative study focused on understanding the effect of coupling agent and particle size on weathering behaviour of wood polypropylene composite. Two coupling agents, namely maleic anhydride grafted polypropylene and m-TMI (m-Isopropenyl-α,α? dimethylbenzyl isocyanate) grafted polypropylene were used in preparation of the composites. The composites were exposed to outdoor conditions for one year and changes in surface colour and mechanical properties were measured after 2, 4, 8 and 12 months of natural weathering. During the initial four months of weathering considerable colour change was observed with increase in lightness. Mechanical properties were unaffected largely for the initial four months and thereafter started declining. Overall, tensile strength decreased by about 15 % and flexural strength decreased by about 8 % after one year of weathering. The flexural modulus also decreased by about 10 %. Wood particle size was found to affect the aesthetic and strength of the composites after natural weathering. Coupling agents had a positive impact on mechanical properties however their influence on weathering degradation was not noticeable.
author	Gunjal,Jayashri Aggarwal,Pankaj Chauhan,Shakti
author_facet	Gunjal,Jayashri Aggarwal,Pankaj Chauhan,Shakti
author_sort	Gunjal,Jayashri
title	Changes in colour and mechanical properties of wood polypropylene composites on natural weathering
title_short	Changes in colour and mechanical properties of wood polypropylene composites on natural weathering
title_full	Changes in colour and mechanical properties of wood polypropylene composites on natural weathering
title_fullStr	Changes in colour and mechanical properties of wood polypropylene composites on natural weathering
title_full_unstemmed	Changes in colour and mechanical properties of wood polypropylene composites on natural weathering
title_sort	changes in colour and mechanical properties of wood polypropylene composites on natural weathering
publisher	Universidad del Bío-Bío
publishDate	2020
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2020000300325
work_keys_str_mv	AT gunjaljayashri changesincolourandmechanicalpropertiesofwoodpolypropylenecompositesonnaturalweathering AT aggarwalpankaj changesincolourandmechanicalpropertiesofwoodpolypropylenecompositesonnaturalweathering AT chauhanshakti changesincolourandmechanicalpropertiesofwoodpolypropylenecompositesonnaturalweathering
_version_	1714202690013102080

Changes in colour and mechanical properties of wood polypropylene composites on natural weathering

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