Accelerated aging of WPCs Based on Polypropylene and Birch plywood Sanding Dust

A lot of researchers are closely related with natural, lignocellulose fibre containing bio-composites production and studies. Various of polymer matrices, mainly polyolefins, combinations with natural fibres as a reinforcement are used. Our studies are focused on polypropylene based bio-composites c...

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Autores principales:	Kajaks Janis, Kalnins Karlis, Matvejs Juris
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	composites mechanical thermal aging properties Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/7c95db56982d4cd597e64578b02b7422
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spelling	oai:doaj.org-article:7c95db56982d4cd597e64578b02b74222021-12-05T14:10:46ZAccelerated aging of WPCs Based on Polypropylene and Birch plywood Sanding Dust2391-543910.1515/eng-2021-0030https://doaj.org/article/7c95db56982d4cd597e64578b02b74222021-01-01T00:00:00Zhttps://doi.org/10.1515/eng-2021-0030https://doaj.org/toc/2391-5439A lot of researchers are closely related with natural, lignocellulose fibre containing bio-composites production and studies. Various of polymer matrices, mainly polyolefins, combinations with natural fibres as a reinforcement are used. Our studies are focused on polypropylene based bio-composites containing birch plywood production by-product sanding dust (PSD) accelerated weathering processes. The obtained results showed the following sight. After the aging the surface of all samples had faded, the changes of the gloss (decreasing) and of the whiteness degree (increasing) also had taken place, but microhardness of the surface of specimens significantly has decreased. The tensile strength and modulus of the samples after UV aging diminished about 30–35%. That indicates to the changes not only in the surface layers of polymer but also inside of the polymer structure. The FTIR measurements showed that during UV aging process occurs significant changes of chemical structure of the weathered surface of all samples. DSC measurements showed an increase of degree of crystallinity of the weathered polypropylene composites after the first heating due to the recrystallization process in the polypropylene matrix and a small decreasing after second heating. The melting temperatures of all composites after UV aging considerably diminish up to 30°C.Kajaks JanisKalnins KarlisMatvejs JurisDe GruyterarticlecompositesmechanicalthermalagingpropertiesEngineering (General). Civil engineering (General)TA1-2040ENOpen Engineering, Vol 11, Iss 1, Pp 319-328 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	composites mechanical thermal aging properties Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	composites mechanical thermal aging properties Engineering (General). Civil engineering (General) TA1-2040 Kajaks Janis Kalnins Karlis Matvejs Juris Accelerated aging of WPCs Based on Polypropylene and Birch plywood Sanding Dust
description	A lot of researchers are closely related with natural, lignocellulose fibre containing bio-composites production and studies. Various of polymer matrices, mainly polyolefins, combinations with natural fibres as a reinforcement are used. Our studies are focused on polypropylene based bio-composites containing birch plywood production by-product sanding dust (PSD) accelerated weathering processes. The obtained results showed the following sight. After the aging the surface of all samples had faded, the changes of the gloss (decreasing) and of the whiteness degree (increasing) also had taken place, but microhardness of the surface of specimens significantly has decreased. The tensile strength and modulus of the samples after UV aging diminished about 30–35%. That indicates to the changes not only in the surface layers of polymer but also inside of the polymer structure. The FTIR measurements showed that during UV aging process occurs significant changes of chemical structure of the weathered surface of all samples. DSC measurements showed an increase of degree of crystallinity of the weathered polypropylene composites after the first heating due to the recrystallization process in the polypropylene matrix and a small decreasing after second heating. The melting temperatures of all composites after UV aging considerably diminish up to 30°C.
format	article
author	Kajaks Janis Kalnins Karlis Matvejs Juris
author_facet	Kajaks Janis Kalnins Karlis Matvejs Juris
author_sort	Kajaks Janis
title	Accelerated aging of WPCs Based on Polypropylene and Birch plywood Sanding Dust
title_short	Accelerated aging of WPCs Based on Polypropylene and Birch plywood Sanding Dust
title_full	Accelerated aging of WPCs Based on Polypropylene and Birch plywood Sanding Dust
title_fullStr	Accelerated aging of WPCs Based on Polypropylene and Birch plywood Sanding Dust
title_full_unstemmed	Accelerated aging of WPCs Based on Polypropylene and Birch plywood Sanding Dust
title_sort	accelerated aging of wpcs based on polypropylene and birch plywood sanding dust
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/7c95db56982d4cd597e64578b02b7422
work_keys_str_mv	AT kajaksjanis acceleratedagingofwpcsbasedonpolypropyleneandbirchplywoodsandingdust AT kalninskarlis acceleratedagingofwpcsbasedonpolypropyleneandbirchplywoodsandingdust AT matvejsjuris acceleratedagingofwpcsbasedonpolypropyleneandbirchplywoodsandingdust
_version_	1718371731159121920

Accelerated aging of WPCs Based on Polypropylene and Birch plywood Sanding Dust

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