Physico-mechanical properties and long-term creep behavior of wood-plastic composites for construction materials: Effect of water immersion times

The optimal formulation described by Srivabut C. et al. (2019) of 51.8 wt% rPP, 35.9 wt% RWF, 7.2 wt% CC, 3.9 wt% MAPP, 0.2 wt% UV stabilizer, and 1.0 wt% Lub was used in the study, it was shown to possess the best mechanical and physical properties for wood-plastic composites (WPCs). This formulati...

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Autores principales:	Thanate Ratanawilai, Chainarong Srivabut
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2022
Materias:	Wood-plastic composites (WPCs) Creep behavior Mechanical properties Water immersion Time-stress superposition (TSS) principle Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/c92d282a2f474f4185e94a98acc8ec26
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spelling	oai:doaj.org-article:c92d282a2f474f4185e94a98acc8ec262021-11-24T04:31:06ZPhysico-mechanical properties and long-term creep behavior of wood-plastic composites for construction materials: Effect of water immersion times2214-509510.1016/j.cscm.2021.e00791https://doaj.org/article/c92d282a2f474f4185e94a98acc8ec262022-06-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2214509521003065https://doaj.org/toc/2214-5095The optimal formulation described by Srivabut C. et al. (2019) of 51.8 wt% rPP, 35.9 wt% RWF, 7.2 wt% CC, 3.9 wt% MAPP, 0.2 wt% UV stabilizer, and 1.0 wt% Lub was used in the study, it was shown to possess the best mechanical and physical properties for wood-plastic composites (WPCs). This formulation was used to investigate the mechanical and physical properties and effects of stress, temperature, and time on flexural creep with 35% of the ultimate flexural strength, after water immersion for various times. In addition, the time-stress superposition (TSS) principle was used to predict the lifetime for WPCs. The results showed that the mechanical properties generally decreased up to 40% with immersion time in which samples absorb water quickly in the first week, after which these absorption increases more slowly until the saturation point. This is most likely due to the increase of free OH groups in the composites and the long-term absorption, resulting the decrease of mechanical resistance of the WPCs. All of the WPC specimens experienced increased lightness and total color change, indicative of fading or lightening. The L* of the control sample had lower lightness than WPCs immersed for 1, 5, and 10 weeks. Also, the ∆E* in all cases increased with immersion time until 10 weeks. Almost no color change was observed in first week of immersion, after which it gradually increased. The creep behavior of WPCs was dependent on stress, temperature, and water immersion time, increasing with all of these. The master curve from time-stress superposition principle was in a good agreement with R2 of 87.45% for long-term creep. It was found that the lifetime predictions of WPC products exceeded 10 years for 3 MPa stress at 25 °C (control sample). However, the WPCs after 10 weeks of water immersion showed poorer performance, with lifetimes of the composite products under 3 and 15 MPa stress at 25 °C estimated to not reach 5 years.Thanate RatanawilaiChainarong SrivabutElsevierarticleWood-plastic composites (WPCs)Creep behaviorMechanical propertiesWater immersionTime-stress superposition (TSS) principleMaterials of engineering and construction. Mechanics of materialsTA401-492ENCase Studies in Construction Materials, Vol 16, Iss , Pp e00791- (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	Wood-plastic composites (WPCs) Creep behavior Mechanical properties Water immersion Time-stress superposition (TSS) principle Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Wood-plastic composites (WPCs) Creep behavior Mechanical properties Water immersion Time-stress superposition (TSS) principle Materials of engineering and construction. Mechanics of materials TA401-492 Thanate Ratanawilai Chainarong Srivabut Physico-mechanical properties and long-term creep behavior of wood-plastic composites for construction materials: Effect of water immersion times
description	The optimal formulation described by Srivabut C. et al. (2019) of 51.8 wt% rPP, 35.9 wt% RWF, 7.2 wt% CC, 3.9 wt% MAPP, 0.2 wt% UV stabilizer, and 1.0 wt% Lub was used in the study, it was shown to possess the best mechanical and physical properties for wood-plastic composites (WPCs). This formulation was used to investigate the mechanical and physical properties and effects of stress, temperature, and time on flexural creep with 35% of the ultimate flexural strength, after water immersion for various times. In addition, the time-stress superposition (TSS) principle was used to predict the lifetime for WPCs. The results showed that the mechanical properties generally decreased up to 40% with immersion time in which samples absorb water quickly in the first week, after which these absorption increases more slowly until the saturation point. This is most likely due to the increase of free OH groups in the composites and the long-term absorption, resulting the decrease of mechanical resistance of the WPCs. All of the WPC specimens experienced increased lightness and total color change, indicative of fading or lightening. The L* of the control sample had lower lightness than WPCs immersed for 1, 5, and 10 weeks. Also, the ∆E* in all cases increased with immersion time until 10 weeks. Almost no color change was observed in first week of immersion, after which it gradually increased. The creep behavior of WPCs was dependent on stress, temperature, and water immersion time, increasing with all of these. The master curve from time-stress superposition principle was in a good agreement with R2 of 87.45% for long-term creep. It was found that the lifetime predictions of WPC products exceeded 10 years for 3 MPa stress at 25 °C (control sample). However, the WPCs after 10 weeks of water immersion showed poorer performance, with lifetimes of the composite products under 3 and 15 MPa stress at 25 °C estimated to not reach 5 years.
format	article
author	Thanate Ratanawilai Chainarong Srivabut
author_facet	Thanate Ratanawilai Chainarong Srivabut
author_sort	Thanate Ratanawilai
title	Physico-mechanical properties and long-term creep behavior of wood-plastic composites for construction materials: Effect of water immersion times
title_short	Physico-mechanical properties and long-term creep behavior of wood-plastic composites for construction materials: Effect of water immersion times
title_full	Physico-mechanical properties and long-term creep behavior of wood-plastic composites for construction materials: Effect of water immersion times
title_fullStr	Physico-mechanical properties and long-term creep behavior of wood-plastic composites for construction materials: Effect of water immersion times
title_full_unstemmed	Physico-mechanical properties and long-term creep behavior of wood-plastic composites for construction materials: Effect of water immersion times
title_sort	physico-mechanical properties and long-term creep behavior of wood-plastic composites for construction materials: effect of water immersion times
publisher	Elsevier
publishDate	2022
url	https://doaj.org/article/c92d282a2f474f4185e94a98acc8ec26
work_keys_str_mv	AT thanateratanawilai physicomechanicalpropertiesandlongtermcreepbehaviorofwoodplasticcompositesforconstructionmaterialseffectofwaterimmersiontimes AT chainarongsrivabut physicomechanicalpropertiesandlongtermcreepbehaviorofwoodplasticcompositesforconstructionmaterialseffectofwaterimmersiontimes
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Physico-mechanical properties and long-term creep behavior of wood-plastic composites for construction materials: Effect of water immersion times

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