Effect of thermal modification on physical and mechanical behavior of sunflower-polypropylene composites

The Use of agricultural plants wastes as an alternative forest resources in the cellulose industry can be recommended due to the severe shortage of wood raw material and restriction of forest harvesting. The aim of current research was to investigate the effect of thermal modification on applied pro...

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Autores principales:	Maryam Ghorbani, null null, farhad fooladian
Formato:	article
Lenguaje:	FA
Publicado:	Regional Information Center for Science and Technology (RICeST) 2017
Materias:	Thermal modification sunflower-polypropylene composites Thermal stability physical properties mechanical behavior Forestry SD1-669.5
Acceso en línea:	https://doaj.org/article/5ade6b4a88434127ac3f6fc451a1c857
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id	oai:doaj.org-article:5ade6b4a88434127ac3f6fc451a1c857
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spelling	oai:doaj.org-article:5ade6b4a88434127ac3f6fc451a1c8572021-12-02T07:00:16ZEffect of thermal modification on physical and mechanical behavior of sunflower-polypropylene composites1735-09132383-112X10.22092/ijwpr.2017.110664.1414https://doaj.org/article/5ade6b4a88434127ac3f6fc451a1c8572017-10-01T00:00:00Zhttp://ijwpr.areeo.ac.ir/article_112384_e30ee22aee19367119c1e4fb508d10b4.pdfhttps://doaj.org/toc/1735-0913https://doaj.org/toc/2383-112XThe Use of agricultural plants wastes as an alternative forest resources in the cellulose industry can be recommended due to the severe shortage of wood raw material and restriction of forest harvesting. The aim of current research was to investigate the effect of thermal modification on applied properties of composite made from sunflower stem flour-polypropylene. Thermal modification of sunflower stems was done at temperatures of 160, 180 and 200°C for 30 minutes and mixed with polypropylene in ratio of 30wt%. Test samples were prepared with maleic anhydride-grafted polypropylene as coupling agent by injection molding method. FTIR spectroscopy of sunflower stem flour confirmed the chemically changes due to thermal modification. More integration and uniform distribution, and less cavities were observed in the scanning electron micrographs of failure surface. The removal of hemicellulose of sunflower stem flour improved the thermal stability of composite, which thermal gravimetric analyzer (TGA) confirmed it with increasing in modification temperature up to 180°C. Modification at 200°C decreased thermal stability compared to other temperatures. Thermal modification leads to significant decrease in water absorption and improvement in bending and tensile properties due to hemicellulose degradation, increasing the crystallinity, loss of polarity, increased compatibility between the two phases of composite and uniform distribution of fillers in polymeric matrix. Notched impact strength of modified composites decreased due to better adhesion between lignocellulosic filler and polymer that facilitate the crack development along the interface.Maryam Ghorbaninull nullfarhad fooladianRegional Information Center for Science and Technology (RICeST)articleThermal modificationsunflower-polypropylene compositesThermal stabilityphysical propertiesmechanical behaviorForestrySD1-669.5FAتحقیقات علوم چوب و کاغذ ایران, Vol 32, Iss 3, Pp 392-401 (2017)
institution	DOAJ
collection	DOAJ
language	FA
topic	Thermal modification sunflower-polypropylene composites Thermal stability physical properties mechanical behavior Forestry SD1-669.5
spellingShingle	Thermal modification sunflower-polypropylene composites Thermal stability physical properties mechanical behavior Forestry SD1-669.5 Maryam Ghorbani null null farhad fooladian Effect of thermal modification on physical and mechanical behavior of sunflower-polypropylene composites
description	The Use of agricultural plants wastes as an alternative forest resources in the cellulose industry can be recommended due to the severe shortage of wood raw material and restriction of forest harvesting. The aim of current research was to investigate the effect of thermal modification on applied properties of composite made from sunflower stem flour-polypropylene. Thermal modification of sunflower stems was done at temperatures of 160, 180 and 200°C for 30 minutes and mixed with polypropylene in ratio of 30wt%. Test samples were prepared with maleic anhydride-grafted polypropylene as coupling agent by injection molding method. FTIR spectroscopy of sunflower stem flour confirmed the chemically changes due to thermal modification. More integration and uniform distribution, and less cavities were observed in the scanning electron micrographs of failure surface. The removal of hemicellulose of sunflower stem flour improved the thermal stability of composite, which thermal gravimetric analyzer (TGA) confirmed it with increasing in modification temperature up to 180°C. Modification at 200°C decreased thermal stability compared to other temperatures. Thermal modification leads to significant decrease in water absorption and improvement in bending and tensile properties due to hemicellulose degradation, increasing the crystallinity, loss of polarity, increased compatibility between the two phases of composite and uniform distribution of fillers in polymeric matrix. Notched impact strength of modified composites decreased due to better adhesion between lignocellulosic filler and polymer that facilitate the crack development along the interface.
format	article
author	Maryam Ghorbani null null farhad fooladian
author_facet	Maryam Ghorbani null null farhad fooladian
author_sort	Maryam Ghorbani
title	Effect of thermal modification on physical and mechanical behavior of sunflower-polypropylene composites
title_short	Effect of thermal modification on physical and mechanical behavior of sunflower-polypropylene composites
title_full	Effect of thermal modification on physical and mechanical behavior of sunflower-polypropylene composites
title_fullStr	Effect of thermal modification on physical and mechanical behavior of sunflower-polypropylene composites
title_full_unstemmed	Effect of thermal modification on physical and mechanical behavior of sunflower-polypropylene composites
title_sort	effect of thermal modification on physical and mechanical behavior of sunflower-polypropylene composites
publisher	Regional Information Center for Science and Technology (RICeST)
publishDate	2017
url	https://doaj.org/article/5ade6b4a88434127ac3f6fc451a1c857
work_keys_str_mv	AT maryamghorbani effectofthermalmodificationonphysicalandmechanicalbehaviorofsunflowerpolypropylenecomposites AT nullnull effectofthermalmodificationonphysicalandmechanicalbehaviorofsunflowerpolypropylenecomposites AT farhadfooladian effectofthermalmodificationonphysicalandmechanicalbehaviorofsunflowerpolypropylenecomposites
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Effect of thermal modification on physical and mechanical behavior of sunflower-polypropylene composites

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