Influence of residual lignin content on physical and mechanical properties of kraft pulp/pp composites

The effect of residual lignin content on the mechanical strength and water absorption of kraft pulp/polypropylene composites was studied. To meet this objective, hornbeam wood chips were converted to kraft pulp at three different alkalinities (15, 20, and 25%) and three different cooking times (60,...

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Autores principales:	Kiaei,Majid, Kord,Behzad, Vaysi,Ramin
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2014
Materias:	Alkalinity cooking time residual lignin content mechanical properties water absorption
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2014000400011
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spelling	oai:scielo:S0718-221X20140004000112014-10-10Influence of residual lignin content on physical and mechanical properties of kraft pulp/pp compositesKiaei,MajidKord,BehzadVaysi,Ramin Alkalinity cooking time residual lignin content mechanical properties water absorption The effect of residual lignin content on the mechanical strength and water absorption of kraft pulp/polypropylene composites was studied. To meet this objective, hornbeam wood chips were converted to kraft pulp at three different alkalinities (15, 20, and 25%) and three different cooking times (60, 90, and 120 min). The residual lignin contents of these pulps were determined according to the TAPPI standard. Kraft pulp was mixed with polypropylene (PP) at 50% weight ratios. The amount of maleic anhydride (MAPP) coupling agent was fixed at 4 per hundred compounds (phc) for all formulations. The results indicated that the lignin residual content decreased with increasing cooking time and alkalinity in kraft pulp. Also, it was found that tensile strength, tensile modulus, flexural strength, and flexural modulus were increased by increasing the alkalinity and cooking time; however, the notched impact strength and water absorption decreased. Overall, decreasing the lignin content had a positive impact on the flexural and tensile properties and had a negative effect on the notched impact strength.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.16 n.4 20142014-10-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2014000400011en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Alkalinity cooking time residual lignin content mechanical properties water absorption
spellingShingle	Alkalinity cooking time residual lignin content mechanical properties water absorption Kiaei,Majid Kord,Behzad Vaysi,Ramin Influence of residual lignin content on physical and mechanical properties of kraft pulp/pp composites
description	The effect of residual lignin content on the mechanical strength and water absorption of kraft pulp/polypropylene composites was studied. To meet this objective, hornbeam wood chips were converted to kraft pulp at three different alkalinities (15, 20, and 25%) and three different cooking times (60, 90, and 120 min). The residual lignin contents of these pulps were determined according to the TAPPI standard. Kraft pulp was mixed with polypropylene (PP) at 50% weight ratios. The amount of maleic anhydride (MAPP) coupling agent was fixed at 4 per hundred compounds (phc) for all formulations. The results indicated that the lignin residual content decreased with increasing cooking time and alkalinity in kraft pulp. Also, it was found that tensile strength, tensile modulus, flexural strength, and flexural modulus were increased by increasing the alkalinity and cooking time; however, the notched impact strength and water absorption decreased. Overall, decreasing the lignin content had a positive impact on the flexural and tensile properties and had a negative effect on the notched impact strength.
author	Kiaei,Majid Kord,Behzad Vaysi,Ramin
author_facet	Kiaei,Majid Kord,Behzad Vaysi,Ramin
author_sort	Kiaei,Majid
title	Influence of residual lignin content on physical and mechanical properties of kraft pulp/pp composites
title_short	Influence of residual lignin content on physical and mechanical properties of kraft pulp/pp composites
title_full	Influence of residual lignin content on physical and mechanical properties of kraft pulp/pp composites
title_fullStr	Influence of residual lignin content on physical and mechanical properties of kraft pulp/pp composites
title_full_unstemmed	Influence of residual lignin content on physical and mechanical properties of kraft pulp/pp composites
title_sort	influence of residual lignin content on physical and mechanical properties of kraft pulp/pp composites
publisher	Universidad del Bío-Bío
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2014000400011
work_keys_str_mv	AT kiaeimajid influenceofresiduallignincontentonphysicalandmechanicalpropertiesofkraftpulpppcomposites AT kordbehzad influenceofresiduallignincontentonphysicalandmechanicalpropertiesofkraftpulpppcomposites AT vaysiramin influenceofresiduallignincontentonphysicalandmechanicalpropertiesofkraftpulpppcomposites
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Influence of residual lignin content on physical and mechanical properties of kraft pulp/pp composites

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