Investigation on the Effect of UF resin polymerization variable on strength of Uf bonded Hornbeam particleboard

In this investigation, the effect of mat moisture content, press temperature and time on polymerization reaction of urea-formaldehyde (UF) resin and the strength of UF bonded hornbeam particleboard is studied. Variation of three variables is as followed: -mat moisture content; 10, 13 and 16% (Based...

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Auteurs principaux:	Ahmad Jahan latibari, Abdolrahman Hosseinzadeh, Taghi Tabarsa
Format:	article
Langue:	FA
Publié:	Regional Information Center for Science and Technology (RICeST) 1996
Sujets:	PRESS TEMPERATURE PRESS TIME mat moisture content MOR MOE IB Forestry SD1-669.5
Accès en ligne:	https://doaj.org/article/65bee970c80a40a79517d351f1f6d0c2
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spelling	oai:doaj.org-article:65bee970c80a40a79517d351f1f6d0c22021-12-02T02:20:06ZInvestigation on the Effect of UF resin polymerization variable on strength of Uf bonded Hornbeam particleboard1735-09132383-112X10.22092/ijwpr.1996.117435https://doaj.org/article/65bee970c80a40a79517d351f1f6d0c21996-09-01T00:00:00Zhttp://ijwpr.areeo.ac.ir/article_117435_b07bec6a637daf6f3236c478d5d87543.pdfhttps://doaj.org/toc/1735-0913https://doaj.org/toc/2383-112XIn this investigation, the effect of mat moisture content, press temperature and time on polymerization reaction of urea-formaldehyde (UF) resin and the strength of UF bonded hornbeam particleboard is studied. Variation of three variables is as followed: -mat moisture content; 10, 13 and 16% (Based on oven dry weight of wood) -Press temperature; 150, 170 and 190 ᵒC -Press time; 4, 6, and 8 min. Fore boards were manufactured for each combination of variables. Modulus of rupture (MOR), modulus of elasticity (MOE), Internal bond (IB), water absorption (Wa2 and Wa24) and thickness swelling (Ts2 and Ts24) after 2 and 24 hours immersion in water were determined according to ASTM 1037 standard. All data was analyzed using factorial design. The effect of mat moisture content on MOR was not statically different, but its effect on MOE was statistically different at 5% significance level, and increasing the mat moisture content from 10 to 16% bout MOR & MOE. Highest level of MOE (4262 MPa) corresponds to board pressed at 16% mat moisture content. On the contrary, mat moisture content decreased the IB and lowest value of IB ( 1.447 MPa) corresponds to boards pressed at 16% mat moisture content. The effect of mat moisture content on IB was statistically different at 1% significance level. Increasing mat moisture content decreased water absorption and increased thickness swelling. Lowest Wa2 & Wa24 was observed on boards pressed at 16% mat moisture content (67.35% & 86.78% respectively) and lowest Ts2 & Ts24 was observed on boards pressed at 10% mat moisture content (21.89% & 27.32% respectively). There force for the production of suitable boards, ma moisture content must be kept at 10-13% range.Ahmad Jahan latibariAbdolrahman HosseinzadehTaghi TabarsaRegional Information Center for Science and Technology (RICeST)articlePRESS TEMPERATUREPRESS TIMEmat moisture contentMORMOEIBForestrySD1-669.5FAتحقیقات علوم چوب و کاغذ ایران, Vol 1, Iss 1 شماره 148, Pp 1-53 (1996)
institution	DOAJ
collection	DOAJ
language	FA
topic	PRESS TEMPERATURE PRESS TIME mat moisture content MOR MOE IB Forestry SD1-669.5
spellingShingle	PRESS TEMPERATURE PRESS TIME mat moisture content MOR MOE IB Forestry SD1-669.5 Ahmad Jahan latibari Abdolrahman Hosseinzadeh Taghi Tabarsa Investigation on the Effect of UF resin polymerization variable on strength of Uf bonded Hornbeam particleboard
description	In this investigation, the effect of mat moisture content, press temperature and time on polymerization reaction of urea-formaldehyde (UF) resin and the strength of UF bonded hornbeam particleboard is studied. Variation of three variables is as followed: -mat moisture content; 10, 13 and 16% (Based on oven dry weight of wood) -Press temperature; 150, 170 and 190 ᵒC -Press time; 4, 6, and 8 min. Fore boards were manufactured for each combination of variables. Modulus of rupture (MOR), modulus of elasticity (MOE), Internal bond (IB), water absorption (Wa2 and Wa24) and thickness swelling (Ts2 and Ts24) after 2 and 24 hours immersion in water were determined according to ASTM 1037 standard. All data was analyzed using factorial design. The effect of mat moisture content on MOR was not statically different, but its effect on MOE was statistically different at 5% significance level, and increasing the mat moisture content from 10 to 16% bout MOR & MOE. Highest level of MOE (4262 MPa) corresponds to board pressed at 16% mat moisture content. On the contrary, mat moisture content decreased the IB and lowest value of IB ( 1.447 MPa) corresponds to boards pressed at 16% mat moisture content. The effect of mat moisture content on IB was statistically different at 1% significance level. Increasing mat moisture content decreased water absorption and increased thickness swelling. Lowest Wa2 & Wa24 was observed on boards pressed at 16% mat moisture content (67.35% & 86.78% respectively) and lowest Ts2 & Ts24 was observed on boards pressed at 10% mat moisture content (21.89% & 27.32% respectively). There force for the production of suitable boards, ma moisture content must be kept at 10-13% range.
format	article
author	Ahmad Jahan latibari Abdolrahman Hosseinzadeh Taghi Tabarsa
author_facet	Ahmad Jahan latibari Abdolrahman Hosseinzadeh Taghi Tabarsa
author_sort	Ahmad Jahan latibari
title	Investigation on the Effect of UF resin polymerization variable on strength of Uf bonded Hornbeam particleboard
title_short	Investigation on the Effect of UF resin polymerization variable on strength of Uf bonded Hornbeam particleboard
title_full	Investigation on the Effect of UF resin polymerization variable on strength of Uf bonded Hornbeam particleboard
title_fullStr	Investigation on the Effect of UF resin polymerization variable on strength of Uf bonded Hornbeam particleboard
title_full_unstemmed	Investigation on the Effect of UF resin polymerization variable on strength of Uf bonded Hornbeam particleboard
title_sort	investigation on the effect of uf resin polymerization variable on strength of uf bonded hornbeam particleboard
publisher	Regional Information Center for Science and Technology (RICeST)
publishDate	1996
url	https://doaj.org/article/65bee970c80a40a79517d351f1f6d0c2
work_keys_str_mv	AT ahmadjahanlatibari investigationontheeffectofufresinpolymerizationvariableonstrengthofufbondedhornbeamparticleboard AT abdolrahmanhosseinzadeh investigationontheeffectofufresinpolymerizationvariableonstrengthofufbondedhornbeamparticleboard AT taghitabarsa investigationontheeffectofufresinpolymerizationvariableonstrengthofufbondedhornbeamparticleboard
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Investigation on the Effect of UF resin polymerization variable on strength of Uf bonded Hornbeam particleboard

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