Volume 39 (2024-2025)
Volume 38 (2023-2024)
Volume 37 (2022-2023)
Volume 36 (2021-2022)
Volume 35 (2020-2021)
Volume 34 (2019-2020)
Volume 33 (2018-2019)
Volume 32 (2017-2018)
Volume 31 (2016-2017)
Volume 30 (2015-2016)
Volume 29 (2014-2015)
Volume 28 (2013-2014)
Volume 27 (2012-2013)
Volume 26 (2011-2012)
Volume 25 (2010-2011)
Volume 24 (2009-2010)
Volume 23 (2008-2009)
Volume 22 (2007-2008)
Volume 21 (2006-2007)
Volume 20 (2005-2006)
Volume 19 (2004-2005)
Volume 18 (2003-2004)
Volume 17 (2002-2003)
Volume 16 (2002-2003)
Volume 15 (2001-2002)
Volume 14 (2001-2002)
Volume 13 (2001)
Volume 12 (2000-2001)
Volume 11 (2000-2001)
Volume 10 (2000-2001)
Volume 9 (2000)
Volume 8 (1999)
Volume 7 (1999)
Volume 6 (1998)
Volume 5 (1998)
Volume 4 (1997)
Volume 3 (1997)
Volume 2 (1996)
Volume 1 (1995)
Composite wood products
Effect of Adding Several Graphite-Based Materials to Urea Formaldehyde Adhesive on Thermal and Mechanical Properties of MDF board

Reza Jazayeri; Saeed Kazemi Najafi; Habibollah Younesi

Volume 38, Issue 2 , June 2023, , Pages 100-113

https://doi.org/10.22092/ijwpr.2023.354899.1687

Abstract
  This study aimet at to use modified graphite materials as a multifunction additive in the UF resin for improving the properties of medium density fiberboard (MDF). For this purpose expanded graphite EG was synthesized from graphite using the Tsai et al (2011) method. Then, as-synthesized EG was intercalated ...  Read More

Influence of modified graphite on formaldehyde emission from medium density fiberboard ( MDF)

Reza Jazayeri; saeed kazemi najafi; Habibollah Younesi; Abolfazl Kargarfard

Volume 35, Issue 4 , January 2021, , Pages 348-361

https://doi.org/10.22092/ijwpr.2020.343601.1624

Abstract
  In this study, the effect of graphite and two modified graphite materials in reducing formaldehyde emission of medium density fiberboard (MDF) was investigated. For this purpose, expanded graphite (EG) was syntesyzed from graphite (G) and modified expanded graphite (MnO2-EG) was produced through the ...  Read More

Management and Economics wood
Evaluation of Physical and Mechanical Properties of Hygro-thermal Modified Wood

Reza Hajihassani; Behbood Mohebi; Saeid Kazemi Najafi; Parviz Navi

Volume 32, Issue 1 , April 2017, , Pages 1-12

https://doi.org/10.22092/ijwpr.2017.107597

Abstract
  Abstract The present research work has investigated the physical and mechanical properties of hygro-thermally modified poplar (Populus deltoides) wood. The poplar wood blocks were treated hygrothermally at temperatures of 130, 150 and 170°C and for 20, 40 minutes as holding time. The physical and ...  Read More

Composite wood products
Effect of Beech bark Content on Physical and Mechanical Properties of Bark Flour-Polypropylene Composites

Saeid Kazemi najafi; Ali Azimi dalrstani

Volume 26, Issue 4 , January 2012, , Pages 811-823

https://doi.org/10.22092/ijwpr.2011.117256

Abstract
  In this study, physical and mechanical properties of composites made of bark flour and polypropylene were studied and compared with those of wood flour-polypropylene composites. Bark flour content were adjusted at three levels (40, 50 and 60%) and compounded at absence and presence of 2% compatibilizer ...  Read More

Pulp and paper
Use of kraft lignin as compatibilizer in wood flour-polypropylene Composites

Rabi Behroz; Hamed Unsi kord khelili; Saeid Kazemi najafi

Volume 26, Issue 3 , September 2011, , Pages 454-465

https://doi.org/10.22092/ijwpr.2011.117201

Abstract
  Effect of Kraft lignin as a compatibilizer on the short-term water absorption (2 and 24 hours) and mechanical properties of wood flour-polypropylene composites was studied. The black liquor of Chooka pulp and paper mill was acidified and Kraft lignin was extracted by precipitation.  The extracted ...  Read More

Physics and Mechanical Wood
Study bhavior creep composites made mixes particle board and medium density Fiber Board-Recycled from HDPE waste and effect water fiber board absorption on Composites

Morteza Mostafazadeh mrznaki; Saeid kazemi najafi; Majid Chaharmahali; Reza Hajihassani

Volume 24, Issue 2 , October 2009, , Pages 194-205

https://doi.org/10.22092/ijwpr.2009.117374

Abstract
  In study, the influence of flour content and immersion time in water on the creep behavior of composites made from mixes PB (Particle Board) and MDF (Medium Density Fiber Board) flour and high density polyethylene (HDPE) waste and was investigated. Mixing was done by a twin screw extruder and the sample ...  Read More

Physics and anatomy
A Study on water absorption and thickness swelling behavior of wood flour/glass fiber hybrid composites

Alireza Ghotibi far; Saeid Kazemi najafi; Rabi Behroz

Volume 24, Issue 2 , October 2009, , Pages 315-321

https://doi.org/10.22092/ijwpr.2009.117389

Abstract
  This research focused on the influence of content (5, 10 and 15 %) of glass fiber on the water absorption and thickness swelling of wood flour/E-glass fiber hybrid polypropylene composites without and with MAPP. The samples (strips with 10 mm thickness and 70 mm width) were made using a laboratory twin-screw ...  Read More

Composite wood products
A STUDY ON THE LONG TERM WATER ABSORPTION AND THICKNESS SWELLING BEHAVIOR OF WOOD-PLASTIC COMPOSITE PANELS

Majid Chahar mahal; Saeid Kazemi najafi; Mehdi Tajvidi; Reza Hajihassani

Volume 20, No., 2 , December 2006, , Pages 255-270

https://doi.org/10.22092/ijwpr.2005.117585

Abstract
  Wood -Plastic panels were made from high density polyethylene (as resin) and MDF waste and particleboard waste (as natural fiber) at 60, 70 and 80% by weight fiber loading. Density and dimensions of the panels were 1g/cm3and 35*35*1 cm, respectively. Physical properties of the panels including equilibrium ...  Read More

Composite wood products
MECHANICAL PROPERTIES OF WOOD-PLASTIC COMPOSITE MADE FROM PARTICLEBOARD AND MDF WASTES AND POLYETHYLENE (HDPE) WASTES

Majid Chaharmahali; Saeid Kazeminajafi; Mehdi Tajvidi; Mohammad ali Podineh poor

Volume 20, No., 2 , December 2006, , Pages 271-284

https://doi.org/10.22092/ijwpr.2005.117586

Abstract
  The possibility of producing wood-plastic panels using melt blend method was studied in this research and mechanical properties of the panels including flexural modulus, flexural strength, screw and nail withdrawal resistance, and impact strength were studied.Wood -Plastic panels were made from high ...  Read More

Composite wood products
A STUDY ON DENSITY PROFILE OF THREE TYPES OF MEDIUM DENSITY FIBERBAORD (MDF) USED IN IRAN MARKET

Saeid Kazemi najafi; Ali Shalbafan; Majid Charmahali

Volume 20, No., 2 , December 2006, , Pages 285-301

https://doi.org/10.22092/ijwpr.2005.117587

Abstract
  Density profile of three types of medium density fiberboard (MDF) panels used in Iran market was studied through direct method and gradually removing of layer. Modulus of elasticity, bending strength, internal bond, water absorption and thickness swelling were also determined. The results show that the ...  Read More

Physics and Mechanical Wood
RELATIONSHIP BETWEEN MOISTURE CONTENT AND ULTRASONIC WAVE SPEED DURING KILN DRYING OF BASSWOOD LUMBER

Ghanbar Ebrahimi; Hossein Mahjob; Saeid Kazemi najafi

Volume 21, No., 1 , May 2006, , Pages 1-8

https://doi.org/10.22092/ijwpr.2006.117588

Abstract
  Ultrasonic wave speed was measured in the longitudinal direction of Basswood on the top and bottom surfaces and center of lumbers during kiln drying in 3 Kiln load programs with final dry bulb of 80oC and different relative humidities. On the surfaces, wave speed decreased rapidly with MC declining from ...  Read More

Composite wood products
THE EFFECT OF PRODUCING METHOD ON THE MECHANICAL PROPERTIES OF WOOD PLASTIC COMPOSITES MADE FROM PARTICLEBOARD WASTE

Majid Chaharmahali; Saeid Kazemi najafi; Mehdi Tajvidi

Volume 21, No., 1 , May 2006, , Pages 33-42

https://doi.org/10.22092/ijwpr.2006.117591

Abstract
  The possibility of producing wood-plastic panels using two methods including melt blend and dry blend was studied in this research. Methods were compared with each other in order to select the best. Wood-Plastic panels were made from high density polyethylene (as resin) and particle board waste (as natural ...  Read More