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Reactive maleic anhydride polyolefins (MAPOs) in oriented strand board. Part 2: Influence on physical and mechanical properties

  • Sudip Chowdhury and Vikram Yadama EMAIL logo
Published/Copyright: October 21, 2010
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Holzforschung
From the journal Holzforschung Volume 65 Issue 1

Abstract

The use of reactive polyolefin and phenol formaldehyde (PF) resin blends to improve the moisture durability of oriented strand composite (OSC) panels was investigated. Test panels were hot pressed with adhesive blends consisting of varying proportions of PF and maleic anhydride polypropylene (MAPP) anionic emulsion, and their physical and mechanical properties were evaluated. The addition of MAPP did not significantly affect the modulus of elasticity (MOE) of the panels, but reduced the modulus of rupture in bending (MOR) for 12% moisture content (MC) and 24-h soak specimens. An increase in PF content significantly improved the MOE and MOR of specimens subjected to the environment. Adding MAPP reduced internal bond strength, particularly at higher PF levels. The addition of MAPP and raising PF levels significantly reduced water absorption and thickness swelling of the panels. At higher MAPP levels, the water vapor transmission in OSC as well as the permeance of the material, was reduced. Composite board equilibrated to lower MC with increasing MAPP content in the resin blend. The results indicate that increasing the PF content is the most effective method of improving both moisture resistance and the mechanical properties of OSC; addition of MAPP improves the moisture resistance of the panels, but significantly reduces their mechanical properties.

Keywords: coupling agent; diffusion constant; durability; equilibrium moisture content; maleic anhydride polypropylene; oriented strand board; permeance
Corresponding author. Composite Materials and Engineering Center, Department of Civil and Environmental Engineering, Washington State University, P.O. Box 641806, Pullman, WA 99164-1806, USA Phone: +1-509-335-6261
Received: 2010-1-19
Accepted: 2010-9-1
Published Online: 2010-10-21
Published in Print: 2011-01-01

©2011 by Walter de Gruyter Berlin New York

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https://doi.org/10.1515/hf.2011.002
Keywords for this article
coupling agent; diffusion constant; durability; equilibrium moisture content; maleic anhydride polypropylene; oriented strand board; permeance

Articles in the same Issue

  1. Publisher's Note
  2. Publisher's Note
  3. Original papers
  4. Novel paper sizing agents from renewables. Part 1: Preparation of a paper sizing agent derived from natural plant oils
  5. Novel paper sizing agents from renewables. Part 2: Characterization of maleated high oleic sunflower oil (MSOHO)
  6. Novel paper sizing agents from renewables. Part 3: Emulsion stability and hydrolysis behavior compared to conventional sizes
  7. Energy saving potential of high yield pulp (HYP) application by addition of small amounts of bleached wheat straw pulp
  8. Characterisation of Norway spruce hemicelluloses extracted by pressurised hot-water extraction (ASE) in the presence of sodium bicarbonate
  9. Fractionation and characterization of lignin-carbohydrate complexes (LCCs) from eucalyptus fibers
  10. Conditioning hardwood-derived pre-pulping extracts for use in fermentation through removal and recovery of acetic acid using trioctylphosphine oxide (TOPO)
  11. Xylitol production from olive-pruning debris by sulphuric acid hydrolysis and fermentation with Candida tropicalis
  12. Changes caused by heat treatment in chemical composition and some physical properties of acacia hybrid sapwood
  13. Near infrared spectroscopy (NIRS) as a potential tool for monitoring trade of similar woods: Discrimination of true mahogany, cedar, andiroba, and curupixá
  14. Reactive maleic anhydride polyolefins (MAPOs) in oriented strand board. Part 1: Dynamic thermomechanical properties of phenol formaldehyde resins blended with two MAPOs
  15. Reactive maleic anhydride polyolefins (MAPOs) in oriented strand board. Part 2: Influence on physical and mechanical properties
  16. Theoretical analysis of moisture transport in wood as an open porous hygroscopic material
  17. A multinuclear magnetic resonance imaging (MRI) study of wood with adsorbed water: Estimating bound water concentration and local wood density
  18. Mechanical characterization of single bamboo fibers with nanoindentation and microtensile technique
  19. Longitudinal mechanical properties of cell wall of Masson pine (Pinus massoniana Lamb) as related to moisture content: A nanoindentation study
  20. Short Note
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  23. Meetings
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