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Structural Performance of Fire-Retardant Treated Plywood: Effect of Elevated Temperature

  • Song-Yung Wang and Yu-Chen Rao
Published/Copyright: June 1, 2005
Holzforschung
From the journal Volume 53 Issue 5

Summary

This paper was designed to investigate the change of bending strength, bonding shear strength and surface fire-retardant (FR) performance of FR treated plywood after accelerated degradation treatment at elevated temperature (77 °C) and medium humidity (50%RH) condition. Furthermore, thermogravimetry analysis (TGA) and differential scanning curves (DSC) analysis were also conducted to explore their thermal degradation. PF-bonded Red meranti (Shorea spp.) and radiata pine (Pinus radiata) plywood, FR chemicals of AF21 and Lee-An 302 were used.

Results indicated that the bending strength and bonding shear strength of non-FR treated and FR treated plywood decreased linearly with the increase of treatment durations. After 80 days of accelerated degradation treatment, the reduction ratio ( %) of bending strength ranged from 6.5% to 33.4% and varied with treatment conditions, whereas 12.8% to 42.3% reduction ratios were observed in bonding shear strength. After subjected to accelerated degradation treatment FR treated plywood could meet the requirement of the third grade FR performance as specified by CNS 6532 standard except those treated with Lee-An 302 FR for 20 days and 40 days. Furthermore, based on TGA, the weight loss of FR treated plywood was found to be less than that of non-FR treated plywoods. After thermal degradation under 100°C, the residual weight of FR treated plywood was higher than that of non-FR treated plywoods.

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Published Online: 2005-06-01
Published in Print: 1999-09-10

Copyright © 1999 by Walter de Gruyter GmbH & Co. KG

Articles in the same Issue

  1. The Significance of Accelerated Laboratory Testing Methods Determining the Natural Durability of Wood
  2. The Thermomechanical Behaviour of Wood Subject to Fungal Decay
  3. Fixation of Chromium in Wood from Trivalent Chromium Salt Solutions
  4. Spatial Distribution of Metal Ions in Spruce Wood by Synchrotron Radiation Microbeam X-Ray Fluorescence Analysis
  5. Chemical Composition of Lipophilic Extractives from Eucalyptus globulus Labill. Wood
  6. Antifungal Compounds in the Ethyl Acetate Soluble Fraction of the Extractives of Taiwania (Taiwania cryptomerioides Hayata) Heartwood
  7. Efficacy of Pinosylvins against White-Rot and Brown-Rot Fungi
  8. Investigations into Laccase-Mediator Delignification of Kraft Pulps
  9. Cell-Wall-Associated Oxidases from the Lignifying Xylem of Angiosperms and Gymnosperms: Monolignol Oxidation
  10. Atmospheric Acetic Acid Pulping of Rice Straw IV: Physico-Chemical Characterization of Acetic Acid Lignins from Rice Straw and Woods. Part 1. Physical Characteristics
  11. Lignin-Polyphenol Interaction in Azobe (Lophira alata) Heartwood. A Study on Milled Wood Lignin (MWL) and Klason Residues
  12. Electrospray Ionization Mass Spectrometry as a Tool for Lignins Molecular Weight and Structural Characterisation
  13. Determination of Phenolic Hydroxyl Groups in Lignin by Combined Use of 1H NMR and UV Spectroscopy
  14. The Effective Diffusion Coefficient and Mass Transfer Coefficient of Nordic Softwoods as Calculated from Direct Drying Experiments
  15. Stress Relaxation of Sugi (Cryptomeria japonica D.Don) Wood in Radial Compression under High Temperature Steam
  16. Structural Performance of Fire-Retardant Treated Plywood: Effect of Elevated Temperature
  17. Sorption Behaviour and Dimensional Changes of Wood-Coating Composites
  18. Literature Reports
https://doi.org/10.1515/HF.1999.090

Articles in the same Issue

  1. The Significance of Accelerated Laboratory Testing Methods Determining the Natural Durability of Wood
  2. The Thermomechanical Behaviour of Wood Subject to Fungal Decay
  3. Fixation of Chromium in Wood from Trivalent Chromium Salt Solutions
  4. Spatial Distribution of Metal Ions in Spruce Wood by Synchrotron Radiation Microbeam X-Ray Fluorescence Analysis
  5. Chemical Composition of Lipophilic Extractives from Eucalyptus globulus Labill. Wood
  6. Antifungal Compounds in the Ethyl Acetate Soluble Fraction of the Extractives of Taiwania (Taiwania cryptomerioides Hayata) Heartwood
  7. Efficacy of Pinosylvins against White-Rot and Brown-Rot Fungi
  8. Investigations into Laccase-Mediator Delignification of Kraft Pulps
  9. Cell-Wall-Associated Oxidases from the Lignifying Xylem of Angiosperms and Gymnosperms: Monolignol Oxidation
  10. Atmospheric Acetic Acid Pulping of Rice Straw IV: Physico-Chemical Characterization of Acetic Acid Lignins from Rice Straw and Woods. Part 1. Physical Characteristics
  11. Lignin-Polyphenol Interaction in Azobe (Lophira alata) Heartwood. A Study on Milled Wood Lignin (MWL) and Klason Residues
  12. Electrospray Ionization Mass Spectrometry as a Tool for Lignins Molecular Weight and Structural Characterisation
  13. Determination of Phenolic Hydroxyl Groups in Lignin by Combined Use of 1H NMR and UV Spectroscopy
  14. The Effective Diffusion Coefficient and Mass Transfer Coefficient of Nordic Softwoods as Calculated from Direct Drying Experiments
  15. Stress Relaxation of Sugi (Cryptomeria japonica D.Don) Wood in Radial Compression under High Temperature Steam
  16. Structural Performance of Fire-Retardant Treated Plywood: Effect of Elevated Temperature
  17. Sorption Behaviour and Dimensional Changes of Wood-Coating Composites
  18. Literature Reports
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