iForest - Biogeosciences and Forestry


Heat treatment of poplar plywood: modifications in physical, mechanical and durability properties

Bertrand Marcon (1)   , Joffrey Viguier (1), Kevin Candelier (2-3), Marie-France Thevenon (2-3), Jean-Claude Butaud (1), Luc Pignolet (2-3), Adélaïde Gartili (2-3), Louis Denaud (1), Robert Collet (1)

iForest - Biogeosciences and Forestry, Volume 16, Issue 1, Pages 1-9 (2023)
doi: https://doi.org/10.3832/ifor4159-015
Published: Jan 09, 2023 - Copyright © 2023 SISEF

Research Articles

Plywood made of poplar are limited to indoor usages since poplar exhibits a rather low natural durability. Recently, wood heat treatments have been applied to improve properties such as decay susceptibility and dimensional stability. This study examines the potential of exposing poplar plywood to heat treatment to extend the potential of applications of this engineered wood product to outdoor end uses, and new markets accordingly. Plywood panels were glued with two different adhesive formulations based on the same melamine-urea-formaldehyde (MUF) resin to compare their respective ability to resist to the heat treatment. These different plywoods were thermally modified in saturated steam conditions at 215 °C for 2 hours following the ThermoWood® process, up to reach 14% in mass loss. The durability improvement brought by the heat treatment was assessed in order to evaluate any possible outdoor uses for such plywood. After all the conducted analyses, the potential to use heat treated poplar plywoods in humid interior and protected exterior service conditions was confirmed.


Heat Treatment, Plywood, Poplar, Bending Modulus of Elasticity, Bending Strength, Bond Quality, Fungal Durability, Termite Resistance

Corresponding author

Bertrand Marcon


Marcon B, Viguier J, Candelier K, Thevenon M-F, Butaud J-C, Pignolet L, Gartili A, Denaud L, Collet R (2023). Heat treatment of poplar plywood: modifications in physical, mechanical and durability properties. iForest 16: 1-9. - doi: 10.3832/ifor4159-015

Academic Editor

Manuela Romagnoli

Paper history

Received: Jun 16, 2022
Accepted: Nov 07, 2022

First online: Jan 09, 2023
Publication Date: Feb 28, 2023
Publication Time: 2.10 months

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