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Licensed Unlicensed Requires Authentication Published by De Gruyter July 19, 2011

Synthesis and properties of resol-type phenol-formaldehyde resins prepared from H2SO4- and HCl-catalyzed phenol-liquefied Cryptomeria japonica wood

  • Wen-Jau Lee EMAIL logo , Chen-Ling Kang , Kuo-Chun Chang and Yi-Chun Chen
From the journal Holzforschung

Abstract

Wood of Cryptomeria japonica (Japanese cedar) was liquefied in phenol with H2SO4 or HCl as catalysts and used as raw materials to prepare phenol-formaldehyde (PF) resins. The curing behavior and adhesion properties of resins prepared were investigated. Wood liquefied with H2SO4 as a catalyst had better liquefaction effect than that with HCl; however, the reaction of resin synthesis was hard to control due to its quickly increasing viscosity. Differential scanning calorimetry analysis shows that PF resins prepared from HCl-catalyzed liquefied wood had higher reactivity than those of H2SO4-catalyzed wood. These PF resins were employed for manufacturing three-layer plywood. The wet bonding strength of plywood prepared with resins from HCl-catalyzed liquefied wood exceeded 0.7 MPa and fulfilled the requirement of the CNS 1349 standard.


Corresponding author. Department of Forestry, National Chung-Hsing University No. 250, Kuo Kuang Road, Taichung, 402 Taiwan

Received: 2010-11-16
Accepted: 2011-6-11
Published Online: 2011-07-19
Published in Print: 2012-01-01

©2012 by Walter de Gruyter Berlin Boston

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