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Accessible 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, Chen-Ling Kang, Kuo-Chun Chang and Yi-Chun Chen
From the journal

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