Matej Jošt (Author), Milan Šernek (Author)

Abstract

The development of the shear strength of the phenol-formaldehyde (PF) adhesive bond during curing was investigated. Five different PF adhesive mixtures and 1.1 mm thick peeled beech (Fagus sylvatica L.) veneer were used to produce lap-shear specimens, which were cured at a pressing temperature of C. Dielectric analysis (DEA) and modified ABES (automated bonding evaluation system) were used to evaluate the physical-chemical and mechanical aspects of PF adhesive cure in a miniature hot-press. The degree of cure, which was calculated from conductivity data, was dependent on pressing time and the composition of the PF adhesive. An addition of rye flour to the PF adhesive significantly postponed the curing process as determined by DEA. It was found that the adhesive bond started to develop in the last stage of the curing (vitrification), by which time most of the physical-chemical conversion of the adhesive had been completed.

Keywords

phenol;wood;shear strength;DEA;ABES;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL BF - Biotechnical Faculty
UDC: 630*824.83
COBISS: 1662089 Link will open in a new window
ISSN: 0043-7719
Views: 973
Downloads: 491
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Other data

Secondary language: English
Secondary keywords: fenol;les;strižna trdnost;
Pages: str. 153-166
Volume: ǂVol. ǂ43
Issue: ǂno. ǂ1/2
Chronology: 2009
ID: 10847059