Akademik Veri Yönetim Sistemi
INTERNATIONAL SCIENTIFIC JOURNAL "MACHINES. TECHNOLOGIES. MATERIALS, cilt.14, sa.7, ss.292-295, 2020 (Hakemli Dergi)
Effects of various fire retardant (FR) chemicals on mechanical and fire properties of plywoods were investigated. Boron
compounds such as, borax and boric acid; and phospate compounds such as, monoammonium phosphate and diammonium phospahate were
used as fire retardant chemicals in the plywood panels. An exterior liquid phenol formaldehyde resin with 47% solids content was used as
adhesive. The 2.2 mm thick Tetraberlina wood veneers were treated with the liquid solution of FR chemicals. The plywoods having 5-layers
were produced from the treated wood veneers. The mechanical properties of the plywoods produced with treated veneers was found to be
lower than that of the control group. Among the treated plywoods, The plywoods treated with borax had highest mechanical properties,
followed by diammonium phosphate (DAP), monoammonimum phosphate (MAP), and, boric acid, respectively. The FR chemicals improved
the fire resistance of the plywoods. The chemicals showed individually different effects related to improvement of fire resistance of the
panels. For example, the OSB panels treated with diammonium phoshate were the latest ignited group (52.8 s) which were followed by the
panels treated with boric acid (49.2 s), borax (44.5 s), and monoammonium phosphate (41.2 s), respectively. As compared to the control
group (7.5 cm), the plywoods treated with borax (3.6 cm) had the shortest flame length after burner was turn off, followed by diammonium
phosphate (4.2 cm), boric acid (5.1 cm), and monoammonium phosphate (5.8 cm).