EFFECT OF DRYING TYPES AND POLYSTYRENE DENSITY ON THERMAL CONDUCTIVITY OF POLYSTYRENE COMPOSITE PARTICLEBOARD

Yıl 2019, Cilt: 1 Sayı: 2, 57 - 62, 25.12.2019

Hasan Öztürk , Gürsel Çolakoğlu , Cenk Demirkır

Öz

Thermal conductivity of wood material is superior to other building
materials because of its porous structure. Thermal conductivity is a very
important parameter in determining heat transfer rate and is required for
development of drying models in industrial operations such as adhesive cure
rate. Thermal conductivity is used to estimate the ability of insulation of
material. Thermal conductivity of wood material has varied according to wood
species, direction of wood fiber, resin type, and addictive members used in
manufacture of wood composite panels.

The aim of the study is to produce a new wood composite material with
insulating properties by using insulating material called as polystyrene
instead of formaldehyde based adhesives as bonding material. Five different
wood species (beech, poplar, alder, pine, spruce), six different polystyrene
species with different density values were used in this study and three layers
particleboard in 18 mm thickness was produced. Urea formaldehyde resin (UF) was
used in conventional panels manufacturing as adhesive. Technical drying was
applied half of the test groups, while the other group was conditioned until
reach to 12% equilibrium moisture content at room temperature as natural before
manufacturing process to determine the effect of drying. The thermal
conductivity of new composite panels were determined according to ASTM C 518
& ISO 8301. 

According to the results from the study, thermal conductivity values
obtained from natural drying were found to be higher than technical drying. The
type of binder that gives the lowest thermal conductivity values among tree
species in natural drying is generally S5. The lowest values in technical
drying were obtained from panels bonded with XPS. 

Anahtar Kelimeler

Thermal Conductivity, Polystyrene Composite Particleboard, Drying Types

Proje Numarası

214O743

Kaynakça

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