EFFECTS OF KAOLIN ADDITIONS ON THERMAL BEHAVIORS OF RIGID POLYURETHANE FOAMS

Year 2019, Volume: 5 Issue: 2 - Issue Name: Special Issue 9: International Conference on Mechanical Engineering 2017, Istanbul, Turkey, 70 - 76, 29.01.2019

Nazim Usta

https://doi.org/10.18186/thermal.532095

Cited By: 4

Abstract

Thermal insulation is very
important issue in many industrial applications and different materials are
preferred to satisfy the thermal insulation depending on the applications. One
of the most important properties of the thermal insulation materials is low
thermal conductivity. In addition, the cost of the material is another
important factor. Among the thermal insulation materials, rigid polyurethane
foams are used in automotive, transportation and building sectors due to lower
thermal conductivity. Although the thermal conductivity of the rigid
polyurethane foam is lower than those of many other thermal insulation
materials, other thermal insulation materials may be preferred in some
applications due to their lower costs. Therefore, different natural inorganic
minerals have been added as fillers into the foams, mainly to reduce raw
materials costs. In this study, kaolin, which is a cheap natural inorganic
mineral, was incorporated into rigid polyurethane foams in 5, 10 and 15 % in
mass. Effects of kaolin addition on thermal decomposition and thermal
conductivity of rigid polyurethane foams were investigated. The results
revealed that the incorporations of kaolin into the foams slightly increased
the thermal conductivities of the foams. However, it was found that kaolin
addition enhanced the thermal stability of rigid polyurethane foams. 

Keywords

Rigid Polyurethane, Kaolin, Thermal Conductivity, Thermal Decomposition

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