Poliüretan köpük/spacer kumaş kompozitlerinin tasarımı ve karakterizasyonu

Abstract

In recent years, the industry of polyurethane foam has risen due to its unique properties such as light weight, cheap price and good elasticity. For this reason, it has been included in many industries and applications such as thermal insulation, automotive industry, shoe applications and many more. As a result of this, there has been a growing interest in developing the foam to achieve innovative solutions for engineering problems. One of these solutions is combining the foams with spacer fabrics as composites by different methods. In this thesis, we have designed flexible polyurethane foam/spacer fabric composites with different polyurethane foams containing different formulations and methods, spacer fabrics with different yarn linear densities and thickness were used to investigate how this will affect the mechanical properties of the composite structures. We used three different types of composites of foam/spacer fabrics, immersed (IM), sandwich (SAN) and impregnated (IMP). We applied compression test to these three types and compared the results. We also tested the immersed composites for air permeability to investigate the effect of adding spacer fabrics to the foam. We also calculated densities and weight percent of spacer fabrics in these composites. The compression test results for type 1 spacer fabric were 83%, 99% and 91% for composites IM1, SAN1 and IMP1 respectively, and for type 2 spacer fabric it showed results of 66%, 74% and 75% for composites IM2, SAN2 and IMP2 respectively. The air permeability test results show average values of 3.33, 20.6, 33.6 and 52 (l/m2/s) for composites IM1, IM2, IM3 and IM4 respectively. No results for other types of composites could be obtained. Also, density measurements were obtained from these composites which was 124.2, 124.7, 127.1, and 158.5 (kg/m3) for composites SAN1, SAN2, SAN3 and SAN4 respectively, 240, 240, 290 and 260 (kg/m3) for composites IM1, IM2, IM3 and IM4 respectively, 155, 182, 162, and 163 for composites IMP1, IMP2, IMP3, and IMP4 respectively.