Abstract
In this study, rigid polyurethane (PU) foams containing 1.0–2.0 wt% organoclay (OC), PU-OC, modified from nanoclay (NC) using octadecanoic acid, a bio-based chemically stable low-cost fatty acid, were synthesized and investigated for their structural, thermal and thermo-mechanical properties in comparison with pure PU and PU-NC foams. PU-OC foams provided good structural integrity and host-guest morphology. Thermogravimetric analyses revealed that the one with 2.0 wt% OC showed improved thermal stability with a significant delay in the decomposition temperatures, with maximum loss rates at 345°C and 408°C, respectively, which were at least 26 K and 8 K higher than their counterparts. PU-OC foams developed more elastic responses in dynamic mechanical tests from -80°C to +155°C and from -60°C to +60°C under cyclic compression of 0.1 N, as well as under linear deformation of 1.0–9.5N at 25°C, indicating that PU-organoclay foams are promising for use in severe environmental conditions.
| Original language | English |
|---|---|
| Article number | 179693 |
| Journal | Thermochimica Acta |
| Volume | 733 |
| DOIs | |
| Publication status | Published - Mar 2024 |
Bibliographical note
Publisher Copyright:© 2024 Elsevier B.V.
Funding
This work has been supported by The Scientific and Technological Research Council of Turkey (TUBITAK) under Grant No. MAG–107M126 . Authors acknowledge financial support from Istanbul Kültür University.
| Funders | Funder number |
|---|---|
| Türkiye Bilimsel ve Teknolojik Araştırma Kurumu | 107M126 |
| T.C. İstanbul Kültür Üniversitesi |
Keywords
- DMA
- Polyurethane foam
- nanocomposite
- organoclay
- thermomechanical properties