Thermomechanical behavior of polyurethane nanocomposite foams containing organoclay particles modified with bio-based fatty acid

Önder Karaoğlu E., SARIER N.

THERMOCHIMICA ACTA, cilt.733, 2024 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 733
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1016/j.tca.2024.179693
  • Dergi Adı: THERMOCHIMICA ACTA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Analytical Abstracts, Aquatic Science & Fisheries Abstracts (ASFA), Biotechnology Research Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • İstanbul Kültür Üniversitesi Adresli: Evet

Özet

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 degrees C and 408 degrees 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 degrees C to +155 degrees C and from -60 degrees C to +60 degrees C under cyclic compression of 0.1 N, as well as under linear deformation of 1.0-9.5N at 25 degrees C, indicating that PU-organoclay foams are promising for use in severe environmental conditions.