1. 1. http://pagev.org/poliuretanlar/ (accessed September 12, 2023)
2. 2.http://emagen.gov.tr/poliuretan-nedir/ (accessed September 12, 2023)
3. 3.Hu, S.; Li, Y.; Industrial Crops and Products. 2014, 57, 188-194.
4. 4.Philips, L. N., and Parker, D. B. V. (1965). Polyurethanes Chemistry, Technology and Properties. Ilife Books Ltd., London.
5. 5.Ferrigno, T.H. Rigid Plastics Foams. Second Edition. Reinhold Publishing Corp./ Chapman-Reinhold. Newyork, NY, 1967; p.146.