“…Moreover, POSS promotes flame retardancy (Bourbigot et al, 2009;Kim et al, 2014;Michalowski & Pielichowski, 2018;Kavuncuoglu et al, 2019;), self-healing (Diao et al, 2015;Behera et al, 2018), scratch protection (Lai et al, 2009;Ghermezcheshme et al, 2015;, thermal shielding (Kannana et al, 2006;Janowski & Pielichowski, 2008;Spoljaric & Shanks, 2012;Carmo et al, 2014;Liu et al, 2015;Pagacz et al, 2018;Szolyga et al, 2018;Zaharescu et al, 2018), hydrogel formation (Mather et al, 2006;Wu et al, 2010), drug-releasing stent coatings (Guo et al, 2009;Huitron-Rattinger et al, 2013) and thin-film applications (Oaten & Choudhury, 2005;Madbouly & Otaigbe, 2009;Blattmann & Mulhaupt, 2016) as it was incorporated in polyurethane networks. Recent advancements in HNT-polyurethane systems have also been postulated in several studies and reviews in which the polyurethane matrix was given specific properties including: shape memory (Bouaziz et al, 2019), corrosion resistance in protective coatings (Zahidah et al, 2017;Zeng et al, 2019), drug delivery (Hanif et al, 2016;Fizir et al, 2018), removal of pollutants from water (Anastopoulos et al, 2018;Papoulis, 2019) and thermal stability + fire-proofing (Tang et al, 2008; Smith et al, 2018).…”