Biobased dynamic polymer networks derived from castor oil and anhydrous piperazine

Carbon nanotube reinforced biobased poly(urethane urea) covalent adaptable network composite

“…The E a of the PPU/CNT composites was calculated from the slope to be in the range of 85.43-103.6 kJ/mol, which is equivalent to other polyurethanes with dynamic ureabased bonds. 42,47 There is a uptrend of the E a with increasing CNT content, which was reasonable because more CNT could restrict the segment mobility of the PPU matrix more severely to hamper the exchange reaction of the dynamic piperidine-urea bonds.…”

Castor oil-derived polyurethane networks multiple recyclability based on reversible dynamic acetal bond

“…5,6 However, the recyclability of polyurethanes made from vegetable oil is being investigated by many researchers. 7,8 Thermoset polyurethane substances have been widely utilized in a wide range of applications, such as the aviation industry, 9 tissue regeneration, 10 electronic component production, 11 and automobile industries, 12 because of their excellent mechanical characteristics, 13 high density of cross-links, 14 superb heat resistance, 15 solvent and creep stability, 16 and malleability. 17 Polyurethane's various uses have led to resource wastage and environmental damage because of the rigidity of its structures.…”

“…5,6 However, the recyclability of polyurethanes made from vegetable oil is being investigated by many researchers. 7,8…”

Dynamic poly(hindered urea) hybrid network materials crosslinked with reactive methacrylate polymer

“…Typical examples include aliphatic N,N′-di-t-butylethane-1,2-diamine reacting with various triols [26][27][28] and triisocyanates, [29][30][31][32] 2-t-butylaminoethanol reacting with triisocynates, 33,34 and aromatic N,N′-di-t-butyl-p-xylylenediamine reacting with a triol. 35 Along with the t-butylamino group, piperazine [36][37][38][39][40] and pyrazole groups [41][42][43] have also been explored to fabricate dynamic poly(urethane-urea) networks.…”