Effect of nitroxyl-based radicals on the melt radical grafting of maleic anhydride onto polyethylene in presence of a peroxide

Interface design of environmentally friendly carbon nanotube-filled polyester composites: Fabrication, characterisation, functionality and application

“…Three peaks were observed that corresponded to carbon atoms in the unmodified PHA (1, 6: δ = 169.2; 2: δ = 38.7; 3: δ = 71.8; 4: δ = 26.7; 5: δ = 9.5; 7: δ = 40.7; 8: δ = 67.6; 9: δ = 19.8 ppm) [37]. The 13 C-NMR spectrum of PHA-g-MA showed additional peaks (11: δ = 36.3; 10: δ = 42.3; 12: δ = 172.1 ppm), thereby confirming that MA was covalently grafted onto the PHA [38].…”

Modulation, functionality, and cytocompatibility of three-dimensional printing materials made from chitosan-based polysaccharide composites

“…Three peaks were observed corresponding to carbon atoms in the unmodified PLA (1: δ = 16.9; 2: δ = 68.8; 3: δ = 169.6 ppm) [23]. The 13 C NMR spectrum of PLA-g-MA showed additional peaks (4: δ = 36.6; 5: δ = 41.8; 6: δ = 171.6 ppm), thereby confirming that MA was covalently grafted onto the PLA [24,25].…”

Post‐polymerization modification by nitroxide radical coupling

“…The NRC reaction of TEMPO or 2,2‐diphenyl‐3‐phenylimino‐2,3‐dihydroindol‐1‐yloxyl nitroxide (DPAIO) (Table ) on low density PE using 2,5‐di( tert ‐butylperoxy)‐2,5‐dimethylhexane (DTBH) as peroxide initiator at 160 °C was reported by Belekian et al . Interestingly, when TEMPO was used, the functionalization degree and control of the molecular weight of PE was similar to that reported by Cicogna et al .…”

“…This implies a decrease in the number of propagating radicals leading to a lower degradation of PP (the molecular weight is preserved), but also to a limited grafting of MA. Also the functionalization of PE with MA in the presence of TEMPO and DPAIO was reported . When the experiment was carried out in the presence of MA and TEMPO ([TEMPO]/[DTBH] = 2), a reduction of the grafting amount of both TEMPO and MA with respect to the corresponding blank experiments was observed and justified with a competition between TEMPO and MA for the same grafting sites.…”