Title:Shape Memory Behaviour of Functionalised Poly(ε-caprolactone) Crosslinked by Hexamethylene-Diisocyanate
Volume: 16
Issue: 22
Author(s): Giovanna Gomez d’Ayala, Paola Laurienzo, Mario Malinconico, Maria Rossella Nobile, Diletta Pantalena and Roberto Russo
Affiliation:
Keywords:
Shape memory effect, poly(ε-caprolactone), crosslinking
Abstract: In this study, the shape memory behaviour of poly(ε-caprolactone) (PCL) with different crosslinking degrees was investigated.
PCL was first functionalised with maleic anhydride (MA) and glycidyl methacrylate (GMA), and successively chemically crosslinked by
hexamethylene diisocianate (HMDI). The crosslinking reaction was studied through with a rotational stress rheometer, while the shape
memory behaviour was analyzed with cyclic thermomechanical experiments and optical microscopy. The results show that the new materials
exhibit good shape memory behaviour and good stability of the shape recovery under consecutive cycles in the range 55 - 70°C, can
reach high level of stretching, and are furthermore characterised by high recovery speed. These results are promising for potential practical
applications, as biomaterials for embolic devices in minimally invasive surgery.
