A series of crosslinked poly(ε-caprolactone) (PCL) materials were obtained starting from linear, three- and four-arm star PCL functionalized with methacrylate end-groups, allowing to tune the melting temp. (Tm) on a range between 36 and 55°C. After deforming the specimens at 50% above Tm, the materials are seen to fully restore their original shape by heating them on a narrow region close to Tm; further, when the shape memory effect is triggered under fixed strain conditions, the materials are able to exert stress on a range between 0.2 and 7 MPa. The materials also display two-way shape memory features, reversibly moving between two shapes when cooled and heated under a fixed load. Finally, to investigate the application of the PCL materials as self-expandable stents, one-way shape memory expts. are currently carried out on tubular specimens.
Tailored One-Way and Two-Way Shape Memory Response of Poly(ε-Caprolactone)-Based Systems for Biomedical Applications / Stefano Pandini; Simone Passera; Theonis Riccò; Alberto Borboni; Ileana Bodini; David Vetturi; Luca Dassa; Danilo Cambiaghi; Katia Paderni; Micaela Degli Esposti; Maurizio Toselli; Francesco Pilati; Massimo Messori.. - STAMPA. - 77:(2013), pp. 313-318. [10.4028/www.scientific.net/AST.77.313]
Tailored One-Way and Two-Way Shape Memory Response of Poly(ε-Caprolactone)-Based Systems for Biomedical Applications
Micaela Degli Esposti;TOSELLI, MAURIZIO;
2013
Abstract
A series of crosslinked poly(ε-caprolactone) (PCL) materials were obtained starting from linear, three- and four-arm star PCL functionalized with methacrylate end-groups, allowing to tune the melting temp. (Tm) on a range between 36 and 55°C. After deforming the specimens at 50% above Tm, the materials are seen to fully restore their original shape by heating them on a narrow region close to Tm; further, when the shape memory effect is triggered under fixed strain conditions, the materials are able to exert stress on a range between 0.2 and 7 MPa. The materials also display two-way shape memory features, reversibly moving between two shapes when cooled and heated under a fixed load. Finally, to investigate the application of the PCL materials as self-expandable stents, one-way shape memory expts. are currently carried out on tubular specimens.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
