[article]
| Titre : |
Preparation, characterization and processing of PCL/PHO blends by 3D bioplotting |
| Type de document : |
texte imprimé |
| Auteurs : |
S. Gopi, Auteur ; B. A. Ramsay, Auteur ; J. A. Ramsay, Auteur ; M. Kontopoulou, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 458-470 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
Blends of polycaprolactone (PCL) and poly(3-hydroxyoctanoate) P(3HO) were prepared by melt compounding. These immiscible blends exhibited droplet-matrix morphology at compositions up to 30 wt% P(3HO). Even though the addition of amorphous P(3HO) decreased the crystallinity of PCL, the crystallization temperature of the blends increased by 6 to 7 °C. Blends containing up to 30 wt% P(3HO) had higher crystallization rates, and lower crystallization half-times compared to neat PCL. The viscosity of PCL decreased upon addition of P(3HO), making the blends suitable for processing using a 3D bioplotter. Compositions with 10 to 30 wt% P(3HO) were ideal for processing, because of their improved crystallization kinetics, reduced stickiness and good flow properties. Estimation of the interfacial tension by fitting the Palierne model to the linear viscoelastic properties of the blends revealed good compatibility, which gave rise to synergistic effects in the thermal and mechanical properties. The fibres prepared by 3D bioplotting maintained droplet matrix morphology, with finer particle size than the original compounded material. In addition to favourable viscosity and thermal properties, the extruded fibres containing 30 wt% P(3HO) had comparable modulus to the neat PCL, while exhibiting good ductility. These blends may be suitable alternatives to PCL for biomedical applications, because they provide a range of crystallinities, crystallization rates and viscosities. |
| Note de contenu : |
- EXPERIMENTAL : Materials and compounding - Melt compounding - Fabrication of 3D fibres of PCL/P(3HO) blends - Characterization
- RESULTS : PCL/P(3HO) blend morphology - PCL/P(3HO) blend rheology - Interfacial tension of the PCL/P(3HO) blend - Thermal properties of PCL/P(3HO) blends - Properties of 3D bioplotted PCL/P(3HO) blend fibres |
| DOI : |
https://doi.org/10.3139/217.3971 |
| En ligne : |
https://drive.google.com/file/d/1AbKu7Eh831d7T0lubOmHr5ggh31zNFsG/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35068 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXV, N° 5 (11/2020) . - p. 458-470
[article]
|
Aller sur edunet
Accueil
Ajouter le résultat dans votre panier Affiner la recherchePreparation, characterization and processing of PCL/PHO blends by 3D bioplotting / S. Gopi in INTERNATIONAL POLYMER PROCESSING, Vol. XXXV, N° 5 (11/2020)
