Paper Number
BC17
Session
Blends, Composites and Multiphase Systems
Title
Morphological stability of PLA/PBAT and PLA/PBSA blends under shear flow
Presentation Date and Time
October 7, 2014 (Tuesday) 4:25
Track / Room
Track 5 / Washington B
Authors
- Nofar, Mohammadreza (Ecole Polytechnique de Montreal, Chemical Engineering Department)
- Maani, Amirhossein (Ecole Polytechnique de Montreal, Chemical Engineering Department)
- Heuzey, Marie-Claude (École Polytechnique de Montréal, Chemical Engineering)
- Carreau, Pierre J. (École Polytechnique de Montréal, Chemical Engineering)
Author and Affiliation Lines
Mohammadreza Nofar, Amirhossein Maani, Marie-Claude Heuzey, and Pierre J. Carreau
Chemical Engineering, École Polytechnique de Montréal, Montréal, Canada
Speaker / Presenter
Nofar, Mohammadreza
Text of Abstract
Blends of 75 wt% amorphous polylactide (PLA) with 25 wt% poly[(butylene succinate)-co-adipate] (PBSA) and poly[(butylene adipate)-co-terphthalate] (PBAT) were separately prepared using an internal batch mixer. The interfacial and viscoelastic properties of these two blends were analyzed and compared with each other. The morphology of the blends was examined after applying annealing and various shear flows. It was shown that annealing up to 20 min did not cause any pronounced morphology changes, nor subsequent modification of the viscoelastic behavior of both blends. However, shearing at 0.05 s-1 for 20 min induced significant droplet coalescence in both blends, while the changes in the viscoelastic response were more prominent in the PLA/PBSA blend. It was also shown that although shearing at 0.2 s-1 for 10 and 20 min caused noticeable droplet coalescence, it did not cause a pronounced change in the viscoelastic behavior of both blends. Moreover, the Palierne model was used to calculate the interfacial tensions between the blend components. It was also utilized to predict the droplet size of the dispersed phase after applying shearing at various rates and times.