|
authors |
da Silva, SPM; Lima, PS; Oliveira, JM |
|
nationality |
International |
|
journal |
COMPOSITES PART B-ENGINEERING |
|
author keywords |
Polymer-matrix composites (PMCs); Thermoplastic resin; Rheological properties; Injection moulding |
|
keywords |
MECHANICAL-PROPERTIES; MOLECULAR-WEIGHT; POLYPROPYLENE; FLOW |
|
abstract |
The incorporation of cork in synthetic polymers has become an effective approach to develop new sustainable materials. Cork-polypropylene composites (CPC) filled with three different cork granulometries were studied. Rheological analyses were performed to assess the processability of these CPC and a set of experiments was conducted keeping the same matrix/cork weight ratio, varying the cork granulometric distribution. The effect of three different cork granulometries, temperature and the effect of a coupling agent, polypropylene graft maleic anhydride (PPgMA), were analysed. All composites exhibited non-Newtonian, pseudoplastic behaviour. Related to neat PP, cork incorporation led to a viscosity increase. This increase is more significant in the CPC with the lowest powder cork granulometry used. On the other side, the addition of PPgMA resulted on a decrease of CPC viscosity. The experimental results were fitted to Cross-WLF Model through a viscosity master curve obtained by the time-temperature superposition principle (TTSP). This study showed that cork can be considered on the development of sustainable materials for injection moulding technology. (C) 2016 Elsevier Ltd. All rights reserved. |
|
publisher |
ELSEVIER SCI LTD |
|
issn |
1359-8368 |
|
year published |
2016 |
|
volume |
90 |
|
beginning page |
172 |
|
ending page |
178 |
|
digital object identifier (doi) |
10.1016/j.compositesb.2015.12.015 |
|
web of science category |
Engineering, Multidisciplinary; Materials Science, Composites |
|
subject category |
Engineering; Materials Science |
|
unique article identifier |
WOS:000372559900018
|
