RT Journal Article
T1 Morphology and mechanical properties of poly(ethylene brassylate)/cellulose nanocrystal composites
A1 Butron, Amaia
A1 Llorente, Olatz
A1 Fernandez, Jorge
A1 Meaurio, Emilio
A1 Sarasua, Jose Ramon
AB Poly(ethylene brassylate), a novel inexpensive biodegradable polyester, has been reinforced with cellulose nanocrystals (CNCs) with the aim of improving its thermal stability and mechanical properties. The composites have been characterized through calorimetry, tensile tests, thermogravimetry and electron microscopy. The addition of small amounts of CNCs improves both the stiffness and the ductility of the composites, suggesting the existence of some compatibilizing effect. Adding large CNC amounts increases the Young modulus (e.g., 150% for 50 wt% CNCs), but now the material shows brittle behavior. Degradation of the CNCs starts at lower temperature suggesting mutual reactivity. The SEM analysis of the composites with ductile behavior reveals the formation of a percolating network crossing through the interconnected domains that conform a PEB-rich continuous phase. Processing consisting on reinforcement dispersion by sonication followed by melt processing results in composites in which the improvement of mechanical properties does not involve any trade-off.
SN 0144-8617
YR 2019
FD 2019-10-01
LK https://hdl.handle.net/11556/3013
UL https://hdl.handle.net/11556/3013
LA eng
NO Butron , A , Llorente , O , Fernandez , J , Meaurio , E & Sarasua , J R 2019 , ' Morphology and mechanical properties of poly(ethylene brassylate)/cellulose nanocrystal composites ' , Carbohydrate Polymers , vol. 221 , pp. 137-145 . https://doi.org/10.1016/j.carbpol.2019.05.091
NO Publisher Copyright: © 2019 Elsevier Ltd
NO The authors are thankful for funds from the Basque Government, Department of Education ( IT-927-16 ) and from the Spanish Ministry of Innovation and Competitiveness MINECO ( MAT2016-78527-P ).
DS TECNALIA Publications
RD 30 jul 2024