Correlating the morphology of poly(L-lactide)/poly(butylene succinate)/graphene oxide blends nanocomposites with their crystallization behavior

Correlating the morphology of poly(L-lactide)/poly(butylene succinate)/graphene oxide blends nanocomposites with their crystallization behavior

Bio-based blend nanocomposites of poly(L-lactic acid) (PLLA) and poly(butylene succinate) (PBS), with different concentrations (from 0.1 to 0.5 wt%) of graphene oxide (GO), are prepared via solution dispersion of PBS/GO followed by melt blending with PLLA in a 70/30 PLLA/PBS weight ratio. Scanning a...

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Bibliographic Details
Published in:Express polymer letters Vol. 12; no. 1; pp. 58 - 70
Main Authors: Fenni, S. E., Monticelli, O., Conzatti, L., Doufnoune, R., Stagnaro, P., Haddaoui, N., Cavallo, D.
Format: Journal Article
Language:English
Published: Budapest Budapest University of Technology and Economics, Faculty of Mechanical Engineering, Department of Polymer Engineering 2018
Budapest University of Technology
Subjects:
Biodegradable materials
Chemistry
Crystallization
Efficiency
Engineering
Graphene
Investigations
Mechanical properties
Melt blending
Morphology
Nanocomposites
Nanoparticles
Physics
Polylactic acid
Polymer blends
Polymer blends and alloys
polymer crystallization
Polymers
Scanning electron microscopy
Science
Silicon nitride
Transmission electron microscopy
Zinc oxides
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Summary:Bio-based blend nanocomposites of poly(L-lactic acid) (PLLA) and poly(butylene succinate) (PBS), with different concentrations (from 0.1 to 0.5 wt%) of graphene oxide (GO), are prepared via solution dispersion of PBS/GO followed by melt blending with PLLA in a 70/30 PLLA/PBS weight ratio. Scanning and Transmission Electron Microscopy reveals micron-sized droplets of PBS in the PLLA matrix with the GO nanofiller preferentially found in the PBS phase. The GO acts as nucleating agent for both semicrystalline polymers. The nanofiller nucleating effect is compared to the one of own self-nuclei for each polymer, to define a convenient nucleating efficiency (NE) scale. A value of around 80% is determined for GO towards PBS, among the highest NEs ever reported for this polymer. On the other hand, the efficiency in nucleating PLLA is equal to a modest 15%, also due to the uneven distribution of the nanofiller in the two polymers. A close relationship between the nanocomposite morphology and crystallization behavior of the two different polymers is thus established.
ISSN:1788-618X
1788-618X
DOI:10.3144/expresspolymlett.2018.5