TY - GEN
T1 - Thermal characterization of biodegradable poly (lactic acid)/clay nanocomposites
AU - Krishnamachari, Parakalan
AU - Zhang, Jian
AU - Yan, Jizhong
AU - Shahbazi, Abolghasem
AU - Uitenham, Leonard
AU - Lou, Jianzhong
PY - 2009
Y1 - 2009
N2 - Aliphatic polyesters such as polylactides have various applications due to their biodegradable and/or biocompatible character. Poly (L-lactide) is produced from L-lactic acid, which is derived itself from the fermentation of corn or sugar beet. PLA with a glass transition temperature around 55 °C is a relatively stiff and brittle polymer with low deformation at break. Polymer nanocomposites have been a subject of a large number of research studies in the last decade. However, to commercialize polymer nanocomposites (especially bio-degradable polymer nanocomposite) there are still a number of technical barriers. Polymer nanocomposites based on initially biodegradable Poly (lactic acid) (PLA) and organically modified layered silicates were prepared by melt processing using a Brabender twin screw mixer. Several organically modified montmorillonite (Nanoclay) were incorporated at 1% loading level into the PLA. However, a completely exfoliated morphology has been evidenced by X-ray diffraction analysis for the combination of PLA and the natural montmorillonite modified with a quaternary ammonium salt, Cloisite R 30B, this is the most hydrophilic among the organically modified montmorillonite. Further studies were done on the same combination with loading levels of 1%, 2%, 3%, 4% and 5%. Thermal stability of the Nanocomposites was studied using TGA. An increase in thermal stability with the clay content is observed by TGA with a maximum obtained for a loading of 3 wt% of 30B nanoclay. Glass transition and melting point data were collected and analyzed using DSC. The onset of Tg has been increased by the addition of the 30B nanoclay. © Springer Science+Business Media, LLC 2009.
AB - Aliphatic polyesters such as polylactides have various applications due to their biodegradable and/or biocompatible character. Poly (L-lactide) is produced from L-lactic acid, which is derived itself from the fermentation of corn or sugar beet. PLA with a glass transition temperature around 55 °C is a relatively stiff and brittle polymer with low deformation at break. Polymer nanocomposites have been a subject of a large number of research studies in the last decade. However, to commercialize polymer nanocomposites (especially bio-degradable polymer nanocomposite) there are still a number of technical barriers. Polymer nanocomposites based on initially biodegradable Poly (lactic acid) (PLA) and organically modified layered silicates were prepared by melt processing using a Brabender twin screw mixer. Several organically modified montmorillonite (Nanoclay) were incorporated at 1% loading level into the PLA. However, a completely exfoliated morphology has been evidenced by X-ray diffraction analysis for the combination of PLA and the natural montmorillonite modified with a quaternary ammonium salt, Cloisite R 30B, this is the most hydrophilic among the organically modified montmorillonite. Further studies were done on the same combination with loading levels of 1%, 2%, 3%, 4% and 5%. Thermal stability of the Nanocomposites was studied using TGA. An increase in thermal stability with the clay content is observed by TGA with a maximum obtained for a loading of 3 wt% of 30B nanoclay. Glass transition and melting point data were collected and analyzed using DSC. The onset of Tg has been increased by the addition of the 30B nanoclay. © Springer Science+Business Media, LLC 2009.
UR - https://dx.doi.org/10.1007/978-0-387-88483-7_29
U2 - 10.1007/978-0-387-88483-7_29
DO - 10.1007/978-0-387-88483-7_29
M3 - Conference contribution
BT - 2007 3rd National Conference on Environmental Science and Technology
ER -