Characteristics of Biodegradable Polylactide/Thermoplastic Starch/Nanosilica Composites: Effects of Plasticizer and Nanosilica Functionality

The effect of plasticizer (polydimethylsiloxanol) and neat (SiO2) or modified (having amine functional groups) silica (A-SiO2) on morphology, thermal, mechanical, and rheological properties of PLA/TPS blends compatibilized by maleated PLA (MPLA) was investigated. Toughened PLA/MPLA/TPS (60/10/30) bl...

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Bibliographic Details
Published in:Advances in materials science and engineering 2018-01, Vol.2018 (2018), p.1-15
Main Authors: Lukomska, Aneta, Spasowka, Ewa, Szadkowska, Agnieszka, Jeziorska, Regina, Chmielarek, Michal
Format: Article
Language:English
Subjects:
Biodegradability
Biodegradable materials
Biodegradation
Crystallization
Elongation
Functional groups
Glycerol
Impact strength
Low density polyethylenes
Mechanical properties
Morphology
Nanocomposites
Polyethylene
Polymer matrix composites
Polymers
Rheological properties
Rheology
Science
Silicon dioxide
Stability analysis
Thermal stability
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Summary:The effect of plasticizer (polydimethylsiloxanol) and neat (SiO2) or modified (having amine functional groups) silica (A-SiO2) on morphology, thermal, mechanical, and rheological properties of PLA/TPS blends compatibilized by maleated PLA (MPLA) was investigated. Toughened PLA/MPLA/TPS (60/10/30) blend containing 3 wt.% of plasticizer and various contents (1, 3, or 5 wt.%) of silica were prepared in a corotating twin-screw extruder. From SEM, it is clear that plasticized PLA/MPLA/TPS blend continuous porous structure is highly related to the silica content and its functionality. The results indicate that polydimethylsiloxanol enhances ductility and the initial thermal stability of the plasticized blend. DSC and DMTA analyses show that nucleation ability and reinforcing effect of A-SiO2 on plasticized blend crystallization are much better than those of SiO2. Silica practically had no effect on the thermo-oxidative degradation. However, the composites with A-SiO2 had better thermal stability than those with SiO2. Moreover, silica significantly improved the elongation at break.
ISSN:1687-8434
1687-8442
DOI:10.1155/2018/4571368