High Toughness and Fast Crystallization Poly(Lactic Acid)/Polyamide 11/SiO2 Composites

A poly(lactic acid) (PLA)/polyamide 11 (PA11)/SiO 2 composite was mixed from PLA, PA11, and nanosilica particles through twin-screw extrusion. The PLA/PA11/SiO 2 composite was evaluated with tensile and Izod impact tests, light transmission and haze measurement, and isothermal and nonisothermal crys...

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Bibliographic Details
Published in:Journal of polymers and the environment 2018-02, Vol.26 (2), p.626-635
Main Authors: Wu, Jyh-Horng, Chen, Chien-Wen, Kuo, M. C., Yen, Ming-Shien, Lee, Kung-Yu
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Crystallization
Dimpling
Ductility
Elongation
Environmental Chemistry
Environmental Engineering/Biotechnology
Extrusion
Fracture toughness
Haze
Impact strength
Impact tests
Industrial Chemistry/Chemical Engineering
Light transmission
Materials Science
Original Paper
Polyamides
Polylactic acid
Polymer matrix composites
Polymer Sciences
Polymers
Silicon dioxide
Ultimate tensile strength
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Summary:A poly(lactic acid) (PLA)/polyamide 11 (PA11)/SiO 2 composite was mixed from PLA, PA11, and nanosilica particles through twin-screw extrusion. The PLA/PA11/SiO 2 composite was evaluated with tensile and Izod impact tests, light transmission and haze measurement, and isothermal and nonisothermal crystallization behavior determinations. The PLA/PA11/SiO 2 (97.0/3.0) composite had approximately 10.8% less ultimate tensile strength than neat PLA, but it had greater ductility and approximately ninefold greater elongation at break. A dimple morphology was observed on the fractural surface of the PLA/PA11/SiO 2 composite, indicating that the incorporation of PA11 and nanosilica particles increased the ductility of the PLA matrix. PLA with less than 3 wt% of PA11 and 0.5 phr of nanosilica particles had an Izod impact strength of 8.72 kJ/m 2 . PA11 and nanosilica particles effectively toughened this PLA polymer; they accelerated both isothermal and nonisothermal crystallization rates and increased the crystallinities of the resulting composites under isothermal and nonisothermal crystallization processes.
ISSN:1566-2543
1572-8919
1572-8900
DOI:10.1007/s10924-017-0977-6