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

Journal of Polymers and the Environment

pp 1–10

• Authors
• Authors and affiliations

• Jyh-Horng Wu
• Chien-Wen Chen
• M. C. KuoEmail author
• Ming-Shien Yen
• Kung-Yu Lee

1. 1.
2. 2.

Original Paper

First Online: 

04 March 2017

DOI: 10.1007/s10924-017-0977-6

Cite this article as: 

Wu, JH., Chen, CW., Kuo, M.C. et al. J Polym Environ (2017). doi:10.1007/s10924-017-0977-6

Abstract

A poly(lactic acid) (PLA)/polyamide 11 (PA11)/SiO2 composite was mixed from PLA, PA11, and nanosilica particles through twin-screw extrusion. The PLA/PA11/SiO2 composite was evaluated with tensile and Izod impact tests, light transmission and haze measurement, and isothermal and nonisothermal crystallization behavior determinations. The PLA/PA11/SiO2 (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/SiO2 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/m2. 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.

Keywords

Poly(lactic acid)PA11NanosilicaTougheningIsothermal crystallizationNon-isothermal crystallization

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