Mechanical Properties and Morphology of Poly(l-Lactic acid)/Nano-CaCO3 Composites

The tensile and impact properties of poly( l -lactic acid) composites filled with nanometer calcium carbonate (nano-CaCO 3 ) were measured at room temperature. The results showed that the tensile elastic modulus increased roughly linearly while the tensile yield strength, tensile fracture strength a...

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Published in:Journal of polymers and the environment 2015-03, Vol.23 (1), p.21-29
Main Authors: Liang, J. Z., Duan, D. R., Tang, C. Y., Tsui, C. P., Chen, D. Z., Zhang, S. D.
Format: Article
Language:English
Subjects:
Biopolymers
Calcium carbonate
Chemistry
Chemistry and Materials Science
Composite materials
Environmental Chemistry
Environmental Engineering/Biotechnology
Industrial Chemistry/Chemical Engineering
Materials Science
Mechanical properties
Morphology
Original Paper
Polymer Sciences
Tensile strength
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container_title Journal of polymers and the environment
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creator Liang, J. Z.
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description The tensile and impact properties of poly( l -lactic acid) composites filled with nanometer calcium carbonate (nano-CaCO 3 ) were measured at room temperature. The results showed that the tensile elastic modulus increased roughly linearly while the tensile yield strength, tensile fracture strength and tensile elongation at break ( δ b ) decreased nonlinearly with increasing the nano-CaCO 3 weight fraction ( W f ); when W f was constant, the δ b increased with increasing tensile rates. Both the V-notched Izod impact strength and V-notched Charpy impact strength showed the non-linear increase with increasing W f . The impact fracture surface was observed by means of a scanning electronic microscope to understand the toughening mechanisms.
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subjects Biopolymers
Calcium carbonate
Chemistry
Chemistry and Materials Science
Composite materials
Environmental Chemistry
Environmental Engineering/Biotechnology
Industrial Chemistry/Chemical Engineering
Materials Science
Mechanical properties
Morphology
Original Paper
Polymer Sciences
Tensile strength
title Mechanical Properties and Morphology of Poly(l-Lactic acid)/Nano-CaCO3 Composites
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