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

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Abstract

The tensile and impact properties of poly(l-lactic acid) composites filled with nanometer calcium carbonate (nano-CaCO3) 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-CaCO3 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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Acknowledgments

The authors would like to thank for the support from the Research Committee of the Hong Kong Polytechnic University (Project code: G-YK05).

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Authors and Affiliations

  1. Research Division of Green Function Materials and Equipment, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510640, People’s Republic of China

    J. Z. Liang, D. R. Duan & S. D. Zhang

  2. Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, People’s Republic of China

    C. Y. Tang & C. P. Tsui

  3. Department of Polymer Materials and Engineering, Shenzhen University, Shenzhen, People’s Republic of China

    D. Z. Chen

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  1. J. Z. Liang
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  2. D. R. Duan
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  3. C. Y. Tang
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  4. C. P. Tsui
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  5. D. Z. Chen
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  6. S. D. Zhang
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Correspondence to J. Z. Liang.

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Liang, J.Z., Duan, D.R., Tang, C.Y. et al. Mechanical Properties and Morphology of Poly(l-Lactic acid)/Nano-CaCO3 Composites. J Polym Environ 23, 21–29 (2015). https://doi.org/10.1007/s10924-014-0661-z

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  • DOI: https://doi.org/10.1007/s10924-014-0661-z

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