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Effect of Mixing Process on the Fracture Behavior of HA/PLLA Composite Material

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Abstract:

Effect of mixing process on the fracture behavior of HA/PLLA Composites were investigated. Fracture toughness values of HA/PLLA composites prepared under different mixing time and rotor speed were measured. The fracture surface morphology was also examined by scanning electron microscopy. It was found that the fracture toughness of HA/PLLA composite decreases due to decrease of ductile deformation of PLLA matrix and debonding of interfaces with increase of the rotor speed and mixing time. Effect of mixing process on neat PLLA was also assessed, and it was found that the fracture toughness of PLLA decreases due to such pocess. Disappearance of multiple craze formation and thermal degradation were found to be the primary mechanisms of the toughness degradation.

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Periodical:

Key Engineering Materials (Volumes 297-300)

Pages:

2453-2458

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.297-300.2453

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Online since:

November 2005

Authors:

Sang Dae Park, Mitsugu Todo, Kazuo Arakawa, Yasuharu Takenoshita

Keywords:

Bioabsorbable Composites, Melt-Mixing, Mode I Fracture Toughness, Poly(lactic acid) (PLA)

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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