TY - JOUR
T1 - The effect of bimodal distribution on the mechanical properties of hydroxyapatite particle filled poly(L-lactide) composites
AU - Takayama, Tetsuo
AU - Todo, Mitsugu
AU - Takano, Atsushi
PY - 2009/1
Y1 - 2009/1
N2 - The effects of a bimodal distribution of micro-HA and nano-HA particles on the mechanical properties such as bending strength, modulus and mode I fracture energy of HA/PLLA composites were investigated. The bending properties were effectively improved by a bimodal distribution compared to a monomodal distribution. It is considered that in the bimodal HA/PLLA, the PLLA molecular chains are constrained by the existence of well distributed nano-particles, resulting in the reduction of the deformation of molecular chains. The mode I fracture energy was also effectively improved by a bimodal distribution with additional energy dissipation mechanisms, that is, dense ductile deformation of the PLLA matrix and debonding of the particle/matrix interfaces in the crack-tip region.
AB - The effects of a bimodal distribution of micro-HA and nano-HA particles on the mechanical properties such as bending strength, modulus and mode I fracture energy of HA/PLLA composites were investigated. The bending properties were effectively improved by a bimodal distribution compared to a monomodal distribution. It is considered that in the bimodal HA/PLLA, the PLLA molecular chains are constrained by the existence of well distributed nano-particles, resulting in the reduction of the deformation of molecular chains. The mode I fracture energy was also effectively improved by a bimodal distribution with additional energy dissipation mechanisms, that is, dense ductile deformation of the PLLA matrix and debonding of the particle/matrix interfaces in the crack-tip region.
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U2 - 10.1016/j.jmbbm.2008.06.001
DO - 10.1016/j.jmbbm.2008.06.001
M3 - Article
C2 - 19627812
AN - SCOPUS:55249109383
SN - 1751-6161
VL - 2
SP - 105
EP - 112
JO - Journal of the Mechanical Behavior of Biomedical Materials
JF - Journal of the Mechanical Behavior of Biomedical Materials
IS - 1
ER -