| Literature DB >> 19627812 |
Tetsuo Takayama1, Mitsugu Todo, Atsushi Takano.
Abstract
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.Entities:
Mesh：
Substances：
Year: 2008 PMID： 19627812 DOI： 10.1016/j.jmbbm.2008.06.001
Source DB: PubMed Journal: J Mech Behav Biomed Mater ISSN： 1878-0180