Abstract
The effect of lysine tri-isocyanate (LTI) addition on the microstructure and the mechanical properties of hydroxyapatite/Poly(L-lactide) (HA/PLLA) composites was studied. HA particles with the size of 5μm were used as filler and HA and PLLA pellets were mixed by the melt-mixer at 190°C. It is found that the crystallinity of PLLA decreases by LTI addition, showing that the crystallization is hindered by crosslinking of PLLA molecules. The maximum load and the corresponding displacement of HA/PLLA/LTI is greater than those of HA/PLLA, indicating the effectiveness of LTI addition for bending m,mechanical behavior. The fracture surface of HA/PLLA is characterized by rough surface with voids that are formed by debonding HA particles from PLLA matrix. The results also show that in HA/PLLA/LTI, PLLA molecular bundles are firmly connected into the surface of the HA particle.
Original language | English |
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Pages (from-to) | 5017-5020 |
Number of pages | 4 |
Journal | Journal of Materials Science |
Volume | 44 |
Issue number | 18 |
DOIs | |
Publication status | Published - Sep 1 2009 |
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering