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 |
|---|---|
| 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 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
Cite this
Improvement of mechanical properties of hydroxyapatite particle-filled poly(l-lactide) biocomposites using lysine tri-isocyanate. / Takayama, Tetsuo; Todo, Mitsugu.
In: Journal of Materials Science, Vol. 44, No. 18, 01.09.2009, p. 5017-5020.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Improvement of mechanical properties of hydroxyapatite particle-filled poly(l-lactide) biocomposites using lysine tri-isocyanate
AU - Takayama, Tetsuo
AU - Todo, Mitsugu
PY - 2009/9/1
Y1 - 2009/9/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=68349141523&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=68349141523&partnerID=8YFLogxK
U2 - 10.1007/s10853-009-3782-3
DO - 10.1007/s10853-009-3782-3
M3 - Article
AN - SCOPUS:68349141523
VL - 44
SP - 5017
EP - 5020
JO - Journal of Materials Science
JF - Journal of Materials Science
SN - 0022-2461
IS - 18
ER -