Abstract
Hydroxyapatite particle filled poly(L-lactic acid)/poly(ε- caprolactone) blend (HA/PLLA/PCL) composite materials were developed by melt-mixing, and their bending mechanical properties and fracture toughness were examined. It was found that the fracture absorbed energy and fracture toughness are maximized with the PCL content of 5wt%. Local plastic deformation of PLLA/PCL matrix is the main mechanism of energy dissipation during fracture. This ductile deformation is considered to be initiated in the surroundings of voids formed due to interfacial debonding at HA/matrix interfaces and phase separation of PLLA and PCL. On the other hand, fracture toughness of HA/PLLA/PCL with the PCL contents of 10 and 15wt% becomes lower than that of HA/PLLA. In these composites, void formation causes severe local stress concentration and therefore degrades the materials rather than improving the fracture resistance.
| Original language | English |
|---|---|
| Article number | 132 |
| Pages (from-to) | 838-843 |
| Number of pages | 6 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 5852 PART II |
| DOIs | |
| Publication status | Published - 2005 |
| Event | Third International Conference on Experimental Mechanics and Third Conference of the Asian Committee on Experimental Mechanics - Singapore, Singapore Duration: Nov 29 2004 → Dec 1 2004 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering