Abstract
Tricalcium phosphate/poly(lactic acid) (TCP/PLA) composite is attracted the attention as a material of bone fixation device because it doesn’t require removal by reoperation after healing bone fracture. However, mechanical properties of TCP/PLA composite were low. In this study, effect of draw ratio (DR) on mechanical properties of drawn TCP/PLA composite was investigated to improve the mechanical properties. Orientation function of drawn TCP/PLA composite was investigated to clarify mechanism of changing mechanical properties by drawing. As a result, tensile strength was improved with draw ratio up to DR 2.5. Tensile strengths of drawn TCP/PLA composite up to DR 2.5 were higher than that of PLA. Elastic modulus was improved with draw ratio up to 2.0. Orientation function of α form crystal was improved with draw ratio up to 2.0. From these results, it was suggested that increase mechanical properties of drawn TCP/PLA composite due to orientation of α form crystals.
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