Evaluation of dynamic compressive properties of PLA polymer blends using split Hopkinson pressure bar

M. Nishida; M. Yamaguchi; M. Todo; T. Takayama; H.-Å. Häggblad; P. Jonsén

doi:doi:10.1051/dymat/2009127

All issues

Volume 1 (2009)

10.1051/dymat/2009127

Abstract

Issue		DYMAT 2009 Volume 1, 2009 DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading


Page(s)		909 - 915
Section		Bio-Mechanics
DOI		https://doi.org/10.1051/dymat/2009127
Published online		15 September 2009

DYMAT 2009 (2009) 909-915
DOI: 10.1051/dymat/2009127

Evaluation of dynamic compressive properties of PLA polymer blends using split Hopkinson pressure bar

M. Nishida¹, M. Yamaguchi¹, M. Todo², T. Takayama², H.-Å. Häggblad³ and P. Jonsén³

¹ Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Japan
² Kyushu University, 6-1, Kasuga-koen, Kasuga, Fukuoka, Japan
³ Luleå University of Technology, 97187 Luleå, Sweden

Published online: 15 September 2009

Abstract
Poly(lactic acid) (PLA) has been used as a biomaterial for bone fixation devices in oral and orthopedic surgery because of good biocompatibility and bioabsorbability. Because Poly(ε-Caprolactone) (PCL) is a ductile, bioabsorbable and biodegradable polymer, many types of PLA/PCL polymer blends have been developed to improve its material strength and impact resistance. The stress-strain curves of PLA and PLA/PCL polymer blends were measured using a split Hopkinson pressure bar (Kolsky bar) method and a universal testing machine. The effect of PCL content on Young's modulus and yield stress was examined. The values of constants in Cowper-Symonds equation with respect to yield stress were determined for PLA and PLA/PCL polymer blend specimens. PLA/PCL specimens were observed using a scanning electron microscope.