Journal of Materials Science

, Volume 46, Issue 24, pp 7850–7857 | Cite as

Compressive mechanical properties and deformation behavior of porous polymer blends of poly(ε-caprolactone) and poly(l-lactic acid)

  • Joo-Eon Park
  • Mitsugu TodoEmail author


Porous biodegradable polymeric scaffolds are developed by physically blending two different kinds of biodegradable polymers, PCL, and PLLA, for application in tissue engineering. The main objective of the development of this material is to control the mechanical properties, such as, elastic modulus and strength. The results from mechanical testing showed that the compressive mechanical properties of PCL/PLLA scaffold can be varied by changing the blend ratio. It also showed that these properties can be well predicted by the rule of mixture. The primary deformation mechanism of the scaffolds was found to be localized buckling of struts surrounding the pores. Localized ductile failure caused by PCL phase tends to be suppressed with increasing PLLA content. The immiscibility of PCL and PLLA caused the phase-separation morphology that strongly affected the macroscopic mechanical properties and the microscopic deformation behavior.


Compressive Strength PLLA Differential Scanning Calorimeter Analysis Pure PLLA Initial Elastic Modulus 


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Interdisciplinary Graduate School of Engineering SciencesKyushu UniversityKasugaJapan
  2. 2.Research Institute for Applied MechanicsKyushu UniversityKasugaJapan

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