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Mechanical Behaviour of Interpenetrating Co-Continuous β-TCP-PDLLA Composites

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Abstract:

Co-continuous degradable polymer-ceramic composites were produced via in-situ polymerization of (D,L-lactic)acid monomer within a porous β-tricalcium phosphate matrix. The mechanical properties of both the composite and the unfilled porous ceramic were investigated with compressive testing. The average stress to failure increased from 1.3±0.1 MPa for the unfilled ceramic matrix to 82±2 MPa for the composite. The Young’s modulus increased from approximately 20 MPa to 700±42 MPa. A combination of X-ray micro-tomography and mechanical testing provided insight into the failure mechanisms of the composite. Stress may be deflected by crack bridging around the polymer phase leading to debonding of the polymer along the crack lines.

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Periodical:

Key Engineering Materials (Volumes 361-363)

Pages:

407-410

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.361-363.407

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Online since:

November 2007

Authors:

Lisa M. Ehrenfried, David Farrar, David Morsley, Ruth Cameron

Keywords:

Biodegradable Polymer, Co-Continuous Composite, Compressive Strength, Mechanical Behavior, Porous Ceramics, X-Ray Microtomography

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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