The effect of carbon black reinforcement on the dynamic fatigue and creep of polyisobutylene-based biomaterials.

Abstract

This paper investigates the structure-property relationship of a new generation of poly(styrene-b-isobutylene-b-styrene) (SIBS) block copolymers with a branched (dendritic) polyisobutylene core with poly(isobutylene-b-para-methylstyrene) end blocks (D_IBS), and their carbon black (CB) composites. These materials display thermoplastic elastomeric (TPE) properties, and are promising new biomaterials. It is shown that CB reinforced the block copolymer TPEs, effectively delayed the oxidative thermal degradation of the D_IBS materials, and greatly improved their dynamic fatigue performance. Specifically, the dynamic creep of a CB composite was comparable to that of chemically crosslinked and silica-reinforced medical grade silicone rubber, used as a benchmark biomaterial.

• Authors: C Götz, G T Lim, J E Puskas, V Altstädt
• Journal: Journal of the mechanical behavior of biomedical materials (J Mech Behav Biomed Mater) Vol. 39 Pg. 355-65 (Nov 2014) ISSN: 1878-0180 [Electronic] Netherlands
• PMID: 25173236 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, Non-P.H.S.)
• Copyright: Copyright © 2014 Elsevier Ltd. All rights reserved.

Chemical References

• Biocompatible Materials
• Cross-Linking Reagents
• Elastomers
• Silicone Elastomers
• Soot
• Styrenes
• poly(styrene-b-isobutylene-b-styrene)
• Oxygen

Topics

• Biocompatible Materials (chemistry)
• Cross-Linking Reagents (chemistry)
• Elasticity
• Elastomers
• Materials Testing
• Microscopy, Electron, Transmission
• Nanocomposites (chemistry)
• Oxygen (chemistry)
• Silicone Elastomers (chemistry)
• Soot (chemistry)
• Styrenes (chemistry)
• Tensile Strength
• Thermogravimetry