title: 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.affiliation: Department of Polymer Engineering, Faculty of Engineering Science, University of Bayreuth, Universitätsstraβe 30, Bayreuth D-95447, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Götz
authors.affiliation: Department of Chemical and Biomolecular Engineering, University of Akron, Akron, OH 44325-0406, USA.
authors.forename: G T
authors.initials: GT
authors.lastname: Lim
authors.affiliation: Department of Chemical and Biomolecular Engineering, University of Akron, Akron, OH 44325-0406, USA; Department of Polymer Science, University of Akron, Akron, OH 44325-3909, USA.
authors.forename: J E
authors.initials: JE
authors.lastname: Puskas
authors.affiliation: Department of Polymer Engineering, Faculty of Engineering Science, University of Bayreuth, Universitätsstraβe 30, Bayreuth D-95447, Germany. Electronic address: altstaedt@uni-bayreuth.de.
authors.forename: V
authors.initials: V
authors.lastname: Altstädt
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D003432:Cross-Linking Reagents / Q000737:chemistry; D004548:Elasticity; D020724:Elastomers; D008422:Materials Testing; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry; D012826:Silicone Elastomers / Q000737:chemistry; D053260:Soot / Q000737:chemistry*; D013343:Styrenes / Q000737:chemistry*; D013718:Tensile Strength; D013818:Thermogravimetry
chemical_list: D001672:Biocompatible Materials; D003432:Cross-Linking Reagents; D020724:Elastomers; D012826:Silicone Elastomers; D053260:Soot; D013343:Styrenes; C500040:poly(styrene-b-isobutylene-b-styrene); D010100:Oxygen
keywords: Biomaterial; Dynamic creep; Poly(isobutylene-b-para-methylstyrene) block copolymer; SIBS; Thermoplastic elastomers