The effect of chemical structure and phase morphology on the fatigue properties of thermoplastic elastomer biomaterials

POLY 607

Miroslawa El Fray, mirfray@ps.pl, Polymer Institute, Biomaterials and Functional Polymers Laboratory, Szczecin University of Technology, Pulaskiego 10, Szczecin, 70-322, Poland, Judit E. Puskas, Department of Polymer Science, The University of Akron, Goodyear Polymer Center, Akron, OH 44325-3909, and Volker Altstädt, altstaedt@uni-bayreuth.de, Polymer Engineering, University of Bayreuth, Universitätsstr. 30, Bayreuth, 95440, Germany.
This paper discusses investigation of the “dynamic stress-relaxation” response of new biomaterials: a polystyrene-b-polyisobutylene-b-polystyrene triblock copolymer (TS30) and (A-B)n multiblock polyesters with comparable hard segment content (26 and 30 wt%). The fatigue properties will be correlated with the chemical structure -long rubbery blocks of poly(isobutylene) in TS30 and aliphatic and short chain dilinoleic acid (dimer fatty acid) segments in M26_74. Introduction of 4 and 11wt% PDMS into the soft phases of M26_74 multiblocks led to significant changes in the overall fatigue properties, which can be ascribed to changes in the chemical structure and phase morphology of these systems. The fatigue properties of thermoplastic elastomer biomaterials investigated in this study compare very well with the commercially available Pellethane-80AE, a poly(ether–urethane) biomaterial.
 

7th International Biorelated Polymers Symposium
1:30 PM-5:20 PM, Wednesday, 13 September 2006 San Francisco Marriott -- Salon 14/15, Oral

Division of Polymer Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006