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A nanostructured carbon-reinforced polyisobutylene-based thermoplastic elastomer.
- Source :
-
Biomaterials [Biomaterials] 2010 Mar; Vol. 31 (9), pp. 2477-88. Date of Electronic Publication: 2009 Dec 24. - Publication Year :
- 2010
-
Abstract
- This paper presents the synthesis and characterization of a polyisobutylene (PIB)-based nanostructured carbon-reinforced thermoplastic elastomer. This thermoplastic elastomer is based on a self-assembling block copolymer having a branched PIB core carrying -OH functional groups at each branch point, flanked by blocks of poly(isobutylene-co-para-methylstyrene). The block copolymer has thermolabile physical crosslinks and can be processed as a plastic, yet retains its rubbery properties at room temperature. The carbon-reinforced thermoplastic elastomer had more than twice the tensile strength of the neat polymer, exceeding the strength of medical grade silicone rubber, while remaining significantly softer. The carbon-reinforced thermoplastic elastomer displayed a high T(g) of 126 degrees C, rendering the material steam-sterilizable. The carbon also acted as a free radical trap, increasing the onset temperature of thermal decomposition in the neat polymer from 256.6 degrees C to 327.7 degrees C. The carbon-reinforced thermoplastic elastomer had the lowest water contact angle at 82 degrees and surface nano-topography. After 180 days of implantation into rabbit soft tissues, the carbon-reinforced thermoplastic elastomer had the thinnest tissue capsule around the microdumbbell specimens, with no eosinophiles present. The material also showed excellent integration into bones.<br /> (Copyright 2009 Elsevier Ltd. All rights reserved.)
- Subjects :
- Animals
Bone and Bones cytology
Bone and Bones drug effects
Cell Death drug effects
Hydrolysis drug effects
Implants, Experimental
Magnetic Resonance Spectroscopy
Materials Testing
Mechanical Phenomena drug effects
Microscopy, Atomic Force
Muscles cytology
Muscles drug effects
Prosthesis Implantation
Rabbits
Stress, Mechanical
Surface Properties drug effects
Thermogravimetry
Water chemistry
Carbon pharmacology
Elastomers pharmacology
Nanostructures chemistry
Plastics pharmacology
Polyenes pharmacology
Polymers pharmacology
Temperature
Subjects
Details
- Language :
- English
- ISSN :
- 1878-5905
- Volume :
- 31
- Issue :
- 9
- Database :
- MEDLINE
- Journal :
- Biomaterials
- Publication Type :
- Academic Journal
- Accession number :
- 20034664
- Full Text :
- https://doi.org/10.1016/j.biomaterials.2009.12.003