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A nanostructured carbon-reinforced polyisobutylene-based thermoplastic elastomer

Paper ID Volume ID Publish Year Pages File Format Full-Text
8457 591 2010 12 PDF Available
Title
A nanostructured carbon-reinforced polyisobutylene-based thermoplastic elastomer
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 Tg of 126 °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 °C to 327.7 °C. The carbon-reinforced thermoplastic elastomer had the lowest water contact angle at 82° 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.

Keywords
Biomaterials; SIBS; Carbon-reinforced thermoplastic elastomer; Mechanical properties; Hydrolytic stability; In vivo biocompatibility
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A nanostructured carbon-reinforced polyisobutylene-based thermoplastic elastomer
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 31, Issue 9, March 2010, Pages 2477–2488
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us