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Poly(d,l-cactide/ε-caprolactone)/hydroxyapatite composites

Paper ID Volume ID Publish Year Pages File Format Full-Text
13648 888 2000 8 PDF Available
Title
Poly(d,l-cactide/ε-caprolactone)/hydroxyapatite composites
Abstract

In this study, elastomeric d,l-lactide and ε-caprolactone copolymers with two different molecular weights (Mn: 108.000 and 40.000) were synthesized by ring-opening polymerization of the respective dimers by using stannous octoate as the catalyst, as a potential bone-filling material. The final ratio of d,l-lactide to ε-caprolactone obtained by was 60/40 (comparing to the initial ratio of 50/50). Both copolymers were amorphous having Tg at around −21°C. Different amounts of hydroxyapatite (HA) powder were loaded within the copolymers. These composites were easily shaped by hand. Mechanical properties of the composites changed with the HA loading and the molecular weight of the copolymer. The percent elongation decreased, while both the Young's modulus and yield point (stress) increased with the HA content. The copolymers were degraded within the Ringer solutions in about 6 weeks. The molecular weight distribution became broader during degradation. Incorporation of HA reduced the degradation rate.

Keywords
Poly(d,l-lactide/ε-caprolactone)copolymers; Hydroxyapatite; Bone filler
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 21, Issue 21, 1 November 2000, Pages 2147–2154
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