Composite biomaterials with chemical bonding between hydroxyapatite filler particles and PEG/PBT copolymer matrix

Liu, Qing and Wijn de, Joost R. and Blitterswijk van, Clemens A. (1998) Composite biomaterials with chemical bonding between hydroxyapatite filler particles and PEG/PBT copolymer matrix. Journal of Biomedical Materials Research, 40 (3). pp. 490-497. ISSN 1549-3296

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Abstract:	In an effort to make composites from hydroxyapatite and a PEG/PBT copolymer (PolyactiveTM 70/30), chemical linkages were introduced between the filler particles and polymer matrix using hexamethylene diisocyanate as a coupling agent. Infrared spectra (IR) and thermal gravimetric analysis (TGA) confirmed the presence of PolyactiveTM 70/30 on the surface of HA filler particles. The amount of chemically bound polymer was 4.7 wt.%, as determined by TGA. The mechanical properties of the composites, that is, tensile strength and Young's modulus, were improved significantly by the introduction of a chemical linkage between the filler particles and polymer matrix compared to control composites. This method provides an effective way to introduce chemical linkage between HA filler particles and a polymer matrix. By optimizing the grafting process, a further improvement of the mechanical properties in the composites can be expected.
Item Type:	Article
Copyright:	© 1998 Wiley InterScience
Faculty:	Science and Technology (TNW)
Research Group:	Tissue Regeneration (TR)
Link to this item:	http://purl.utwente.nl/publications/71471
Official URL:	http://dx.doi.org/10.1002/(SICI)1097-4636(19980605)40:3<490::AID-JBM20>3.0.CO;2-M
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