Dynamic mechanical properties of hydroxyapatite-ethylene vinyl acetate copolymer composites

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dc.contributor.authorVelayudhan, S
dc.contributor.authorRamesh, P
dc.contributor.authorVarma, HK
dc.contributor.authorFriedrich, K
dc.date.accessioned2017-03-10T03:26:21Z
dc.date.available2017-03-10T03:26:21Z
dc.date.issued2005
dc.description.abstractDynamic mechanical thermal analysis (DMTA) was carried out to explore the dependence of temperature on the viscoelasticity of composites consisting of synthetic hydroxyapatite (HAP) particulate filled ethylene vinyl acetate copolymer (EVA). Two forms of HAP, differing in their surface characteristics and particle size, were used for the study. The freeze-dried HAP (FDHAP) had a mean particle size of 49.18 mum and an irregular surface morphology. In the contrary the spray dried form of HAP (SDHAP) had a mean particle size of 5.84 (m and a spherical morphology. The dynamic mechanical analysis of the composites showed that both, particle size and morphology, had a significant effect on viscoelastic properties. A tremendous increase of the storage modulus was noted with the addition of HAP. Above the T-g of the polymer matrix, the values were marginally higher for the composites containing FDHAP than for those with SDHAP. The damping (tan delta) was found to decrease with the inclusion of HAP. A marginal upper shift in the value of the glass transition temperature (T-g) was observed for the composites fabricated from SDHAP indicating a slightly strong interaction between this HAP and the EVA matrix. (C) 2004 Elsevier B.V. All rights reserved.
dc.identifier.citation89 ,42796;454-460en_US
dc.identifier.uri10.1016/j.matchemphys.2004.10.004
dc.identifier.urihttps://dspace.sctimst.ac.in/handle/123456789/9619
dc.publisherMATERIALS CHEMISTRY AND PHYSICS
dc.subjectMaterials Science
dc.titleDynamic mechanical properties of hydroxyapatite-ethylene vinyl acetate copolymer composites
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