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Abstract

Tensile and shear properties were determined for hydroxyapatite reinforced poly-ethylene composites (HAPEX) for medical applications. Properties of talc or alumina filled polyethylene were also obtained. Hydroxyapatite particles of different median sizes and morphologies were used to reinforce the polyethylene. Furthermore, chemical coupling of hydroxyapatite to polyethylene was investigated. The obtained results are discussed in terms of possible use as orthodontic materials.

Thermomechanical properties of poly(lactic acid) films reinforced with hydroxyapatite and regenerated cellulose microfibers

“…In the case of PLA/HAp films, modified with the fibrous type cellulose, the filler's irregular orientation at the composites' cross‐section (apparent in the SEM images in Figure ), concealed the stiffening potential of the fibrous type cellulose. It can be seen that the undesirable impact of these factors gets severe as the fiber content is increased and Young's modulus decrease from 2 GPa for composite with 3 wt % FCP to 1.8 GPa for the composite with 20 wt % FCP, which contradicts previously reported results . This is also likely to be the consequence of the interference of the long fibers with perpendicular orientation of the crystallite lamella planes with respect to machining direction …”

Effect of the wine lees wastes as cost‐advantage and natural fillers on the thermal and mechanical properties of poly(3‐hydroxybutyrate‐co‐hydroxyhexanoate) (PHBH) and poly(3‐hydroxybutyrate‐co‐hydroxyvalerate) (PHBV)

“…In composites filled with particles, the tensile properties (Young's modulus, tensile strength, and elongation at break) depend mainly on three factors: particles size, particle–matrix interface adhesion, and the particle loading . The Young's modulus increases progressively with the WL content similarly to other works on composites . In fact, among the three previous mentioned factors, particle loading is the one more affecting the Young's modulus.…”

High density polyethylene/ultra high molecular weight polyethylene blend. II. Effect of hydroxyapatite on processing, thermal, and mechanical properties

“…Among the polymers used are polyetheretherketone (PEEK), polyaryletherketone (PAEK), polysulfone, epoxy, poly( L ‐lactic acid) (PLLA), polyhydroxybutyrate, and polyethylene (PE). The reinforcing phase consists of glass fibers, carbon fibers, bioactive glass, and hydroxyapatite (HA) 6–10…”