Solidification behavior of PLLA/nHA nanocomposites |
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Authors: | C Delabarde CJG PlummerP-E Bourban J-AE Månson |
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Affiliation: | Laboratoire de Technologie des Composites et Polymères (LTC), Station 12, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015, Switzerland |
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Abstract: | As part of a broader effort to establish processing-structure–property relationships in PLLA/nHA, which is currently under consideration for bioresorbable scaffolds for bone repair, hot stage optical microscopy and differential scanning calorimetry have been used to investigate the solidification behavior of a series of medical grade PLLA/nHA nanocomposites. The presence of the nHA resulted in an increase in the number of spherulites per unit volume during isothermal crystallization, but there was a substantial decrease in the spherulite growth rate with increasing nHA content in the temperature range 100–130 °C, argued to be associated with a significant increase in the melt viscosity in the presence of the nHA. The consequences for the global solidification rates and the phase structure of the PLLA/nHA nanocomposites are discussed. |
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Keywords: | A Nano composites A Nano particles B Thermal properties D Differential scanning calorimetry D Optical microscopy |
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