Agostinetto, Angela (2012) Preparazione e caratterizzazione di compositi a base di policaprolattone e fibre da elettrospinning. [Laurea specialistica biennale]
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Electrospun nanofibers are rarely used as reinforcing agents in polymer-based composites. A fabrication approach is presented that allows to easily prepare composites based on polycaprolactone (PCL) filled with polystyrene (PS) and polivinylidene fluoride (PVDF) based fibres by compression moulding. The presence of fibres with a very small diameter favoured a good interfacial adhesion between matrix and filler. Being of a similar order of magnitude than polymer lamellae, electrospun fibres can be used to shape the morphology of lamellar stacks, and therefore the final properties of the composites. Thermal behaviour as well as the crystalline structure were investigated using DSC, and X-Ray technique, showing a change in the degree of cristallinity within the addition of a filler. The tensile properties of the samples were measured, and SEM picture obtained. Degradation behaviour was studied by leaving the samples in a NaOH solution for 22 weeks, and weighing them regularly; the degradation is not accelerate by the presence of fibres but they help to keep the pristine structure.
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