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Open Access research which pushes advances in bionanotechnology

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SIPBS is a major research centre in Scotland focusing on 'new medicines', 'better medicines' and 'better use of medicines'. This includes the exploration of nanoparticles and nanomedicines within the wider research agenda of bionanotechnology, in which the tools of nanotechnology are applied to solve biological problems. At SIPBS multidisciplinary approaches are also pursued to improve bioscience understanding of novel therapeutic targets with the aim of developing therapeutic interventions and the investigation, development and manufacture of drug substances and products.

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The influence of thermo-oxidative degredation on the measured interface strength of glass fibre-polypropylene

Yang, Liu and Thomason, James and Zhu, W.Z. (2011) The influence of thermo-oxidative degredation on the measured interface strength of glass fibre-polypropylene. Composites Part A: Applied Science and Manufacturing, 42 (10). pp. 1293-1300. ISSN 1359-835X

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    It has previously been found that thermal-oxidative degradation of the matrix can strongly affect the apparent interfacial shear strength (IFSS) in glass fibre-polypropylene (GF-PP) measured using the microbond method. In this work, different approaches were employed to further investigate this phenomenon. Hot-stage microscopy was used to establish a profile for dimensional loss of molten PP microdroplets during heat treatment. Under a given thermal load this reduction was found to be related to the initial droplet dimensions. A nanoindentation test was employed to directly probe the mechanical properties of the PP microdroplets, which also exhibited strong dimensional dependence in terms of property deterioration caused by the degradation. Characterisation of thermal mechanical properties and crystallinity was carried out on macroscopic PP samples to assist in elucidating how the polymer degradation affected the measured IFSS. Comparison of the degraded and non-degraded PP microbond samples for IFSS clearly showed the effect of thermal-oxidative degradation on adhesion.