| Journal: | Polimeros (Sao Carlos) |
| Database: | PERIÓDICA |
| System number: | 000314102 |
| ISSN: | 1678-5169 |
| Authors: | Altstaedt, Volker1 Werner, Philipp Sandler, Jan2 |
| Institutions: | 1Universitaet Bayreuth, Lehrstuhl fuer Polymere Werkstoffe, Bayreuth, Baviera. Alemania 2University of Cambridge, Department of Materials Science and Metallurgy, Cambridge, Cambridgeshire. Reino Unido |
| Year: | 2003 |
| Season: | Oct-Dic |
| Volumen: | 13 |
| Number: | 4 |
| Pages: | 218-222 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, analítico |
| English abstract | Poly(ether ether ketone) nanocomposites containing vapour-grown carbon nanofibres (CNF) were produced using standard polymer processing techniques. At high shear rates no significant increase in resin viscosity was observed. Nevertheless, the addition of the CNFs results in a higher melt strength at 360°C. Electron microscopy confirmed the homogeneous dispersion and alignment of nanofibres in the polymer matrix. Evaluation of the mechanical composite properties revealed a linear increase in tensile stiffness and strength with nanofibre loading fractions up to 15 wt% whilst matrix ductility was maintained up to 10 wt%. An interpretation of the composite performance by short-fibre theory resulted in rather low intrinsic stiffness properties of the vapour-grown CNF. Differential scanning calorimetry was used to investigate crystallization kinetics and degree of crystallinity. The CNFs were found not to act as nucleating sites. Furthermore, unidirectional sliding tests against two different counterpart materials (100Cr6 martensitic bearing steel, X5CrNi18-10 austenitic stainless steel) were performed. The carbon nanofibres were found to reduce the wear rate of PEEK significantly |
| Disciplines: | Química |
| Keyword: | Química de polímeros, Nanocompuestos, Nanofibras de carbono, Poli (éter-éter-cetona), Propiedades mecánicas, Tribología, Reología |
| Keyword: | Chemistry, Polymer chemistry, Poly(ether ether ketone), Nanocomposites, Carbon nanofibers, Mechanical properties, Tribology, Rheology |
| Full text: | Texto completo (Ver HTML) |
