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- Title
Isothermal crystallization behavior of nano-alumina particles-filled poly(ether ether ketone) composites.
- Authors
Wu, J. H.; Yen, M. S.; Chen, C. W.; Kuo, M. C.; Tsai, F. K.; Kuo, J. S.; Yang, L. H.; Huang, J. C.
- Abstract
The isothermal crystallization behavior of nano-alumina particle-filled poly(ether ether ketone) (PEEK) composites has been investigated using differential scanning calorimeter. The results show that all the neat PEEK and nano-alumina-filled PEEK composites exhibit the double-melting behavior under isothermal crystallization. The peak crystallization times (τ p) for all the neat PEEK and PEEK/aluminum oxide (Al2O3) composites increase with increasing crystallization temperature. Moreover, the crystallinity of the PEEK/Al2O3 composite with 7.5 wt % nano-filler content reached the maximum value of 44.8% at 290°C, higher than that of the neat PEEK polymer. From the lower value in τ p and higher value in X c for the PEEK/Al2O3 composites, the inclusion of the nano-alumina into the PEEK matrix favored the occurrence of heterogeneous nucleation. The Avrami exponents n of all the neat PEEK and PEEK/Al2O3 composites ranged from 2 to 3, and the n values for PEEK/Al2O3 composites were slightly higher than that of the neat PEEK polymer, indicating that the inclusion of the nano-filler made the crystallization mechanism more complex. However, the growth rate of crystallization was lowered as the nano- filler was introduced, and the decrease in growth rate reduced the grain size of the PEEK spherulites because of the lowering of molecule mobility during isothermal crystallization. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
- Subjects
CRYSTALLIZATION; POLYMERS; COMPOSITE materials; DIFFERENTIAL scanning calorimetry; POLYETHERS
- Publication
Journal of Applied Polymer Science, 2012, Vol 125, Issue 1, p494
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.35664