Skip to main content Accessibility help
×
Home

Structural evolution and acoustic phonon behavior in crystalline PTFE latex films

  • M. Pierno (a1), C.S. Casari (a1), A. Li Bassi (a1), M.G. Beghi (a1), R. Piazza (a1) and C.E. Bottani (a1)...

Abstract

The structural evolution of polytetrafluoroethylene (PTFE) crystalline polymer latex films is studied at hundreds nanometer length scale by atomic force microscopy and Brillouin light scattering. In a controlled sintering process the transition is observed from the original particle distribution towards a ‘fibrillar’ structure of crystalline regions embedded in a disordered matrix. This transition is accompanied by a cross-over from localized acoustic excitations to propagating acoustic phonons, related to mesoscopic elastic properties. After sintering, a ‘mark’ of the original particulate structure persists, suggesting that filming of crystalline polymers may be analogous to sintering of ceramic powders. Films of crystalline polymers can thus be exploited as model systems to study the elasto-optical properties of granular and disordered media.

Copyright

References

Hide All
1. Steward, P. A., Hearn, J., and Wilkinson, M. C., Adv. Coll. Interface Sci. 86, 195 (2000).
2. Sprik, M., Rothlisberger, U., and Klein, M. L., Mol. Physics 76, 355 (1999).
3. Schwodiauer, R., Neugschwandtner, G. S., Bauer-Gogonea, S., Bauer, S., and , Rosenmayer, Appl. Phys. Lett. 76, 3310 (2000).
4. David, L., Sachot, C., Guenin, G., and Perez, J., J. Phys. (Paris) IV 6, C8 421 (1996).
5. Degiorgio, V., Piazza, R., Bellini, T., and Visca, M., Adv. Coll. Interface Sci. 48, 61 (1994).
6. Bottani, C. E., Bassi, A. Li, Stella, A., Cheyssac, P., and Kofman, R., Europhys. Lett. 56, 1386 (2001).
7. Korsunsky, A. M., Encyclopedia of Materials: Science and Technology (Elsevier Science, New York, 2001), vol. 3, pp. 24002406.
8. Dresselhaus, M. and Dresselhaus, G., in Light Scattering in Solids III, ed. Cardona, M. and Günterhodt, G. (Springer-Verlag, New York, 1982), Topics in Applied Physics, pp. 3138
9. Nizzoli, F. and Sandercock, J. R., in Dynamical Properties of Solids, ed. Horton, G. and Maradudin, A. (North Holland, Amsterdam, 1990) pp 281, 293.
10. Ring, T. A., Fundamentals of Ceramics Powder Processing and Synthesis (Academic, San Diego, 1996).

Structural evolution and acoustic phonon behavior in crystalline PTFE latex films

  • M. Pierno (a1), C.S. Casari (a1), A. Li Bassi (a1), M.G. Beghi (a1), R. Piazza (a1) and C.E. Bottani (a1)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed