Probing the relationship between the scales of space and time in an entangled polymer network with an oscillating nanotip

Autor: J. P. Aimé, F. Dubourg, S. Marsaudon, R. Boisgard, G. Couturier
Přispěvatelé: Bergeret, Bernadette
Rok vydání: 2003
Předmět:
Zdroj: Journal of Physics: Condensed Matter. 15:6167-6177
ISSN: 1361-648X
0953-8984
DOI: 10.1088/0953-8984/15/36/307
Popis: The dynamical behaviour of an entangled network, a melt made of long polymer chains, with an oscillating nanotip, is investigated to provide evidence for a close relationship between the spatial scale and dynamics of the network, from the molecular to the mesoscopic scale. The experimental results show how a dynamic force microscope is able to discriminate between slow and fast relaxation processes related to molecular motion at different scales. In particular, it is shown that within a very small variation of the tip indentation depth, a few angstroms, the relaxation times involved in the process of dissipation vary by more than three orders of magnitude.
Databáze: OpenAIRE