Light scattering by fractons in polymers

✍ Scribed by V.K. Malinovsky; V.N. Novikov; A.P. Sokolov; V.A. Bagryansky

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 283 KB
• Volume: 143
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(88)87021-0

✦ Synopsis

In amorphous polymers (PMMA and PS) the low-frequency mode in Raman spectra is found to be dependent on frequency according to a power law. The exponent depends on the thermal history of the sample. The results obtained are explained in terms of a fracton description of localized vibrations. The spectral dimension of the vibrational excitations and the size of the fractal region in the investigated polymers are found to be 1.40 and 40 A, respectively.