Low-energy excitations in stressed poly(methyl methacrylate)

✍ Scribed by Katherine Kober; A. Tshmel

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 107 KB
• Volume: 38
• Category: Article
• ISSN: 0887-6266
• DOI: 10.1002/(sici)1099-0488(20000501)38:9<1133::aid-polb4>3.0.co;2-x

✦ Synopsis

Raman study of flexure stressed poly(methyl methacrylate) (PMMA) plates at the frequency range of libration mode (80 cm Ϫ1 ), boson peak (14 cm Ϫ1 ), and quasielastic light scattering (QLS) (below 20 cm Ϫ1 ) is presented. The reversible changes in the vicinity of the Rayleigh line were attributed to partial disturbance of the midrange order due to stress-induced redistribution of random fluctuations of orientation.