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Low‐energy excitations in stressed poly(methyl methacrylate) |
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| Authors: | Katherine Kober A. Tshmel |
| Abstract: | Raman study of flexure stressed poly(methyl methacrylate) (PMMA) plates at the frequency range of libration mode (80 cm−1), boson peak (14 cm−1), and quasi‐elastic light scattering (QLS) (below 20 cm−1) 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. © 2000 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 38: 1133–1136, 2000 |
| Keywords: | low‐frequency Raman spectroscopy PMMA stress‐induced transformation orientation |