Abstract
Nanosecond time‐resolved Raman spectroscopy has been performed to study polymer films, polytetrafluoroethylene (PTFE), under laser driven shock compression at laser power density of 4.0 GW/cm2. The CF2 stretching mode line of PTFE showed a higher shift (18 cm−1) at delay time of 9.3 ns due to the shock compression and corresponding pressure was estimated to be approximately 2.3 GPa. A new vibrational line at 1900 cm−1 appeared only under shock compression and was assigned to the C=C stretching in transient species such as a monomer (C2F4) produced by the shock‐induced bond scission. Intensity of the new line increased with increasing delay time along propagation of the shock compression.
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