Evaluating the single-shot photodegradation of optically-transparent bulk polymers under two-photon Raman-resonant laser irradiation in nanosecond regime (multiplex CARS test)
POLYMER TESTING(2024)
摘要
Laser-induced photodegradation of bulk optically-transparent polymers was probed under laser irradiation at two-photon Raman resonance. The photodegradation effect was inspected for organic polymers poly-(methyl methacrylate) and polystyrene by means of single-shot multiplex coherent anti-Stokes Raman scattering (CARS) spectroscopy performed with nanosecond-pulsed laser sources. Under such conditions of photoirradiation in the visible spectral range, the laser pulse intensity threshold for photodegradation of these polymers was determined.
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关键词
Polymer photodegradation,Single-shot laser irradiation,Polymethylmethacrylate,Polystyrene,Two-photon Raman resonance,Coherent anti-Stokes Raman scattering (CARS),spectroscopy
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