Effect of initial γ-irradiation on infrared laser ablation of poly(vinyl alcohol) studied by infrared spectroscopy

Sadulla R. Allayarov,Matthew P. Confer,David A. Dixon,Tatyana N. Rudneva,Leonid A. Kalinin,Evgenii M. Tolstopyatov,Ivan A. Frolov,Leonid F. Ivanov,Petr N. Grakovich, Oleg N. Golodkov

Polymer Degradation and Stability（2020）

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摘要

•Initial γ-irradiation reduces PVA ablation from a CO2 laser.•Rate of PVA laser ablation decreases with time.•OH and CH groups decrease with laser ablation forming multiple bonds.•G3(MP2) calculations used to predict mechanism for the initial degradation steps.•Water catalyzes PVA decomposition.

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关键词

Poly(vinyl alcohol),Initial γ-irradiation,Ablation by continuous CO2 laser,Infrared spectra,Correlated G3(MP2) molecular orbital theory,Predicted decomposition thermodynamics

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