Printed in Great Britain . LASER
نویسنده
چکیده
Although flash and laser techniques have been widely applied to the spectroscopical investigation of small molecules, it appears that up to now, they have not been extensively used to study the primary photo— degradation processes in polymeric materials. The study of polyvinylphe— nylketone shows that laser flash spectroscopy permits the identification of a particular kinetic decay of a quencher triplet state. Picosecond and nanosecond spectroscopy permits the study of the various phenomena involved in the photodegradation which occurs according to Norrish type II process triplet and biradical generation, their decay and their absorption spectra.
منابع مشابه
Deinking of Laser Printed Copy Paper by Chemical Different Treatments and Effect on Optical and Strength Properties of Paper
Paper recycling in an increasingly environmentally conscious world is gaining importance. Withrapid developments in deinking processes for the reuse of secondary fibers being made, therecycling process is become more and more efficient. This work investigated the effect ofchemical different treatments including H2O2 and NaOH on repulping and flotation operationsduring the deinking of laser prin...
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