Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"UV degradation"”.
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Effect of Transition Metal Compounds on the UV Degradation of Polymers
… of typical nickel complex light stabilisers as UV screens and as additives were compared in model systems initiated by hydroperoxides or carbonyl compounds. Oxygen absorption studies showed the nickel oxime and nickel dithiocarbamate complexes to impart a stability additional to UV screening in …
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UV stabilisation of poly(ethylene terephthalate)
… this project was to design novel polymerisable UV absorbers which successfully protect PET from UV degradation for a longer duration of time compared to non-polymerisable UV stabilising additives. The polymerisable UV stabilisers for PET were synthesised using cyanuric chloride as a synthetic …
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Excited state intramolecular proton transfer (ESIPT) to nitrogen in heterocyclic compounds
… of energy (e. g. for polymer protection against UV degradation) and to produce fluorophores with large Stokes shifts. Approximately half of the compounds studied to date involve ESIPT to nitrogen but there has been no real attempt at a coherent study of ESIPT to nitrogen. In this work we have …
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The Accelerated Photo-Degradation of Low Density Polyethylene
… of compounds of various structural types having uv-absorption characteristics in the range 280 - 340 nm as possible photo-activators to low density polyethylene (LDPE). They included benzophenone, substituted benzophenones, metal-di-thiocarbamates, transitional metal-complexes containing ligands, …
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Effect of photoageing and plasticizer content on the mechanical and adhesive properties of polyvinylbutyral
… is highly suitable as an interlayer material. UV radiation exposure was used to simulate the effect of sunlight on PVB. Forty micron thick samples were irradiated for up to 1000 hours of exposure time and analyzed using FTIR spectroscopy. It was determined that photo degradation had occurred in …