Light poly based

One of the most interesting problems was evaluation of quantum yield for light induced crosslinking of poly(vinyl butyral) in the presence of diphenyl sulphoxide. Mathematical treatment of the molecular changes produced in polymers by light is based on that by ionizing radiation. In our case, as the changes above the gel point were examined, the only suitable approach... 

Another development has been the advent of the dual-cure resin cements. These are hybrids of glass polyalkenoate cements and methacrylates that set both by an add-base cementation reaction and by vinyl polymerization (which may be initiated by light-curing). In these materials, the solvent is not water but a mixture of water and hydroxyethylmethacrylate which is capable of taking dimethacrylates and poly(acrylic add)-containing vinyl groups into solution. In the absence of light these materials set slowly and... 

Poly(butyl methacrylate) (PBMA) began to be used as a picture varnish in the early 1930s. It encountered a considerable success because of its resistance to yellowing, adequate flexibility, no dirt pick-up and good solubility in nonpolar hydrocarbon solvents. Products based on PBMA, such as Elvacite 2044 and Elvacite 2045 by Du Pont, were abandoned when it was discovered that under light exposure they cross-link to an unexpected extent becoming insoluble [64]. From this point of view acrylic copolymers based on methyl and ethyl acrylates/methacrylates show a much better long-term stability. 

J Griiner, PJ Hamer, RH Friend, HJ Huber, U Scherf, and AB Holmes, A high efficiency blue-light-emitting diode based on novel ladder poly(p-phenylene)s, Adv. Mater., 6 748-752, 1994. 

J Kido, H Shionoya, and K Nagai, Single-layer white light-emitting organic electroluminescent devices based on dye-dispersed poly(Y-vinylcarbazolc), Appl. Phys. Lett., 67 2281-2283, 1995. 

NT Harrison, N Tessler, CJ Moss, RH Friend, and K Pichler, Peak current density and brightness from poly (p-phenylene vinyIcnc) based light-emitting diodes, Opt. Mater., 9 178-182, 1998. 

Single- and heterolayer polymeric light emitting diodes based on poly(p-phenylene vinylene) and oxadiazole polymers W. RieB Organic Electroluminescent Materials and Devices, S. Miyata and H.S. Nalwa, Eds., Gordon and Breach, Amsterdam, pp. 73-146... 

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