Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Photopolymer> ?p ?o }
- Photopolymer abstract "A photopolymer is a polymer that changes its properties when exposed to light, often in the ultraviolet or visible region of the electromagnetic spectrum. These changes are often manifested structurally, for example hardening of the material occurs as a result of cross-linking when exposed to light. An example is shown below depicting a mixture of monomers, oligomers, and photoinitiators that conform into a hardened polymeric material through a process called curing,.A wide variety of technologically useful applications rely on photopolymers, for example some enamels and varnishes depend on photopolymer formulation for proper hardening upon exposure to light. In some instances, an enamel can cure in a fraction of a second when exposed to light, as opposed to thermally cured enamels which can require half an hour or longer. Curable materials are widely used for medical, printing, and photoresist technologies. Changes in structural and chemical properties can be induced internally by chromophores that the polymer subunit already possesses, or externally by addition of photosensitive molecules. Typically a photopolymer consists of a mixture of multifunctional monomers and oligomers in order to achieve the desired physical properties, and therefore a wide variety of monomers and oligomers have been developed that can polymerize in the presence of light either through internal or external initiation. Photopolymers undergo a process called curing, where oligomers are cross-linked upon exposure to light, forming what is known as a network polymer. The result of photo curing is the formation of a thermoset network of polymers. One of the advantages of photo-curing is that it can be done selectively using high energy light sources, for example lasers, however, most systems are not readily activated by light, and in this case a photoinitiator is required. Photoinitiators are compounds that upon radiation of light decompose into reactive species that activate polymerization of specific functional groups on the oligomers. An example of a mixture that undergoes cross-linking when exposed to light is shown below. The mixture consists of monomeric styrene and oligomeric acrylates.Most commonly, photopolymerized systems are typically cured through UV radiation, since ultraviolet light is more energetic; however, the development of dye-based photoinitiator systems have allowed for the use of visible light, having potential advantages of processes that are more simple and safe to handle. UV curing in industrial processes has greatly expanded over the past several decades. Many traditional thermally cured and solvent-based technologies can be replaced by photopolymerization technologies. The advantages of photopolymerization over thermally cured polymerization include high rates of polymerization and environmental benefits from elimination of volatile organic solvents.There are two general routes for photoinitiation: free radical and ionic. The general process involves doping a batch of neat polymer with small amounts of photoinitiator, followed by selective radiation of light, resulting a highly cross-linked product. Many of these reactions do not require solvent which eliminates termination path via reaction of initiators with solvent and impurities, in addition to decreasing the overall cost.".
- Photopolymer thumbnail Photo-polymer_scheme1.svg?width=300.
- Photopolymer wikiPageID "4226883".
- Photopolymer wikiPageLength "28900".
- Photopolymer wikiPageOutDegree "306".
- Photopolymer wikiPageRevisionID "682513963".
- Photopolymer wikiPageWikiLink 3D_imaging.
- Photopolymer wikiPageWikiLink 3D_printing.
- Photopolymer wikiPageWikiLink 3D_reconstruction.
- Photopolymer wikiPageWikiLink Acetal.
- Photopolymer wikiPageWikiLink Acetophenone.
- Photopolymer wikiPageWikiLink Acetophenones.
- Photopolymer wikiPageWikiLink Acrylate.
- Photopolymer wikiPageWikiLink Acrylates.
- Photopolymer wikiPageWikiLink Acrylic_acid.
- Photopolymer wikiPageWikiLink Ammonium.
- Photopolymer wikiPageWikiLink Anion.
- Photopolymer wikiPageWikiLink Anionic.
- Photopolymer wikiPageWikiLink Arene.
- Photopolymer wikiPageWikiLink Aromatic_hydrocarbon.
- Photopolymer wikiPageWikiLink Benzophenone.
- Photopolymer wikiPageWikiLink Branching_(polymer_chemistry).
- Photopolymer wikiPageWikiLink Brønsted_acid.
- Photopolymer wikiPageWikiLink Brønsted–Lowry_acid–base_theory.
- Photopolymer wikiPageWikiLink Carbazole.
- Photopolymer wikiPageWikiLink Category:Photochemistry.
- Photopolymer wikiPageWikiLink Category:Polymers.
- Photopolymer wikiPageWikiLink Catheter.
- Photopolymer wikiPageWikiLink Catheters.
- Photopolymer wikiPageWikiLink Cationic.
- Photopolymer wikiPageWikiLink Cationic_polymerization.
- Photopolymer wikiPageWikiLink Chain-growth_polymerization.
- Photopolymer wikiPageWikiLink Chain_propagation.
- Photopolymer wikiPageWikiLink Chain_termination.
- Photopolymer wikiPageWikiLink Chain_transfer.
- Photopolymer wikiPageWikiLink Chromophore.
- Photopolymer wikiPageWikiLink Chromophores.
- Photopolymer wikiPageWikiLink Computer-aided_technologies.
- Photopolymer wikiPageWikiLink Cross-link.
- Photopolymer wikiPageWikiLink Cross-linked.
- Photopolymer wikiPageWikiLink Curing_(chemistry).
- Photopolymer wikiPageWikiLink Dental_composite.
- Photopolymer wikiPageWikiLink Deprotonation.
- Photopolymer wikiPageWikiLink Digital_imaging.
- Photopolymer wikiPageWikiLink Electromagnetic_spectrum.
- Photopolymer wikiPageWikiLink Electron_transfer.
- Photopolymer wikiPageWikiLink Enamel_paint.
- Photopolymer wikiPageWikiLink Epoxide.
- Photopolymer wikiPageWikiLink Epoxides.
- Photopolymer wikiPageWikiLink Epoxy.
- Photopolymer wikiPageWikiLink Ether.
- Photopolymer wikiPageWikiLink Ethers.
- Photopolymer wikiPageWikiLink Ex_vivo.
- Photopolymer wikiPageWikiLink Ferrocene.
- Photopolymer wikiPageWikiLink Free_radical.
- Photopolymer wikiPageWikiLink Function_(engineering).
- Photopolymer wikiPageWikiLink Functional_group.
- Photopolymer wikiPageWikiLink Halonium_ion.
- Photopolymer wikiPageWikiLink Hearing_aid.
- Photopolymer wikiPageWikiLink Heterolysis_(chemistry).
- Photopolymer wikiPageWikiLink Homolysis_(chemistry).
- Photopolymer wikiPageWikiLink Hydrogen.
- Photopolymer wikiPageWikiLink Hydrolysis.
- Photopolymer wikiPageWikiLink Hydrolyze.
- Photopolymer wikiPageWikiLink In_vivo.
- Photopolymer wikiPageWikiLink Inert.
- Photopolymer wikiPageWikiLink Initiation.
- Photopolymer wikiPageWikiLink Initiation_(chemistry).
- Photopolymer wikiPageWikiLink Intramolecular.
- Photopolymer wikiPageWikiLink Intramolecular_reaction.
- Photopolymer wikiPageWikiLink Ion.
- Photopolymer wikiPageWikiLink Ionic_bond.
- Photopolymer wikiPageWikiLink Ionic_bonding.
- Photopolymer wikiPageWikiLink Ivan_Ostromislensky.
- Photopolymer wikiPageWikiLink Kinetic_chain_length.
- Photopolymer wikiPageWikiLink Labile.
- Photopolymer wikiPageWikiLink Lability.
- Photopolymer wikiPageWikiLink Lactone.
- Photopolymer wikiPageWikiLink Lactones.
- Photopolymer wikiPageWikiLink Laser.
- Photopolymer wikiPageWikiLink Lasers.
- Photopolymer wikiPageWikiLink Letterpress_printing.
- Photopolymer wikiPageWikiLink Lewis_acid.
- Photopolymer wikiPageWikiLink Lewis_acids_and_bases.
- Photopolymer wikiPageWikiLink Ligand.
- Photopolymer wikiPageWikiLink Light.
- Photopolymer wikiPageWikiLink Metal_type.
- Photopolymer wikiPageWikiLink Methacrylate.
- Photopolymer wikiPageWikiLink Microelectronics.
- Photopolymer wikiPageWikiLink Monomer.
- Photopolymer wikiPageWikiLink Monomers.
- Photopolymer wikiPageWikiLink N-Vinylpyrrolidone.
- Photopolymer wikiPageWikiLink Nitrogen.
- Photopolymer wikiPageWikiLink Nucleophile.
- Photopolymer wikiPageWikiLink Oligomer.
- Photopolymer wikiPageWikiLink Oligomers.
- Photopolymer wikiPageWikiLink Onium_compound.
- Photopolymer wikiPageWikiLink Onium_compounds.
- Photopolymer wikiPageWikiLink Organic_solvent.
- Photopolymer wikiPageWikiLink Organometallic.