61,984 articles
PolyPlus Battery
PolyPlus Battery Company is a Berkeley, California battery developer founded in 1991, best known for its protected lithium electrode, a ceramic membrane enabling record-energy-density lithium-water, lithium-air, and lithium-seawater batteries.
Polypropylene fiber
Polypropylene fiber is a synthetic fiber made by melt spinning polypropylene. It is the lightest commercial textile fiber, absorbing almost no moisture, and is used in ropes, carpets, and nonwovens.
Polypropylene separator
A polypropylene separator is a microporous polypropylene membrane between a lithium-ion battery's electrodes that prevents short circuit while letting lithium ions pass, known for low cost and thermal shutdown.
Polypropylene upcycling
Polypropylene upcycling is the set of chemical and catalytic processes converting waste polypropylene into higher-value products such as fuels, surfactants, and monomers, mainly through pyrolysis, hydrogenolysis, and oxidation.
Polypyrrole
Polypyrrole (PPy) is an intrinsically conducting organic polymer formed by oxidative coupling of pyrrole units, first synthesized in 1915 and valued for conductivity, stability, and biocompatibility.
Polysemanticity
Polysemanticity is the phenomenon in which a single neuron in a trained neural network activates in multiple unrelated contexts; the leading explanation is superposition, and sparse autoencoders are the main remedy.
Polysius
Polysius is a German cement plant engineering company founded in 1859 in Dessau, now thyssenkrupp Polysius GmbH in Beckum, known for its rotary kiln, the Lepol kiln, and cement decarbonization technologies.
Polystyrene recycling
Polystyrene recycling is the recovery of waste polystyrene, including expanded foam packaging, through mechanical reprocessing, pyrolysis back to styrene monomer, or upcycling, though low collection economics keep rates low.
Polystyrene sulfonate
Polystyrene sulfonate is a non-absorbed cation-exchange resin, sold as Kayexalate and Kionex, used to treat hyperkalemia by exchanging sodium for potassium in the gut; approved by the FDA in 1958.
Polystyrene upcycling
Polystyrene upcycling is the conversion of waste polystyrene into higher-value products, covering chemical upcycling into chemicals like benzoic acid and styrene monomer, and physical upcycling that improves recycled material, in contrast to downcycling.
Polysulfide shuttle suppression
Polysulfide shuttle suppression is the set of materials and design strategies that stop soluble lithium polysulfides from migrating between cathode and anode in lithium–sulfur batteries.
Polytetrafluoroethylene
Polytetrafluoroethylene (PTFE), sold as Teflon, is a slippery, chemically resistant fluoropolymer discovered accidentally by Roy Plunkett at DuPont in 1938, best known as the nonstick coating on cookware.
Polytetrafluoroethylene binder
The polytetrafluoroethylene (PTFE) binder is a fluoropolymer used in dry battery electrode processing, where mechanical shear turns PTFE particles into a fibrous, solvent-free binding network.
Polythiophene
Polythiophene is a conjugated conducting polymer of linked thiophene rings that is semiconducting when neutral and conductive when doped, first well-defined synthesis reported in 1980.
Polytron (electronics company)
Polytron is an Indonesian consumer electronics brand made by PT Hartono Istana Teknologi, founded in 1975 in Kudus, Central Java, known for televisions, audio, and electric vehicles.
Polyurethane adhesive
A polyurethane adhesive is an adhesive made from polyurethane polymers, formed by reacting isocyanates with polyols, and chosen where flexible bonds between dissimilar materials matter more than stiffness.
Polyurethane coating
A polyurethane coating is a protective surface film of polyurethane polymers applied to wood, metal, concrete, and other substrates, widely used in aerospace and automotive refinish.
Polyurethane foam
Polyurethane foam is a cellular thermoset polymer made by reacting isocyanates with polyols, used as rigid building insulation, spray foam, and flexible cushioning in furniture, bedding, and car seats.
Polyurethane recycling
Polyurethane recycling is the recovery of material value from waste polyurethane, a cross-linked thermoset that cannot be remelted, using mechanical regrinding or chemical depolymerization such as glycolysis.
Polyus (Полюс) (spacecraft)
Polyus, also designated Skif-DM, was a Soviet experimental spacecraft launched on May 15, 1987 as the payload of the Energia rocket's maiden flight; a guidance failure prevented orbital insertion.
Polyvinyl butyral
Polyvinyl butyral (PVB), also known as Butacite, is a thermoplastic resin best known as the plastic interlayer bonding glass sheets in laminated safety glass, and also used in coatings, inks, and adhesives.
Polyvinyl chloride
Polyvinyl chloride (PVC), also called polychloroethene, is a synthetic thermoplastic polymer made by polymerizing vinyl chloride, used mainly in construction for pipes, windows, and flooring, with global production of 44.3 million tons in 2018.
Polyvinyl chloride recycling
Polyvinyl chloride recycling recovers waste PVC, the third most used thermoplastic, through mechanical, dissolution, or chemical routes; high chlorine content and legacy additives make it hard.
Polyvinylpyrrolidone
Polyvinylpyrrolidone, also called povidone or polyvidone, is a water-soluble synthetic polymer patented in 1939 and widely used as a binder and film former in pharmaceuticals and cosmetics.
Pomade
Pomade, historically called pomatum, is a scented, greasy or waxy hair dressing used to hold and shine styled hair; the name reflects an original recipe of mashed apples in grease.
Pomeranian Crude Oil Pipeline
The Pomeranian Crude Oil Pipeline (Rurociąg Pomorski) is a bidirectional Polish crude oil pipeline operated by PERN, linking the Gdańsk oil terminal with the Płock refinery since 1975.
Pompano Beach Airpark
Pompano Beach Airpark, also known as Pompano Beach Airport, is a city-owned general aviation airport in Pompano Beach, Florida. Built during World War II, it has three runways and no airline service.
Pond's
Pond's, also sold as Ponds Cream, is an American-founded skincare brand dating to 1846, when pharmacist Theron T. Pond sold a witch hazel extract; Unilever acquired it in 1987.
Pondel
Pondel (Pont d'Aquel), a single-arch masonry aqueduct bridge in the Cogne Valley of Italy, was built in 3 BC and financed by Paduan entrepreneur Caius Avillius Caimus.
Pong Dam
Pong Dam, also called Beas Dam, is an embankment dam on the Beas River in Kangra district, Himachal Pradesh, India, completed in 1974 with a 396 MW powerhouse.