what is polypropelene?
366575
Polypropylene or polypropene (PP) is a thermoplastic polymer, used in a wide variety of applications, including food packaging, textiles, laboratory equipment, automotive components, and polymer banknotes. An addition polymer made from the monomer propylene, it is unusually resistant to many chemical solvents, bases and acids. Its resin identification code is the number 5 surrounded by a recycling symbol, with the letters "P P" below.
10686
PTFE fluoropolymer resin was discovered by DuPont chemist Roy J. Plunkett in 1938. The same year, DuPont chemist Wallace H. Carothers invented nylon. The Teflon® trademark was registered to DuPont in 1945. Nylon was never registered as a trademark and was given to all to use.\n\nTeflon® fluoropolymer resin is used in the manufacture of DuPont branded nonstick coatings: Teflon®, SilverStone®, SilverStone® Xtra, SilverStone® Select, SilverStone® Professional and Autograph.\n\nTeflon® is used for O-ring gaskets and tape for the protective case housing the original Emancipation Proclamation, delivered in 1862 by U.S. President Abraham Lincoln.\n\nTeflon® has been involved in the U.S. space program since the program's infancy. When astronaut Neil Armstrong took his historic "giant leap for mankind" in 1969, the moon module included numerous applications involving Teflon® resin, including space suits and blankets, heat shields, insulation and cargo hold liners.\n\nTeflon® is used in many applications for computer chip manufacture because it is very inert and non-reactive. It's used in filters to keep air clean, in chip carriers, and virtually all tubing and piping in the semiconductor industry. DuPont Teflon® is the dominant brand used in the industry and DuPont has supplied Teflon® to that market since its inception.\n\nTeflon® was one of the discoveries cited when DuPont received the U.S. National Medal of Technology from U.S. President Bush in 1990 for its role in the development and commercialization of man-made polymers in the 20th century.\n\nAs a fiber, Teflon® is used to manufacture socks that reduce friction and blisters. These are especially crucial for diabetics, people with circulatory problems, geriatric needs, obesity and sensitive skin. They are made by Comfort Socks and were recently approved by the U.S. Food & Drug Administration.\n\nTechnology based on Teflon® also is used to repel dirt and spills from DuPont StainMaster® carpet, which is specially engineered to protect carpet from tracked in dirt and spilled food and drinks. As a result, carpets stay 40% cleaner, vacuum cleaner efficiency is increased and carpet looks new longer.\n\nPTFE fluoropolymer resin is listed in the Guinness Book of World Records as the world's most slippery substance.\n\nTeflon® is used to insulate thousands of miles of data communications cables because of its outstanding properties, heat and chemical resistance.\n\nOther unique uses of Teflon® include: wiper blades and refills, leashes, collars, harnesses and belts, nail enamel treatment (Sally Hansen), bicycle lubricants, hosiery (Teflon® is made as a fiber, too), among others.\n\nTeflon® is used to coat fiberglass fabrics for permanent architectural structures such as the Pontiac Silverdome in Detroit, Michigan, and the Orange Bowl at Syracuse University in Syracuse, New York.\n\nMajor fashion designers and brands that use Teflon® fabric protector include: Hugo Boss, Prada, Ralph Lauren, Nautica, Yeohlee, Kenneth Cole, Woolrich, Pendleton, Koret, The Gap, J. Crew, L.L. Bean, Eddie Bauer, Robert Allen Beacon Hill Fabrics and Lee Jofa Fabrics, among others.\n\nAs a liquid, Teflon® repels water and stains for the apparel, home fashions, furniture, and uniform markets. The Teflon® forms a molecular shield around each fiber, guarding them from oil and water-based stains, dust and soil. Undetectable by sight, smell or touch, Teflon® protects virtually all kinds of fabrics — silk, wool, wool-blends, cotton, linen, velvet, heavy wovens, microfibers and both smooth and rugged fabrics — without affecting their color, feel or breathability.\n\nTeflon® industrial coatings can be used on carbon steel, aluminum, stainless steel, steel alloys, brass and magnesium, as well as non-metallics such as glass, fiberglass, some rubber and plastics. The versatility of these coatings allows almost unlimited application to a wide variety of part sizes and con
467259
Polyvinyl Choloride.  It;s a widley used type of plastic, perhaps most commonly found in costruction with "PVC Pipes".
667381
Polyethylene terephthalate (aka. PET, PETE, PETP) is a thermoplastic resin of the polyester family that is used to make beverage, food and other liquid containers, synthetic fibers, as well as for some other thermoforming applications. It is also one of the most important raw materials used in man-made fibers. Depending on its processing and thermal history, it may exist both as an amorphous (transparent) and as a semi-crystalline (opaque and white) material. It can be synthesized by a transesterification reaction between ethylene glycol and dimethyl terephthalate. It is manufactured under trade names Arnite, Impet and Rynite, Hostaphan, Melinex and Mylar films, and Dacron, Terylene & Trevira fibers
515270
Polybutylene terephthalate (PBT) is a plastic that is used as an insulator in the electrical and electronics industries. It is a thermoplastic crystalline polymer, and a type of polyester. PBT is resistant to solvents, shrinks very little during forming, is mechanically strong, heat-resistant up to 150°C (or 200°C with glass-fibre reinforcement) and can be treated with flame retardants to make it noncombustible.
151141
alkenes like ethene,propene undergo addition reactions at high temperatures and pressures to form addition polymers like polythene,PVC etc.\nalkenes like ethene are used in artificial ripening of fruits.
787181
Thru the hyperdeminsional cell structure of the base fiber lead in that causes the hermitcis percillium to react in an osmosis retention and propolsion effect which dilutes the potended ethylene compond saturation, and therefore transforms the base ethephon into active ingredient ethylene. \n\nGood question, \n\nDarryl S.
1059446
Thermoplastic will melt, and can be remolded\nThermoset will NOT melt once molded. This is what you see plastic ashtrays made of to withstand the heat of a cigarette.\n\nEasy Wikipedia search\n\nhttp://en.wikipedia.org/wiki/Thermoplastic\nFrom Wikipedia, the free encyclopedia\n\nA thermoplastic is a material that is plastic or deformable, melts to a liquid when heated and freezes to a brittle, glassy state when cooled sufficiently. Most thermoplastics are high molecular weight polymers whose chains associate through weak van der Waals forces (polyethylene); stronger dipole-dipole interactions and hydrogen bonding (nylon); or even stacking of aromatic rings (polystyrene). Thermoplastic polymers differ from thermosetting polymers (Bakelite; vulcanized rubber) which once formed and cured, can never be remelted and remolded. Many thermoplastic materials are addition polymers; e.g., vinyl chain-growth polymers such as polyethylene and polypropylene\n\n===== ===== ===== ===== ===== ===== ===== \n\nhttp://en.wikipedia.org/wiki/Zylon\nZylon\nFrom Wikipedia, the free encyclopedia\n\nZylon is a trademarked name for a range of thermoset polyurethane materials manufactured by the Toyobo Corporation. These are members of the synthetic polymer family of materials.\n\nIUPAC name: poly(p-phenylene-2,6-benzobisoxazole)\n\nThe particular subset that Zylon is derived from are the EBXL-TPU plastics. (From electron beam cross-linked ThermoPlastic Polyurethane).\n\nVaguely related to Kevlar and nylon, Zylon is used in a number of applications that require very high strength with excellent thermal stability. Tennis racquets, Table Tennis blades, various medical applications, and some of the martian rovers are some of the more well known instances.
283427
Propylene oxide (PO), in the form of its aqueous solution\n\nyou should search Google for exact matches by enclosing in quotes such as "po solution" or using advanced search
33242
You are probably referring to a "molecular sieve".  It's a bit of a misnomer.  A molecular sieve is a substance, usually a clay or ceramic, which is extremely porous and which is usually hydorphilic.  Typically it is used to dry solvents, or to extract water from organic liquids.  The surface of the molecular sieve is highly polar, usually because of the presence of a lot of hydroxyl groups.  The water hydrogen bonds to the hydroxyl groups in the molecular sieve, effectively drying toe organic solvent.  Usually the molecular sieve is sold in the form of small, cylindrical pellets, although sometimes you can find it in powder form.
644146
Diffusion control plays a crucial role in a major commercial process for the production of para-xylene.  The fundamental aspects of this process will be discussed.  Diffusion control is also used in a commercial kinetic based oxygen/nitrogen PSA separation.  Recent work has shown high potential for the kinetic based separation of propene from propane using zeolites.
339668
Terephtalic acid (TPA) (or 1, 4-dicarboxyic benzene) is made from 1, 4- dimethylbenzene (or para-xylene). The xylene is oxidized using a catalyst to yield TPA. The xylene is a petrochemical isolated from crude oil.\n\nTPA is then reacted with ethylene glycol to produce the polyester,  first prepared by DuPont and sold under the name DACRON.
740807
Dupont is a global leader in polymers.  They are a good place to start, and their website can refer you to their distributors.
285749
Well i can't paste that on here for you...but consult this link; http://www.abb.com/GLOBAL/NOOFS/noofs187.nsf/viewunid/713C646EB0A24CCBC12569EE0036977F/$file/PS.pdf#search='MAKING%20POLYSTYRENE%2C%20process%20flow%20diagram'\n\nIf u can't access via the above link, go to http://www.search.abb.com Then type 'making polystyrene' or :PS Web 2001" Folow the first link...its a pdf file.
399128
Polythene bags..\n\nethylene on polymerization will give polythene material..\n\nThats it!
90544
polymere's and resins
65818
Acetyl resin is a kind of plastic which softens when heated and hardens upon cooling.. They are formed by polymerization (a chemical process) of formaldehyde (colorless poisonous gas). Numerous uses in many industries.