Dacron trade name

Dacron Trade name for PET fiber, draw Depth of mold cavity. 

The ethylene glycol liberated by reaction (5.L) is removed by lowering the pressure or purging with an inert gas. Because the ethylene glycol produced by reaction (5.L) is removed, proper stoichiometry is assured by proceeding via the intermediate, bis(2-hydroxyethyl) terephthalate otherwise the excess glycol used initially would have a deleterious effect on the degree of polymerization. Poly(ethylene terephthalate) is more familiar by some of its trade names Mylar as a film and Dacron, Kodel, or Terylene as fibers it is also known by the acronym PET. 

The most generally useful polyester is that made by reaction between dimethyl terephthalate (dimethyl 1,4-benzenedicarboxylate) and ethylene glycol (1,2-ethanediol). The product is used under the trade name Dacron to make clothing fiber and tire cord and under the name Mylar to make recording tape. The tensile strength of polyethylene terephthalate) film is nearly equal to that of steel. 

Perhaps the most important polyester is polyethylene terephthalate), commonly known as PET (or PETE 1 on plastic beverage bottles). The annual production of PET in the United States is of the order of 108 kg (105 metric tons). Much of this is converted into fabric (trade name, Dacron) or magnetically coated film (Mylar). 

This polymer is well known by a number of trade names, such as Dacron, its common grouping, polyester, and by an abbreviation, PET. 

Poly(ethylene terephthalate), known by the trade names Mylar, Dacron, and Terylene, is a very high volume polymer—the United States production of PET fiber and plastic was over... 

Like PET, which further became more and more popular under various trade names (Dacron in USA, Rhodergon in France, Dallon in Russia and European Eastern countries), PTFE was initially used as thread, which could be woven or knitted to obtain vascular prostheses. These resulting woven devices, in which two sets of threads, respectively called weft and warp, cross each other perpendicularly, are known to easily fray near anastomoses. For knitted devices, in... 

Polyethylene terephthalate) in short PET is a polyester. It is mainly used in the garment industry with or without natural cotton and has trade names such as Terylene , Dacron , etc. As the name indicates, it is a polymer between terephthalic acid (PT) and ethylene glycol. Both terephthalic acid and dimethyl terephthalate (DMT) can be used to make the polymer. A majority of the modem plants tend to use PT as the starting material because of the availability of high-purity PT on a large scale. Both PT and DMT are first converted to bis(hydroxy ethyl) terephthalate 8.17 (see reaction 8.26). For PT this is effected by a straightforward esterification reaction. For DMT a transesterification reaction catalyzed by zinc and manganese acetate is used. 

Polyester fibers, similar to polyamide fibers, represent another important family of fiber. Polyester fiber was discovered in England in 1941 and commercialized in 1950. Two common trade names of polyester are Dacron in the US and Terylene in the UK. The term polyester fiber represents a family of fibers made of polyethylene terephthalate. Dimethyl terephthalate is reacted with ethylene glycol in the presence of a catalyst, antimony oxide, to produce polyethylene terephthalate or polyester. The chain repeat structure of PET is given in Fig. 4.6. Although polyesters can be both thermosetting and thermoplastic, the term polyester has become synonymous with PET. Note that the PET chain structure is different from the simpler structure of nylon or polyethylene. In PET, the aromatic ring and its associated C-C bonds provide a rigidity to the structure. The polyester structure is also bulkier than that of nylon or polyethylene. These factors make polyester less flexible than nylon and polyethylene, and the crystallization rate of PET slower than that of nylon or polyethylene. Thus, when polyester is cooled from the melt, an appreciable amount of crystallization does not result. 

Polyesters constitute a second major class of condensation polymers. The most common polyester is polyethylene terephthalate (PET), which is sold under a variety of trade names (Dacron, Terylene, and Mylar) depending on its use. 

Further reaction then builds up the polymer, which is called polyester and sold under trade names such as Dacron. The planar benzene rings in this polymer make it stiffer than nylon, which has no aromatic groups in its backbone, and help make polyester fabrics crush-resistant. The same polymer formed in a thin sheet rather than a fiber becomes Mylar, a very strong film used for audio and video tapes. 

Further reaction and water removal from this system will ultimately give polyethylene terephthalate, well known commercially in fiber form as Dacron, or Terylene, and as a film by the Mylar trade name (Eq. 20.5). 

Commercial PET has a melting point of about 270°C. Thus, a fiber is produced from the bulk resin by melt spinning into a dry inert gas using a melt temperature of 280-300°C (Fig. 21.1). Fabrics woven from PET resin fibers include the well known Dacron, Fortrel, Crimplene, and Trevira trade names. Although fibers dominate PET processing, a substantial fraction is also blow... 

Polyesters are step-growth polymers in which the monomer units are joined together by ester groups. They have found wide commercial use as fibers, plastics, and coatings. The most common polyester is known by the trade name Dacron and is made by the transesterification (Section 17.10) of dimethyl terephthalate with ethylene glycol. High resilience, durability, and moisture resistance are the properties of this polymer that contribute to its wash-and-wear characteristics. 

Many of the silicone elastomers that are used in biomedical applications are produced by Dow Chemical Corp., under the trade name SILASTIC . For example, a typical medical-grade silicone (like SILASTIC MDX4-4210 Medical grade elastomer) contains, after curing, cross-linked drmethylsiloxane polymer and silica for reinforcement. Silcones are also reinforced with PET (Dacron) fiber meshes for certain biomedical applications. For implantable medical devices, it is important to realize that the cured polymer contains residual catalysts and silicone cross-linkers, which are necessary for the polymerization. 

A commonly used linear polyester is polyfethylene terephthlate) (PET), which is synthesized by condensation of terephthalic acid and ethylene glycol, and produced under the trade name Dacron,... 

Other examples of well-established trade names are Kevlar (poly(paraphenylene terephthalamide)), Plexy-glass (sheets of poly(methyl methacrylate)). Teflon (poly(tetrafluoroethylene)), and Dacron (PET fiber). 

Trade names and synonyms Cronar , Melinex Mylar , Teijin , Teonex , Tetoron , Dacron , Terylene ... 

Dacron DuPont s trade name for its family of thermoplastic polyester fiber made from PET. Available as filament, yarn, tow, and fiber fill. See medical applications. 

Mylar A themioplastic film that is produced from the polyester of ethylene glycol and terephthalic acid. The fiber made by this method is called Dacron. Mylar and Dacron are DuPont trade names. 

Polyethylene terephthalate (PET), known by the trade names Mylar, Dacron, and Terylene, has good mechanical strength up to 150-175°C as well as good chemical and solvent resistance. PET can be blended with cotton fiber to give better crease resistance, and it can also be used as tire cord, magnetic tape, and x-ray and photographic film, to name only a few applications. The structure is... 

Whinfield and W. Dickson, working at the Calico Printers Association (2,3). Other polymers pioneered by these workers included poly(l,3-propylene terephthalate), 3GT, poly(l,4-butylene terephthalate), 4GT, and the polyester from ethylene glycol and l,2-6is(4-carbox5 henoxy)ethane, known as CPE-2G or Fiber-0 (4). Of these materials, PET was selected for development as a melt-spinnable synthetic fiber, but commercialization was impossible until after the end of World War II. Eventually, when the various national economies were back on a peacetime footing, PET polymer and fibers derived from it were put into production. The whole market-driving force for polyester at this time was in the form of synthetic fibers. In the United Kingdom, the new material was manufactured by Imperial Chemical Industries Ltd. imder the trade name Terylene, while DuPont introduced it to the United States in 1953 as Dacron (see Polyesters, Fibers). 

An incredibly important issue in polymer chemistry is processing, the manner in which the crude polymer product is transformed into the final material used in applications. This is a topic best reserved for a chemical engineering textbook, but it should not be dismissed here, either. As an example, poly(ethylene terephthalate), which is considered the workhorse of the polyester industry, is used as both a fiber and a plaster under the trade names of Dacron and Mylar, respectively (look ahead to Figure 13.15 to see the structures). The processing procedure leads to the different properties and the ultimate applications. 

This polymer, polyethylene terephthalate (PET), exhibits multiple ester linkages and is therefore called a polyester. PET is sold under many trade names, including Dacron and Mylar . It is primarily used in the manufacture of clothing. There are many different kinds of polyamides and polyesters, serving a variety of purposes. Kevlar, for example, is stronger than steel and is used in bulletproof vests ... 

Polyesters are similarly made through the reactions of diacids with diols—simple Fischer esterification reactions that produce a polymeric structure. For example. Dacron and Mylar are trade names for different polyesters that are made from ethylene glycol... 

Trade names are also widely used in synthetic fibers. For example, polyethylene terephthalate is called Dacron polypropylene, polypropylene fiber polyacrylonitrile, Acrylon poly(vinyl chloride), chloro fiber and polyamide, nylon. The numbers following the word nylon have different meanings ... 

Dacron is the trade name for the condensation copolymer formed from ethylene glycol (a diol—a molecule with two alcohol groups) and para-terephthalic acid (a diacid- a molecule with two carboxy groups). The condensation reaction removes the hydrogen atom from the alcohol on one monomer and the OH group from the carboxy group on a second monomer, producing water. 

Polyethylene terephthalate (PET) is a synthetic polymer formed by the reaction of ethylene glycol (HOCH2CH2OH) and terephthalic acid. Because PET is lightweight and impervious to air and moisture, it is commonly used for transparent soft drink containers. PET is also used to produce synthetic fibers, sold under the trade name of Dacron. Of the six most common synthetic polymers, PET is the most easily recycled, in part because beverage bottles that bear the recycling code "1" are composed almost entirely of PET. Recycled polyethylene terephthalate is used for fleece clothing and carpeting. In Chapter 30, we learn about the preparation and properties of synthetic polymers like polyethylene terephthalate. 

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