PET polyethylene

PET = polyethylene terephlhalene SEES = styrene-ethylene butylene-styrene PSO = polysulfone. For other abbreviations see text. 

PBT - polybutylene terephthalate PDMS - polydimethyl siloxane rubber PE - polyethylene PET - polyethylene terephthalate PHB - poly[D(-)]-3-hydroxy butyrate PP - polypropylene... 

DuPont Acetal EVA Nylon 6, 6/6, 6/12, Mineral Filled 6/6, Industrial PBT PET Polyethylene Modified Thermoplastic Elastomer Ionomer Liquid Crystal Polymer ... 

NPII National Printing Ink Institute PET polyethylene terephthalate... 

Polyesters, The healthiest trend coming out of the plastics industry— personal health, that is—is the ubiquitous PET water bottle. Medical doctors all agree that the increased daily consumption of water enhances well-being. The improvement in producing PET, polyethylene terephthalate, in the 1970s, led to this pervasive replacement of glass bottles because of the cost and portability. 

Polyester is the Madison Avenue name for PET, polyethylene terephtha-late. Be careful, though, because PET is not a polyethylene-type chemical— its a xylene derivative. If you remember that esters usually end in -ate and are based on the acid from which they are derived, then you can see that the ester in polyester is ethylene terephthalate. 

Since the early 1970s p-xylene has grown to become a large volume petrochemical. It is used primarily for the production of polyester fibers, films and resins, such as PET (polyethylene terephthalate) [7]. Demand for p-xylene has increased tenfold since 1970 to about 26xl0 t/year. Almost all of this additional production has been by the UOP Parex process as shown in Figure 7.1. A baseline production ofp-xylene is maintained by crystallization based sites that existed before the SMB adsorptive separation technology was established [8]. 

Polymer coatings on stiffer substrates can be measured by time-resolved techniques (Sinton et al. 1989). Often in these cases it is not convenient to measure a direct reflection from an uncoated part of the substrate at more or less the same time, and anyway the substrate may not be flat, but this may not matter if it can be assumed that either the thickness or the longitudinal velocity of the coating does not vary. The time interval between the echoes from the top and bottom surfaces of the coating can then be used to determine the unknown quantity. An example of the kind of signal that can be obtained is shown in Fig. 10.5. The specimen was a coating of PET (polyethylene terephthalate) 15 m thick on a stone-finish rolled steel substrate. Although there is some overlap of the two echoes, there is no difficulty in... 

ABS = Acrylonitrile Butadene Styrene PA = Polyamide PAN = Polyacrylonitrile PBT = Polybbutylene Terephthalate PE= Polyethylene PET = Polyethylene Terephthalate PP = Polypropylene PUR = Polyirethane PVC = Polyvinyl chloride UPE = Un saturated polyester XPE = Cross-linked polyethylene ... 

The raw materials for the syntheses of materials are often found in nature or made in the laboratory. In the case of plastics, petroleum products form the starting point and through some synthesis reactions these can be converted into the raw material for a polymer, the main component of plastics. For example for the synthesis of PET (polyethylene terephthalate) of the well-known PET bottles, you need... 

Whereas UL 94 delivers only a classification based on a pass-and-fail system, LOI can be used to rank and compare the flammability behavior of different materials. In Figure 15.2 the increasing LOI values are presented for different polymers as an example POM = poly(oxymethylene), PEO = poly(ethyl oxide), PMMA = poly(methyl methacrylate), PE = polyethylene), PP, ABS, PS, PET = polyethylene terephthalate), PVA = poly(vinyl alcohol), PBT, PA = poly(amide), PC, PPO = poly(phenylene oxide), PSU, PEEK = poly(ether ether ketone), PAEK = poly(aryl ether ketone), PES, PBI = poly(benzimidazole), PEI = poly(ether imide), PVC = poly(vinyl chloride), PBO = poly(aryl ether benzoxazole), PTFE. The higher the LOI, the better is the intrinsic flame retardancy. Apart from rigid PVC, nearly all commodity and technical polymers are flammable. Only a few high-performance polymers are self-extinguishing. Table 15.1 shows an example of how the LOI is used in the development of flame-retarded materials. The flame retardant red phosphorus (Pred) increases... 

Figure 5-12 (a) Raman spectra, (b) Second-derivative spectra. HDPE, high-density polyethylene LDPE, low-density polyethylene PVC, polyvinyl chloride PP, polypropylene PS, polystyrene PET, polyethylene terephthalate. (Reprinted with permission from Ref. 4.)... 

FIG. 2 Bovine serum albumin adsorption to different polymer surfaces at 37°C in phosphate-buffered solution. The initial albumin concentration is 3 mg/ml. PVA poly(vinyl alcohol), PMMA poly(methyl methacrylate), PET polyethylene therephthalate), PP polypropylene, HDPE high-density polyethylene, PTFE polytetrafluoroethylene. (From Ref. 1.)... 

PC = polycarbonate PET = polyethylene terephthalate) PEEK = poly (aryl-ether-ether-ketone) PO = poly(oxy-1,4-pheny lene) PPS = poly (thio-l,4-phenylene) PPO = poly(oxy-2,6-dimethyl-l,4-phenylene) PEN = poly(ethylene-2,6-naphthalenedicarboxylate) PBT = poly... 

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