Polyethylene isophthalate

NPFC National Publications Forms PEI polyethylene isophthalate... 

Polyethylene isophthalate) Poly(a,a,a ,a -tetrafluoro-/ -xylylene) Poly(N-vinyl carbazole) Poly(/>phenylene-2,5-thiodiazole) Poly(ethylene terephthalate)... 

PET PBT polyethylene isophthalate (1981) -caprolactone Hydrolysis with lipase from Rhizopus arrhizus in a buffer at 37 °C [4, 79, 82]... 

Other Accelerators. Amine isophthalate and thiazolidine thione, which are used as alternatives to thioureas for cross-linking polychloroprene (Neoprene) and other chlorine-containing polymers, are also used as accelerators. A few free amines are used as accelerators of sulfur vulcanization these have high molecular weight to minimize volatility and workplace exposure. Several amines and amine salts are used to speed up the dimercapto thiadiazole cure of chlorinated polyethylene and polyacrylates. Phosphonium salts are used as accelerators for the bisphenol cure of fluorocarbon mbbers. 

IPA = Isophthalic acid, PEG = polyethylene glycol, RES = resorcinol, and TPA = terephthalic acid. 7 = diphenyl carbonate. 

EP-4 developed by ERDL is a very flexible polyester based on polyethylene glycol with molecular weight-200 (PEG-200), isophthalic acid (IPA) and maleic anhydride (MAn). Before its use, it is blended with styrene monomer (1 1) and cured at room temperature using cobalt naphthenate (as an accelerator) and methyl ethyl ketone (MEK) peroxide (as a catalyst). This meets the requirements of the main inhibitor and is used for inhibition of DB and CMDB propellants after the application of a barrier coat (generally a rigid polyester such as PR-3). However, it is observed during manufacture of EP-4 that there is a lot of batch-to-batch variation in properties in spite of the strict quality control measures adopted during its manufacture. 

Most polyesters (qv) are based on phthalates. They are referred to as aromatic-aliphatic or aromatic according to the copolymerized diol. Thus polyethylene terephthalate) [25038-59-9] (PET), poly(butyelene terephthalate) [24968-12-5] (PBT), and related polymers are termed aromatic-aliphatic polyester resins, whereas poly(bisphenol A phthalate)s are called aromatic polyester resins or polyarylates PET and PBT resins are the largest volume aromatic-aliphatic products. Other aromatic-aliphatic polyesters (65) include Eastman Kodak s Kodar resin, which is a PET resin modified with isophthalate and dimethylolcyclohexane. Polyarylate resins are lower volume specialty resins for high temperature (HDT) end uses (see HEAT-RESISTANT polymers). 

Terephthalic acid (benzene 1,4-dicarboxylate, TPA) and isophthalic acid (benzene 1,3-dicarboxylate, IPA) are reactive bi-functional acids used as monomers to make plastics and coatings. TPA is a starting material for polyethylene terephthalate (PET). TPA and IPA are used to make polyester lacquers and coatings including the internal coatings of food cans. 

A reaction kettle was charged with polyesterdiol (0.5 mol M 1000 daltons prepared from isophthalic acid, adipic acid and hexanediol), polyethylene glycol (0.05 mol Mw= 1500 daltons), and dimethylolpropanoic acid (1.25 mol) dissolved in methyl ethyl ketone. The mixture was heated to 80°C. When the reaction was completed the... 

More frequently, alkyd resins are described by a combined classification in terms of their oil length, the type of fatty acids, and any unusual ingredients. Such descriptions as an isophthalic, very long tall oil alkyd or a medium oil dehydrated castor-PE (the PE refers to pentaerythritol, not polyethylene) alkyd or a short oil lauric-benzoic alkyd would immediately project the general properties of the resin. 

Dimethyl isophthalate is used as a plasticizer and modifier for polyethylene terephthalate, PET, and as a reactive intermediate for optical plastics. 

Materials. High density polyethylene (HDPE) having different molecular weights, and specific gravity of 0.951 (Marlex 5202, HXM 50100, made by Phillips 66 Co), were used for extrusion applications. Polyamides used were a semicrystalline copolyamide of adipic acid, hexamethylene diamine and caprolactam, and a copolyamide containing isophthalic acid as well. An anhydride modified polyethylene (3-5) as an interlaminar adhesive/compatibilizer was also used. The combinations are generally included in "Selar" barrier materials supplied by E. I. du Pont de Nemours Co. 

CSPE chlorosulfonated polyethylene DAIP diallyl isophthalate... 

In standard classification for vinyl plastics used in biomedical applications, a plasticizer is specified with prefix letter The letter is followed by a number from 1 to 14 which characterizes the type of plasticizer (e g., 1 - none, 2 - adipic acid derivative, 3 -azelaic, 4 - benzoic, 5 - citric, 6 - isophthalic, 7 - myristic, 8 - phosphoric, 9 - phthalic, 10 - sebacic, 11 - terephthalic, 12 - poly ether, 13 - polyethylene glycol, 14 - polyesters, 999 - other). The second letter specifies secondary plasticizer (e.g., A - none, B - alkyl epoxy stearates, C - epoxidized tall oil, D - epoxidized soybean oil, E - epoxidized linseed oil, F - epoxidized sunflower oil, Z - other). This classification is used to guide design engineers. Classification is not applicable to long-term implants. If there is a conflict between provisions of this standard and detailed specification for a particular device, the latter takes precedence. 

Uglea et al. (32) fractionated polyethylene terephthalate-ethylene isophthalate copolymer with the coacervate extraction technique, that is, successive extractions of the precipitated polymer using a solvent/nonsolvent pair, with an increasing solvent amount in the next round of the extraction process. The fractioned samples were dissolved in phenol/TCE (3 2, wt/wt) at ambient, and the SEC was later run in TCE-nitrobenzene (95 5, vol/vol) at 100°C. Elevated temperature (lOOX) was used, probably to increase the solubility of the copolymers in the eluant. 

Polyethylene terephthalate -ethylene isophthalate copolymer Styragel columns T etrachloroethane/nitrobenzene (99.5 0.5) at 100°C Samples dissolved in phenol/tetrachloroeth ... 

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