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  • Made
  • The back bones of common synthetic polymers such as polythene, polystyrene and poly acrylates are made up of carbon-carbon bonds, whereas hetero chain polymers such as polyamides, polyesters, polyurethanes, polysulfides and polycarbonates have other elements (e.g. oxygen, sulfur, nitrogen) inserted along the backbone. (wikipedia.org)
  • Film
  • On August 16, 2010, the Department of Commerce (the Department) published the preliminary results of the administrative review of the antidumping duty order on polyethylene terephthalate film, sheet, and strip (PET film) from Brazil for the period November 6, 2008, through October 31, 2009. (federalregister.gov)
  • See Polyethylene Terephthalate Film, Sheet, and Strip From Brazil: Preliminary Results of Antidumping Duty Administrative Review, 75 FR 49900 (August 16, 2010) ( Preliminary Results ). (federalregister.gov)
  • ethylene terephthalate
  • Similar to the ubiquitous poly(ethylene terephthalate), this polymer is prepared by the esterification of 1,3-propanediol (HO(CH2)3OH) with terephthalic acid (C6H4(COOH)2), or by transesterification of dimethyl terephthalate: C6H4(COOH)2 + HO(CH2)3OH → [O2CC6H4CO2(CH2)3)]n + 2 H2O C6H4(COOCH3)2 + HO(CH2)3OH → [O2CC6H4CO2(CH2)3)]n + 2 CH3OH This polymer has been commercialized as Sorona by DuPont. (wikipedia.org)
  • Kevlar
  • Poly-paraphenylene terephthalamide - branded Kevlar - was invented by Polish-American chemist Stephanie Kwolek while working for DuPont, in anticipation of a gasoline shortage. (wikipedia.org)
  • Kevlar (poly paraphenylene terephthalamide) production is expensive because of the difficulties arising from using concentrated sulfuric acid, needed to keep the water-insoluble polymer in solution during its synthesis and spinning. (wikipedia.org)