Roslaniec, Z. [ Links ], 22. MATERIALS AND METHOD: Phthalic acid, propane-1, 2-diol and glycerol were Polarographic determination of phthalic acid in linear polyesters . Therefore, the production of polyesters from glycerol and phthalic acid should produce new materials for the preparation of desalination membranes and as modifiers for polyurethane foams. Willey-VCH, Weinheim Chapter 8; 2005. p.227237. These aromatic dicarboxylic acids are used as precursors (in the form of acylchlorides) to commercially important polymers. Pt-Ru nanoparticles supported on carbon nanotubes as methanol fuel cell catalysts. InnovaTek (USA) has already used its technology to produce hydrogen from glycerol (a by-product of biodiesel production), and the raw soybean oil that is used to manufacture the biodiesel fuel6. Designed Monomers and Polymers, Vol. The high-performance polymer polybenzimidazole is produced from isophthalic acid. Thermal stability of poly(trimethylene terephthalate). Grande JA. The largest markets for phthalic anhydride are phthalate plasticizers, unsaturated polyester resins, and alkyd resins for surface coatings. The unsaturated acid provides sites for cross-linking at the curing stage. Phthalic acid, dibutyltin dilaurate (10 wt. Phthalic Anhydride (PA) is used as the major ingredient in the manufacture of plasticizers, unsaturated polyester resin, paint and others. Furthermore, the development of new elastomers derived from PBT (or PET) and poly(tetramethylene oxide) (also poly(dimethyl siloxane)), which combine the processability of the thermoplastics and the good mechanical properties of the elastomers have been investigated for decades15-19. Three glycerol:phthalic acid molar ratio used for the bulk polymerization were: 2:2; 2:3 and 2:4. Kirk-Othmer Encyclopedia of Chemical Technology. b) 40 - 98 % by weight of diethylene glycol. Synthesis and characterization of polyesters derived from glycerol and phthalic acid, Danilo Hansen GuimarãesI; Michel de Meireles BrioudeI; Raigens da Paz FiúzaI; Luis Antônio Sanches de Almeida PradoII; Jaime Soares BoaventuraI; Nadia Mamede JoséI, *, IPrograma de Pós-graduação de Engenharia Química, Instituto de Química, Universidade Federal da Bahia, Campus de Ondina, 40170-290 Salvador - BA, Brasil IIInstitute of Polymer and Composites, Technische Universität Hamburg, Harburg. XRD results evidenced that an incipient crystallinity of the materials could be attained for the polyester containing higher amounts of phthalic acid. Water-soluble polyesters are used in a range of applications today and enter wastewater treatment plants after product utilization. [ Links ], 25. The main degradation mechanism of polyesters having high molecular weight is the formation of alkenes, through b-elimination24-27, the trans-esterification and the rearrangements involving the end-groups play also a decisive role on the thermal stability of polyesters28. Keywords: polyester, glycerol, phthalic acid . 3. Major manufacturers of unfilled and filled semi-aromatic polyesters are SABIC, DuPont, Invista, BASF and Celanese. The reaction can be represented as follows: The reaction can be represented as follows: When an unsaturated oil such as tung oil , linseed oil, or dehydrated castor oil is added to the ester -forming compounds , the result is a branched polyester containing fatty-acid side groups. Paper Synthesis of unsaturated polyester resin — effect of anhydride composition ABDEEN AHAMAD, MARY … In this context, bio-diesel achieves many of the requirements, since its combustion produces no toxic gases like sulphur oxides, nitrogen oxides are produced during its combustion. The production of polyester via polycondensation between glycerol and phthalic acid using dibutyltin dilaurate is reported. Poly(alkylene naphthalate terephthalate). FTIR confirmed the esterification of glycerol by the acid for all the polymers. The heating rate was 20 °C/min. The POLF polymers are less stable than other polyesters obtained from aromatic carboxylic acids (terephthalic esters, naphthalenedicarboxylic esters), which are stable at temperatures up to 426 °C21-23. Materials Phthalic anhydride (PA) and maleic anhydride (MA) were supplied by … About product and suppliers: Alibaba.com features the best in class iso phthalic acid that are highly pure, colorless and safe to use. 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