Synthesis and characterization of polyesters derived from glycerol and phthalic acid

Abstract

The production of polyester via polycondensation between glycerol and phthalic acid using dibutyltin dilaurate is reported. Three glycerol:phthalic acid molar ratio used for the bulk polymerization were: 2:2; 2:3 and 2:4. FTIR confirmed the esterification of glycerol by the acid for all the polymers. DSC indicated no crystallinity, although the XRD plots indicate a very incipient crystallinity for the polymers containing higher amounts of phthalic anhydride. Scanning electron microscopy results indicates high homogeneity for all the polymers prepared.

Effect of the Glycerol and Lignin Extracted from Piassava Fiber in Cassava and Corn Starch Films

“…Due to its good compatibility, glycerol is widely used as plasticizer for starch films. Additionally, glycerol improves processing and the flexibility of films 17,18 . This work establishes biotechnological strategies for the use of purified glycerol from biodiesel production with the intention to open future perspectives for plastic industries 8,18,19 .…”

“…Additionally, glycerol improves processing and the flexibility of films 17,18 . This work establishes biotechnological strategies for the use of purified glycerol from biodiesel production with the intention to open future perspectives for plastic industries 8,18,19 . This study aims to evaluate the chemical, mechanical and morphological properties of flexible thermoplastic films of cassava and corn starch, using glycerol and lignin as plasticizers and reinforcement.…”

Synthesis and characterization of polyesters from glycerol by-product of biodiesel production

“…14,17,18 The reagents with different molar ratios (Table 1) were added into a beaker, and heated to 160 °C under constant magnetic stirring. No substance was added as the function of catalyzing, initiating or terminating the reaction.…”

“…14 PBT is also used in plug-in connectors, connector strips, switching systems, housings for automatic cut-outs, capacitor pots, in coil formers, lamp parts, PC fans, power supply components, parts for electric drives, sheathing for waveguides and many other products and not least in vehicle electrical systems (ignition coil housing). 14 The preparation of polyesters from multi-functional phenols and phthalic acid gave rise to production of gas separation membranes with good selectivity coefficients. 15 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.…”

Influence of the nature of the chain breaker on the thermal stability of phthalic anhydride-based polyesters

“…Dicarboxylic acids most used in the synthesis of unsaturated polyesters are adipic acid, azelaic acid, phthalic anhydride, terephthalic acid, isophthalic acid, maleic anhydride, or mixtures thereof, etc., and a glycol, or various combinations of polyhydric alcohols such as monoethylene glycol, propylene glycol, butanediol, trimethylolpropane [6][7][8][9][10]. These variations in structure are designed to improve the quality of the final product and certain mechanical properties and resistance.…”