Synthesis and Spectroscopic Analyses of New Polycarbonates Based on Bisphenol A-Free Components was written by Wnuczek, Krystyna;Puszka, Andrzej;Podkoscielna, Beata. And the article was included in Polymers (Basel, Switzerland) in 2021.Safety of Diphenyl carbonate The following contents are mentioned in the article:
This paper discusses a new synthesis of bisphenol A-free polycarbonates based on four aliphatic-aromatic systems. In the first stage, different types of monomers (with/without sulfur) derived from diphenylmethane were synthesized. Then, new polycarbonates were prepared in the reactions with di-Ph carbonate (DPC) by transesterification and polycondensation reactions. Three different catalysts (zinc acetate, 4-(dimethylamino)pyridine and benzyltriethylammonium chloride) were tested. The structures of the compounds were confirmed by Nuclear Mol. Resonance spectroscopy (NMR) in each stage. The chem. structures of the obtained polycarbonates were verified by means of Attenuated Total Reflectance Fourier Transform IR spectroscopy (ATR-FTIR). The presence of a carbonyl group in the IR spectrum confirmed polycarbonate formation. Thermal studies by differential scanning calorimetry (DSC) were carried out to determine the melting temperatures of the monomers. A gel permeation chromatog. anal. (GPC) of the polycarbonates was performed in order to investigate their molar masses. Thermal anal. proved the purity of the obtained monomers; the curves showed a characteristic signal of melting. The obtained polycarbonates were characterized as having high resistance to organic solvents, including THF. The GPC anal. proved their relatively large molar masses and their low dispersity. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Safety of Diphenyl carbonate).
Diphenyl carbonate (cas: 102-09-0) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Safety of Diphenyl carbonate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics