Low-temperature polycondensation of carboxylic acids and carbinols in heterogeneous media

Synthesis and characterization of a plant cutin mimetic polymer

“…The chemical reaction acting in the polycondensation of aleuritic acid is a low temperature esterification in an organic media in which the by-produced water molecule is transferred from the hydrophobic phase to the hydrophilic one. The free energy released in the transference becomes the driving force for the overall process [9]. The role of the catalyst is to trap water molecules from the reaction media and to prevent the inverse reaction of ester hydrolysis.…”

“…The polycondensation reaction between molecules of aleuritic acid was carried out similarly to the one described by Saam [9]. In a typical run, about 230 mg of aleuritic acid, 80 mg of the surfactant-type catalyst DBSA and 5 mL of toluene were introduced in a 50 mL erlenmeyer.…”

“…Previous progress in the biomimetization of cutin have been accomplished by its in vitro chemical synthesis from 9,16-dihydroxyhexadecanoic acid, the main monomer of tomato fruit cutin [8]. The process consists in a low temperature polycondensation reaction in a hydrophobic medium [9].…”

Microwave-Assisted Polyesterification Process in Bulk and Aqueous Media

“…The main advantage of this process is the transfer of the water formed in the hydrophobic organic phase to the aqueous phase. A kinetic study of the reaction allowed them to conclude that the hydrolysis takes place in the organic phase but this phenomenon is limited by the insolubility of water in the hydrophobic phase [9], [10].…”

Homopolymerization and copolymerization of a dilactone, 13,26‐dihexyl‐1,14‐dioxa‐cyclohexacosane‐2,15‐dione: Synthesis of bio‐based polyesters and copolyesters consisting of 12‐hydroxystearate sequences

“…Similar nature has been expressed by many aliphatic polyesters such as poly(3‐hydroxybutyrate) (PHB),7–9 poly(butylene succinate) (PBS),10 etc. However, little attention has been paid to poly(12‐hydroxystearate) (P(12HS)) that can readily be synthesized from 12‐hydroxystearic acid (12‐HSA) that is a long‐chain hydroxy fatty acid originated from castor oil 11–13. We previously demonstrated that the step‐growth polycondensation of 12‐HSA with tin oxide as the catalyst can give P(12HS) with high molecular weight ( M n = 31,000) 14.…”