Lipase-catalyzed solution polycondensation of 1,4-butanediol and diethyl succinate: Effect of diphenyl ether concentration on enzyme stability, reuse and PBS molar mass distribution

Enzymatic Synthesis of Hydroxy-Functionalized Glycerol-Based Polyesters: A Study of Functionalization, Regioselectivity Control, and Catalyst Reuse

“…Next, the filtrate (including the gel and soluble polymer fractions) was evaporated on a heating plate at 50 °C under stirring (200 rpm) to remove excess solvent. 36 Finally, the samples were taken to a forced convection oven (DL − AF, De Leo) and left for 72 h at a temperature of 60 °C to ensure total solvent evaporation. The same process was followed for all formulations shown in Table 1.…”

“…The final product obtained through enzymatic polycondensation was cooled and dissolved in chloroform to reduce the viscosity and remove N435 by vacuum filtration. Next, the filtrate (including the gel and soluble polymer fractions) was evaporated on a heating plate at 50 °C under stirring (200 rpm) to remove excess solvent . Finally, the samples were taken to a forced convection oven (DL − AF, De Leo) and left for 72 h at a temperature of 60 °C to ensure total solvent evaporation.…”

Enzymes in Poly(Butylene-Succinate) Industry: An Overview on Synthesis Routes and Post-Processing Strategies

“…This choice can be attributed to the higher specificity of the employed enzyme (commonly a lipase enzyme) towards esters and alcohols rather than towards acid substrates employed in the esterification. All equilibrium polycondensation reactions need an efficient removal system of the by-product [31]. Using diesters such as DES or DMS instead of dicarboxylic acids can shift the equilibrium towards the polymerization product because more volatile results (alcohols) are obtained concerning water.…”