Techniques regarding the synthesis of one or more polymers through one or more ring-opening polymerizations conducted within a flow reactor and facilitated by one or more anionic catalysts are provided. For example, one or more embodiments can comprise a method, which can comprise polymerizing, via a ring-opening polymerization within a flow reactor, a cyclic monomer in the presence of one or more anionic organocatalysts.

The present invention describes a process of manufacturing biodegradable PET chips, comprising the steps of providing a purified terephthalic acid (PTA) in a predetermined quantity in a slurry tank; providing virgin monoethylene glycol (MEG) in a predetermined quantity in the slurry tank; transferring the combination of the slurry tank to an esterification reactor for esterification of the combination in the reactor at above 250° C. temperature which releases monomers; transferring the monomers from the esterification reactor to a polymerisation reactor; providing poly-catalysts such as, but not limited, to Ti-based catalyst, sb2O3 or any other suitable catalysts or combination thereof into the polymerisation reactor; and polymerization of the monomers in the polymerisation reactor at above 280° C. temperature, wherein an enzyme based composition is provided either at PTA/MEG stage or poly-catalyst stage or at other stages or combination thereof.

The invention relates to a method for the combined processing of at least two polymer melts selected from the group consisting of (M1), (M2) and (M3), wherein (M1) is a polymer melt comprising a terephthalate polyester (A1), (M2) is a polymer melt comprising a copolyester (A2) on the basis of terephthalic acid, at least one aliphatic, ω-dicarboxylic acid and at least one aliphatic 1,ω-diol, and (M3) is a polymer melt 0 comprising a copolyester (A3) on the basis of terephthalic acid, at least one polytetramethylene glycol and at least one aliphatic 1,ω-diol. The method comprises the alternating processing of the at least two polymer melts into at least one product selected from the group consisting of pellets (P1), fibers (P2), expanded particles (P3), preforms (P4) and articles (P5).

The present invention relates to a method for the combined production of at least two target products selected from the group consisting of (T1), (T2) and (T3), wherein (T1) is a terephthalate polyester, (T2) is a copolyester on the basis of terephthalic acid, at least one aliphatic 1,ω-dicarboxylic acid and at least one aliphatic 1,ω-diol, and (T3) is a copolyester on the basis of terephthalic acid, polytetramethylene glycoland at least one aliphatic 1,ω-diol.

A method of manufacturing bulked continuous carpet filament from recycled polymer. In various embodiments, the method includes: (1) reducing recycled polymer material into polymer flakes; (2) cleansing the polymer flakes; (3) melting the flakes into a polymer melt; (4) removing water and contaminants from the polymer melt by dividing the polymer melt into a plurality of polymer streams and exposing those streams to pressures below 25 millibars or another predetermined pressure; (5) recombining the streams; and (6) using the resulting purified polymer to produce bulked continuous carpet filament.

A method and a facility produce polylactide (PLA) by polymerization, in which a lactide mixture is mixed with at least one catalyst, is introduced into a modular planetary roller extruder and the finished PLA is then removed. The lactide mixture continuously passes through segments of the extruder. The course of the reaction is measured and controlled in the segments in a targeted manner such that the temperature can be set by heating and/or cooling. The pressure can be variably set depending on pressure values to be checked by a controllable gas extraction and/or a controllable extruder speed and/or static variability of the planetary rollers and/or a variable metering speed of the lactide mixture and/or a variable mixing ratio of the lactide mixture. Flammable gas is removed in an explosion-protected zone in a partial region of the extruder. Additives are introduced into the extruder during the rolling process.

The present invention is directed to continuous reaction processes for preparing a glycolide/L-lactide copolymer formulation by continuously introducing glycolide monomer, L-lactide monomer, initiator and optionally a catalyst into at least one continuous reactor vessel under dry nitrogen environment, wherein the monomers, initiator, and optional catalyst are mixed at a first lower temperature and then transferred to a second continuous reactor operating at a second higher temperature, and then exothermally reacting and maintaining at a steady state, the blend of glycolide monomer, lactide monomer, initiator and optional catalyst to produce a PLGA copolymer reaction product.

Systems for manufacturing bulked continuous carpet filament from polymer, where the systems are configured for: (1) passing polymer flakes through a crystalliers; (2) melting the polymer to create a first single stream of polymer melt; (3) separating the first single stream of polymer melt into multiple streams of polymer melt; (4) exposing the multiple streams of polymer melt to a pressure of between about 0 millibars and about 25 millibars in a chamber; (5) recombining the multiple streams of polymer melt into a second single stream of polymer melt; and (6) providing the second single stream of polymer melt to one or more spinning machines that are configured to form the second single stream of polymer melt into bulked continuous carpet filament.

Disclosed is a process to produce a purified vapor comprising dialkyl-furan-2,5-dicarboxylate (DAFD). Furan-2,5-dicarboxylic acid (FDCA) and an alcohol in an esterification zone to generate a crude diester stream containing dialkyl furan dicarboxylate (DAFD), unreacted alcohol, 5-(alkoxycarbonyl)furan-2-carboxylic acid (ACFC), and alkyl furan-2-carboxylate (AFC). The esterification zone comprises at least one reactor that has been previously used in an DMT process.

Provided herein are methods and systems for producing a thermally stable polylactone polymer comprising chain terminating the polymer with an end-capping agent to prevent scission of the polymer. Also provided is a thermally stable polylactone polymer wherein the polymer has a first end and a second end, wherein at least one of said first and second ends terminate in an end-capping agent.