A first process produces poly(glycerol sebacate) urethane (PGSU)-based microparticles. The first process includes forming a first composition including a poly(glycerol sebacate) (PGS) resin and dispersing the first composition in a continuous fluid phase in the presence of an isocyanate crosslinker to produce PGSU-based microparticles. A second process also produces PGSU-based microparticles. The second process includes forming a first composition including a PGS resin, forming a second composition and combining the first composition and the second composition to produce PGSU-based microparticles, where at least one of the first and the second composition includes an isocyanate crosslinker. An extrusion-spheronization process of crosslinking includes extruding an extrudate including a crosslinkable compound into a continuous fluid phase in a spheronization bath and dispersing the extrudate in the continuous fluid phase to crosslink the crosslinkable compound, where at least one of the extrudate and the continuous fluid phase includes a crosslinker.

An object is to provide a laminate having excellent lamination strength that includes a polyester film having a furandicarboxylate unit and a heat-sealable resin layer, and to provide a packaging bag including the same. A laminate including a polyester film and a heat-sealable resin layer, wherein the polyester film is a biaxially oriented polyester film containing a polyethylene furandicarboxylate resin composed of a furandicarboxylic acid and ethylene glycol, a plane orientation coefficient ΔP of the film is 0.100 or more and 0.160 or less, a thickness of the film is 1 μm or more and 300 μm or less, a heat shrinkage rate of the film is 10% or less when heated at 150° C. for 30 minutes, and lamination strength of the laminate is 2.0 N/15 mm or more.

The present invention relates to a biodegradable polyester resin, in which the first repeat unit comprising a first diol residue and an aromatic dicarboxylic acid residue and the second repeat unit comprising a second diol residue and an aliphatic dicarboxylic acid residue satisfy a ratio of the number of repeat units in a specific range, and the softness index of the resin satisfies a specific range, and to a process for preparing the same. Since the biodegradable polyester resin can provide a biodegradable polyester sheet or film that can be simultaneously enhanced in productivity, processability, and moldability and is excellent in tensile strength, tear strength, and friction coefficient and excellent in biodegradability and water degradability, it can be utilized in more diverse fields.

In some aspects, the present disclosure pertains to multi-arm polymers that comprise a core, a plurality of polymer segments having a first end that is covalently attached to the core and a second end comprising a moiety that comprises a reactive group, wherein the polymer segments comprise one or more free-radical-polymerizable monomers. In some aspects, systems are provided that comprise a first composition comprising such a multi-arm polymer and a second composition comprising a multifunctional compound that comprises functional groups that are reactive with the reactive groups of the multi-arm polymer. In some aspects, systems are provided that comprise crosslinked reaction products of such a multi-arm polymer and such a multifunctional compound.

Shape memory polymers and copolymers are based on poly(hydroxyalkanoates) (PHA) and have improved elastomeric properties. The shape memory polymers and copolymers may be used as protective, reinforcement, cladding or embellishment material having mechanical properties enabling substitution to materials based on technical polymers such as plasticized PVC and polyolefins.

Techniques regarding polymers with antimicrobial functionality are provided. For example, one or more embodiments described herein can regard a polymer, which can comprise a repeating ionene unit. The repeating ionene unit can comprise a cation distributed along a degradable backbone. The degradable backbone can comprise a terephthalamide structure. Further, the repeating ionene unit can have antimicrobial functionality.

Provided is a multilayer container including: a polyester layer containing a polyester resin (X); and a polyamide layer containing a polyamide resin (Y) and a yellowing inhibitor (A). The content of the polyamide resin (Y) is from 0.05 to 7.0 mass % relative to a total amount of all polyamide layers and all polyester layers, and the content of the yellowing inhibitor (A) is from 1 to 30 ppm relative to the total amount of all polyamide layers and all polyester layers. Also provided are a method for manufacturing the multilayer container, and a method for manufacturing a recycled polyester, the method thereof including a step of recovering polyester from the multilayer container.

To provide a layered polyester film having excellent mechanical properties, transparency, heat resistance, and in particular excellent gas barrier property. A layered polyester film containing a polyester film and a thin film layer including mainly an inorganic compound, wherein the polyester film is a biaxially oriented polyester film including a dicarboxylic acid component containing mainly a furandicarboxylic acid and a glycol component containing mainly ethylene glycol, the thin film layer is formed on at least one surface of the polyester film, the inorganic compound is at least one of aluminum oxide and silicon oxide, and the layered polyester film has a plane orientation coefficient ΔP of not less than 0.100 and not more than 0.200, a film thickness of not thinner than 1 μm and not thicker than 300 μm, and an oxygen permeability of not less than 0.1 mL/m.sup.2/day/MPa and not more than 80 mL/m.sup.2/day/MPa under a temperature of 23° C. and a humidity of 65%.

In various examples, methods of forming a polymer (e.g., a condensation polymer including but not limited to a polyester), include the steps of forming a mixture comprising one or more monomer(s), one or more biocatalyst(s), and carbon dioxide. In various examples, the methods are at least partially carried out in sub critical carbon dioxide or supercritical carbon dioxide. In various examples, a polymer is a condensation polymer. In various examples, a fabricated article, which may be a medical article, includes one or more polymer(s).

Degradable polymers, including polyurethane and polyurethane-urea compositions, that can be used in aqueous, non-aqueous and dry hot environments as degradable polymers in oil, gas and other applications.