The invention relates to an integrated process for producing a polyglycolic acid product, including polymerization, modification and molding. The resulting polyglycolic acid product may maintain the physical and chemical properties of polyglycolic acid to the greatest extent, including yellowness index (YI), weight-average molecular weight, strength and mean square radius of rotation. Also provided are the polyglycolic acid product and apparatus for carrying out the integrated process.

The invention relates to an integrated process for producing a polyglycolic acid product, including polymerization, modification and molding. The resulting polyglycolic acid product may maintain the physical and chemical properties of polyglycolic acid to the greatest extent, including yellowness index (YI), weight-average molecular weight, strength and mean square radius of rotation. Also provided are the polyglycolic acid product and apparatus for carrying out the integrated process.

The present invention describes a manufacturing method for a glycol-modified polyethylene terephthalate and an application for which. The manufacturing method includes the following steps. A reaction mixture is provided. The reaction mixture includes terephthalic acid, ethylene glycol, 1,4-cyclohexanedimethanol and an aqueous titanium-based catalyst. An esterification reaction and a polycondensation reaction is performed to the reaction mixture to obtain the glycol-modified polyethylene terephthalate.

The present invention describes a manufacturing method for a glycol-modified polyethylene terephthalate and an application for which. The manufacturing method includes the following steps. A reaction mixture is provided. The reaction mixture includes terephthalic acid, ethylene glycol, 1,4-cyclohexanedimethanol and an aqueous titanium-based catalyst. An esterification reaction and a polycondensation reaction is performed to the reaction mixture to obtain the glycol-modified polyethylene terephthalate.

Provided herein are absorbent polymers produced from beta-propiolactone, and methods and systems of producing such polymers. The beta-propiolactone may be derived from ethylene oxide and carbon monoxide. The absorbent polymer may be bio-based and/or biodegradable. The absorbent polymers may be used for diapers, adult incontinence products, and feminine hygiene products, as well as for agricultural applications.

Provided herein are absorbent polymers produced from beta-propiolactone, and methods and systems of producing such polymers. The beta-propiolactone may be derived from ethylene oxide and carbon monoxide. The absorbent polymer may be bio-based and/or biodegradable. The absorbent polymers may be used for diapers, adult incontinence products, and feminine hygiene products, as well as for agricultural applications.

The present disclosure relates to a liquid crystal polyester composition that can be injection molded into an ultra-thin film and has improved fluidity, and a manufacturing method thereof. The polyester resin composition for ultra-thin injection molding includes 60 to 85% by weight of a liquid crystal polyester resin and 15 to 40% by weight of an inorganic filler having an average cross-sectional aspect ratio of 2 to 6, based on the total weight of the composition, wherein the liquid crystal polyester resin includes 0.1 to 10 mol % of hydroxybenzoic acid (HBA), 40 to 60 mol % of hydroxynaphthoic acid, 20 to 30 mol % of biphenol, and 20 to 30 mol % of terephthalic acid. The liquid crystal polyester resin composition for ultra-thin injection molding according to the present disclosure not only has excellent mechanical strength and heat resistance, but also can exhibit very excellent fluidity in a high-speed injection process.

The present disclosure relates to a liquid crystal polyester composition that can be injection molded into an ultra-thin film and has improved fluidity, and a manufacturing method thereof. The polyester resin composition for ultra-thin injection molding includes 60 to 85% by weight of a liquid crystal polyester resin and 15 to 40% by weight of an inorganic filler having an average cross-sectional aspect ratio of 2 to 6, based on the total weight of the composition, wherein the liquid crystal polyester resin includes 0.1 to 10 mol % of hydroxybenzoic acid (HBA), 40 to 60 mol % of hydroxynaphthoic acid, 20 to 30 mol % of biphenol, and 20 to 30 mol % of terephthalic acid. The liquid crystal polyester resin composition for ultra-thin injection molding according to the present disclosure not only has excellent mechanical strength and heat resistance, but also can exhibit very excellent fluidity in a high-speed injection process.

In one or more embodiments, the present invention provides am method of making a poly(propylene fumarate-co-succinate) (PPFS) copolymer containing a random incorporation of succinate groups and targetable reduction profiles without the need for three or more monomer units. To achieve this, a time-dependent sonication-promoted zinc/acetic acid reduction of the PPM unsaturated double bonds has been used to create a random PPMS copolymer which may be isomerized into the PPFS equivalent. By changing the sonication time as well as the ratios of acetic acid, zinc, and PPM unsaturated alkenes, partial reduction of the PPM alkenes has been shown to give PPMS products containing varying compositions of succinic and maleate units, which may then be isomerized to the PPFS product.

In one or more embodiments, the present invention provides am method of making a poly(propylene fumarate-co-succinate) (PPFS) copolymer containing a random incorporation of succinate groups and targetable reduction profiles without the need for three or more monomer units. To achieve this, a time-dependent sonication-promoted zinc/acetic acid reduction of the PPM unsaturated double bonds has been used to create a random PPMS copolymer which may be isomerized into the PPFS equivalent. By changing the sonication time as well as the ratios of acetic acid, zinc, and PPM unsaturated alkenes, partial reduction of the PPM alkenes has been shown to give PPMS products containing varying compositions of succinic and maleate units, which may then be isomerized to the PPFS product.