Provided herein are compositions, devices, and systems comprising copolymers of an N-alkyl acrylamide residue and a polyester comprising citric acid, polyethylene glycol, and glycerol 1,3-diglycerolate diacrylate, and methods of use and manufacture thereof.

Provided herein are compositions, devices, and systems comprising copolymers of an N-alkyl acrylamide residue and a polyester comprising citric acid, polyethylene glycol, and glycerol 1,3-diglycerolate diacrylate, and methods of use and manufacture thereof.

In one or more embodiments, the present invention provides a low molecular weight, non-toxic, resorbable poly(ethylene glycol) (PEG)-block-poly(propylene fumarate) (PPF) diblock copolymers and poly(propylene fumarate) (PPF)-block-poly(ethylene glycol) (PEG)-block-poly(propylene fumarate) (PPF) triblock copolymers (and related methods for their making and use) that permits hydration for the formation of such things as hydrogels and has constrained and predictable material properties suitable for 3D printing and drug delivery applications. Using continuous digital light processing (cDLP) hydrogels the diblock and triblock copolymers can be photochemically printed from an aqueous solution into structures having a 10-fold increase in elongation at break compared to traditional diethyl fumarate (DEF) based printing. Furthermore, PPF-PEG-PPF triblock hydrogels have also been found in vitro to be biocompatible across a number of engineered MC3T3, NIH3T3, and primary Schwann cells.

In one or more embodiments, the present invention provides a low molecular weight, non-toxic, resorbable poly(ethylene glycol) (PEG)-block-poly(propylene fumarate) (PPF) diblock copolymers and poly(propylene fumarate) (PPF)-block-poly(ethylene glycol) (PEG)-block-poly(propylene fumarate) (PPF) triblock copolymers (and related methods for their making and use) that permits hydration for the formation of such things as hydrogels and has constrained and predictable material properties suitable for 3D printing and drug delivery applications. Using continuous digital light processing (cDLP) hydrogels the diblock and triblock copolymers can be photochemically printed from an aqueous solution into structures having a 10-fold increase in elongation at break compared to traditional diethyl fumarate (DEF) based printing. Furthermore, PPF-PEG-PPF triblock hydrogels have also been found in vitro to be biocompatible across a number of engineered MC3T3, NIH3T3, and primary Schwann cells.

A polyester polyol is synthesized through an esterification reaction with a sebacic acid by-product fatty acid as a raw material; wherein the sebacic acid by-product fatty acid is refined from a by-product produced during preparing a sebacic acid from a castor oil; the sebacic acid by-product fatty acid includes, in weight percentage: a palmitic acid 15-25%, a stearic acid 10-16%, an oleic acid 45-57%, and a linoleic acid 12-28%. A method for preparing the polyester polyol is provided, as well as a polyurethane controlled-release fertilizer envelope and a polyurethane controlled-release fertilizer. The sebacic acid by-product fatty acid is used as a raw material to synthesize the polyester polyol because of a low price. The prepared fertilizer has excellent envelope and controlled-release performance, product structure performance is stable, cost performance is high, and degradation performance is sufficient after being applied to soil.

Disclosed is a sealant film including at least a layer formed of a polyester as a superficial layer, in which the polyester contains 20 to 50 mol % of a 2,5-furandicarboxylic acid unit, 18 to 49.5 mol % of at least one diol unit selected from the group consisting of an ethylene glycol unit, a 1,3-propanediol unit, and a 1,4-butanediol unit, and 0.5 to 2.5 mol % of a diethylene glycol unit, the sealant film has a crystallinity of less than 14%, and the sealant film is a stretched film that exhibits a shrinkage ratio of 6% or more in a maximum shrinkage direction upon being allowed to stand at 125° C. for 20 seconds. This provides a sealant film superior in mechanical properties, especially tensile elongation, and also superior in heat sealability, non-adsorptivity, and gas barrier properties.

Disclosed is a sealant film including at least a layer formed of a polyester as a superficial layer, in which the polyester contains 20 to 50 mol % of a 2,5-furandicarboxylic acid unit, 18 to 49.5 mol % of at least one diol unit selected from the group consisting of an ethylene glycol unit, a 1,3-propanediol unit, and a 1,4-butanediol unit, and 0.5 to 2.5 mol % of a diethylene glycol unit, the sealant film has a crystallinity of less than 14%, and the sealant film is a stretched film that exhibits a shrinkage ratio of 6% or more in a maximum shrinkage direction upon being allowed to stand at 125° C. for 20 seconds. This provides a sealant film superior in mechanical properties, especially tensile elongation, and also superior in heat sealability, non-adsorptivity, and gas barrier properties.

An electrostatic image developing toner includes an amorphous polyester resin, a crystalline polyester resin, and C.I. Pigment Red 57:1, wherein a Net intensity N.sub.Mg of an Mg element, the Net intensity N.sub.Mg of being determined by X-ray fluorescence analysis, is 0.10 kcps or more and 0.40 kcps or less.

According to the present invention, a spontaneous-emission type photosensitive resin composition comprises a cardo-based binder resin comprising at least one repeating unit of chemical formula 1 to chemical formula 4.

According to the present invention, a spontaneous-emission type photosensitive resin composition comprises a cardo-based binder resin comprising at least one repeating unit of chemical formula 1 to chemical formula 4.