The invention relates novel polyglycolide copolymers comprising a colorant. The copolymers may have a weight-average molecular weight (Mw) in the range of 10,000-1,000,000, a ratio of a weight-average molecular weight to a number-average molecular weight (Mw/Mn) in the range of 1.0 to 4.0, and a yellowness index (YI) is the range of 40-90. The copolymers may have a melt index (MFR) in the range of 0.1 to 1000 g/10 min. The copolymers may have a stable yellowness index, good thermal stability and aging resistance. Also provided are a process for preparing the copolymers and a method for reducing yellowness index change rate of a polyglycolide copolymer.

The present technology relates to a polymer comprising at least one ester repeating unit and one ether repeating unit for use in an electrochemical cell, particularly in electrochemical accumulators such as lithium batteries, sodium batteries, potassium batteries and lithium-ion batteries. More specifically, the use of this polymer as a solid polymer electrolyte (SPE), as a matrix for forming gel electrolytes, or as a binder in an electrode material are also contemplated.

Esters of polylactic acid, including polyethylene glycol esters of polylactic acid, and esters of polyglycolic acid are disclosed. Exemplary esters of polylactic acid and/or esters of polyglycolic acid can be used as textile finishes. Methods of making the esters of polylactic acid via direct and transesterification reactions are also disclosed.

A novel polymer is provided by polymerization of xylitol and dodecanedioic acid. The polymer, poly(xylitol-dodecanedioic acid) or PXDDA, shows high elasticity. PXDDA significantly improves cell adhesion and promotes cell proliferation compared to an FDA-approved polymer, poly(lactic acid), and tissue-culture plates. PXDDA can be synthesized by a simple melt condensation polymerization without the use of any toxic catalysts.

Provided is a lactic acid-based block copolymer which is biodegradable while having excellent mechanical properties.

A solvent-free adhesion-promoting chain extender, a preparation method therefor, and an application thereof are disclosed. The method includes the following steps: mixing an aromatic vinyl monomer, an acrylate-based monomer, an initiator, and water, then heating the mixture for polymerization, and subjecting the product to a secondary reaction by a twin-screen extruder for granulation, to prepare the extender. The obtained epoxy functionalized chain extender can be applied to a recycled material of a polyester structure and can be used for the repair and growth of molecular chains of biobased and biodegradable plastics of a polyester structure. The method features no use of a solvent in a process route, low investment, easily available apparatuses, low emission in the process route, and simple process control; in addition, the product has stable composition and is easy to use, and thus can be widely used, such as medical treatment, packaging, home appliances, automobiles, and aviation.

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 invention relates to a dispersant derived from an alcohol terminated polymer and via an anhydride intermediate. The anhydride functionalized polyester is then reacted with a multi-amine species forming amide and salt bonds.

The disclosure relates to a recyclable polyester composition including a polyester, an epoxide compound, and optionally a capping agent. The epoxide compound can be a sterically hindered epoxide and/or a polyfunctional epoxide. The capping agent can be selected and included based on its ability to react with in situ-generated hydroxy groups resulting from reaction with the polyester and the epoxide compound. The capping agent is included when the epoxide compound is a polyfunctional epoxide in order to control or limit branching during chain extension. The inclusion of the epoxide compound provides a controlled chain extension of the polyester subjected to thermal processing in a way that controls, limits, or prevents branching and crosslinking, but which also increases polymer molecular weight in a manner that offsets the molecular weight reduction associated with thermal processing in the absence of the disclosed epoxide compounds.

The present invention provides a dispersion composition from which a curable composition having excellent developability can be obtained and in which generation of precipitates under a low temperature environment is suppressed. In addition, the present invention provides a curable composition, a light-shielding film obtained by curing the curable composition, a color filter containing a cured film obtained by curing the curable composition, a solid-state imaging device and an image display device, a resin, and a method for manufacturing a cured film. The dispersion composition of the present invention contains a colorant and a resin, in which the resin contains a structural unit A having a polymer chain and a structural unit B having an acid group, and the polymer chain contains 2 or more structural units GF, and the structural unit GF is selected from the group consisting of a structural unit composed of an oxyalkylene group and a structural unit composed of an oxyalkylene carbonyl group.