Covalently linked linear polyethylenimine (PEI) clusters are provided that change conformation depending upon changes in counterion concentrations. The structures may be used for the storage, delivery, and/or transport of substances.

Carbon dioxide adsorbents are provided. The carbon dioxide adsorbents include a polymeric amine and a porous support on which the polymeric amine is supported. the polymeric amine consists of a polymer skeleton containing nitrogen atoms and branched chains bonded to the nitrogen atoms of the polymer skeleton. Each of the branched chains contains at least one nitrogen atom. the polymeric amine is modified by substitution of at least one of the nitrogen atoms of the polymer skeleton or the branched chains with a hydroxyl group-containing carbon chain.

Disclosed herein is a A polyalkanolamine including the structure of formula L1

[00001]${\left[{\text{A}}^{\text{L}}\right]}_{\text{n}}{\left[{\text{B}}^{\text{L}}\right]}_{\text{m}}$

wherein A.sup.L is B.sup.L is X.sup.L1, X.sup.L2, X.sup.L3 are independently selected from a C.sub.1 to C.sub.6 alkanediyl; Ar.sup.L is a 5 or 6 membered N-heteroaromatic ring system including from 1 to 4 N atoms, which may be unsubstituted or substituted by C.sub.1 to C.sub.6 alkyl; n is an integer of from 2 to 350; m is 0 or an integer of from 1 to 600; o is 1 or an integer of from 2 to 25; B.sup.L1 is a continuation of the backbone B.sup.L by branching; X.sup.L11, X.sup.L12, X.sup.L13 are independently selected from a C.sub.1 to C.sub.6 alkanediyl; X.sup.L21 is a C.sub.1 to C.sub.6 alkanediyl; and derivatives thereof obtainable by N-protonation, N-quaternization, substitution, or polyalkoxylation.

An ester containing benzoxazine monomer and to a process for synthesizing the monomer and to vitrimers obtained through the polymerization of the ester containing benzoxazine monomer. Also, a use of the vitrimer as a reversible adhesive, sealant, coating or encapsulating systems for substrates selected from the group consisting of a metal, polymer, glass and ceramic material

For example, a triazine ring-containing polymer containing a repeating unit structure represented by Formula (24) below,

##STR00001## wherein R.sup.102 represents a crosslinking group.

The present disclosure presents hydrogel compositions for use in the treatment of an ocular disorder (e.g., a retinal disease) and methods of treating an ocular disorder in a subject in need thereof with the hydrogel compositions. The hydrogel compositions can include hydroxyphenylpropionic acid (gelatin-HPA), hyaluronic acid-tyramine (HA-Tyr), a catalyzer (e.g., horseradish peroxidase (HRP)), a cell, a crosslinker (e.g., hydrogen peroxide), or any combination thereof. The methods include administering a therapeutically effective amount of a composition into an eye of the subject, wherein the composition includes any of the hydrogel compositions of the disclosure.

The present disclosure presents hydrogel compositions for use in the treatment of an ocular disorder (e.g., a retinal disease) and methods of treating an ocular disorder in a subject in need thereof with the hydrogel compositions. The hydrogel compositions can include hydroxyphenylpropionic acid (gelatin-HPA), hyaluronic acid-tyramine (HA-Tyr), a catalyzer (e.g., horseradish peroxidase (HRP)), a cell, a crosslinker (e.g., hydrogen peroxide), or any combination thereof. The methods include administering a therapeutically effective amount of a composition into an eye of the subject, wherein the composition includes any of the hydrogel compositions of the disclosure.

A curable composition containing more than 80% by weight of a blend of benzoxazines, wherein the blend includes (A) one or more multifunctional benzoxazines and (B) a liquid, non-halogenated monofunctional benzoxazine. This composition has been found to be stable at high temperatures, e.g. 180° C.-250° C., and suitable for making composite materials using conventional techniques such as prepregging and liquid resin infusion.

An etheramine mixture comprising one or more polyether diamines, methods for its production, and its use as a curing agent for epoxy resins. The etheramine mixture may also be used in the preparation of polyamides and polyurea compounds.

A catalytic carbon capture material is provided. The catalytic carbon capture material includes a microporous polymer including a Tröger's base moiety, and a transition metal is coordinated within the microporous polymer. The catalytic carbon capture material selectively captures carbon dioxide (CO.sub.2) and also is a catalyst that simultaneously converts the captured carbon dioxide into one or more carbon dioxide-based products. A method of making the catalytic carbon capture material and a method of selective carbon dioxide capture and conversion are also provided.