Provided is a macromolecular material that has self-healing properties, excellent stretchability, and a high degree of freedom in the design of stretchability, strength, and hardness, and that can be produced by a simple method; and also provided is a method for producing the same. The macromolecular material of the present invention comprises a polymer having a host group and a guest group. The host group is a monovalent group formed by removing one hydrogen atom or hydroxy group from a cyclodextrin derivative. The polymer is a polymer of a monomer mixture containing a host group-containing polymerizable monomer, a guest group-containing polymerizable monomer, and a third polymerizable monomer, and the third polymerizable monomer contains a (meth)acrylic ester compound. The host group-containing polymerizable monomer and the guest group-containing polymerizable monomer have a property of being dissolved in the third polymerizable monomer.

Provided are supramolecular polypseudorotaxane hydrogel compositions and 3-D structures capable of reversible 3-D structural deformation which include (a) a solvent; (b) an at least partially linear polymer, where the polymer further comprises groups capable of covalent crosslinking between the polymers; (ii) at least one first macrocyclic ring which forms a pseudorotaxane with a polymer in the polymer network; and (iii) at least one second macrocyclic ring that does not form the pseudorotaxane. The hydrogel composition has a viscosity which allows for 3-D printing of the hydrogel to form a 3-D structure, and a storage (elastic) modulus after crosslinking that allows for the 3-D structure to undergo reversible 3-D structural deformation upon change of solvent conditions. Also provided are methods of manufacturing the compositions and 3-D structures.

A metallo-supramolecular polymer is formed by alternately linking metal cations and organic ligands through coordinate bonds, wherein a metallo-supramolecular polymer containing tris(terpyridine) compounds represented by a formula (B) and bis(terpyridine) compounds represented by a formula (L) as the organic ligands has high coloration efficiency.

Described herein are associative polymers capable of controlling a physical and/or chemical property of non-polar compositions and related compositions, methods and systems. Associative polymers herein described have a non-polar backbone and functional groups presented at ends of the non-polar backbone, with a number of the functional groups presented at the ends of the non-polar backbone formed by associative functional groups capable of undergoing an associative interaction with another associative functional group with an association constant (k) such that the strength of each associative interaction is less than the strength of a covalent bond between atoms and in particular less than the strength of a covalent bond between backbone atoms.

The disclosure provides a method for improving hydrogen adsorption performance of a covalent organic framework material, including the following steps: providing a covalent organic framework material including an imine bond; and placing the covalent organic framework material in hydrochloric acid vapor for protonation. The disclosure further provides a protonated covalent organic framework material, and use thereof as a hydrogen storage medium.

Described herein are associative polymers capable of controlling one or more physical and/or chemical properties of non-polar compositions and related compositions, methods and systems.

Disclosed in the present invention are a polyvinyl alcohol (PVA)-based degradable plastic, a preparation method therefor and application thereof, and a recycling method therefor. The preparation method comprises the following steps: a PVA solution is subjected to a chemical grafting reaction under an acidic condition under the action of a modifier; there are a phenyl group, an aldehyde group, and at least one group capable of forming a hydrogen bond with PVA in a structural formula of the modifier. The polyvinyl alcohol-based degradable plastic provided in the present invention has the advantages of being high in transparency, high in mechanical strength, not affected by environmental humidity, easy to degrade, good in thermal stability and good in biocompatibility, and has the advantages of recyclability, low costs, easy large-scale preparation and the like.

The invention relates to a supramolecular polymer comprising polymer chains according to Formula (I):

##STR00001##

wherein the average n in the supramolecular polymer is between 2 and 16, and wherein building block *-Q-* represents:

##STR00002##

wherein the average i in the supramolecular polymer is between 1.5 and 6.0, and wherein building block *-T-* represents:

##STR00003##

wherein the average j in the supramolecular polymer is between 1 and 6, wherein the supramolecular polymer has an average molecular weight M.sub.n of about 15 kDa to about 150 kDa, wherein POL is a linear hydrophilic polymeric group having an average molecular weight M.sub.n of about 1 kDa to about 30 kDa, wherein L and K represent linker groups and wherein A represents hydrogen bonding units.

The disclosure provides for methods and systems to create active supramolecular materials by using electrically fueled dissipative assembly, and applications thereof, including in electronic devices.

A method for enhancing the conductivity of MOF-5 by the development of an MOF-5 polymer composite material. The composite material incorporates a conductive polymer, preferably polyaniline, in the solvo-thermal synthesis pathway of MOF-5. The electrically conductive MOF-5 composite exhibits electric conductivity three orders of magnitude higher than that of MOF-5 while maintaining the crystallinity, robustness, and thermal stability of MOF-5.