Disclosed herein in various embodiments are aryl-ether free polyaromatic polymers based on random copolymer architecture with two, three, or more aromatic ring components and methods of preparing those polymers. The polymers of the present disclosure can be used as ion exchange membranes, e.g., as anion exchange membranes, and ionomer binders in alkaline electrochemical devices.

The present disclosure relates to a coating method of implant using parylene, for coating a surface of a dental implant, including a pretreating step of pretreating the implant; and a coating step of coating a surface of the pretreated implant with a coating material to form a polymer coating layer, wherein the coating material is provided as parylene.

A material for forming a film for a semiconductor provides a film having excellent heat resistance and solvent resistance. It contains: a compound represented by general formula (I) and having at least one reactive group, or a polymer including, as a monomer, a compound represented by general formula (I) below and having at least one reactive group; and a solvent. In the formula, A represents a hydrocarbon ring having 6 carbon atoms, X.sup.1 and X.sup.2 each represent an aryl group having 6-30 carbon atoms and optionally substituted by a reactive group or a group having a reactive group. R.sup.1-R.sup.4 and R.sup.6-R.sup.9 each represent a hydrogen atom, a hydrocarbon group having 1-20 carbon atoms and optionally substituted by a reactive group or a group having a reactive group. R.sup.5 and R.sup.10 each represent a hydrogen atom, a hydrocarbon group having 1-20 carbon atoms and optionally substituted by a reactive group.

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Deuterated anion exchange polymers, methods of making the deuterated anion exchange polymers, anion exchange membranes comprising the deuterated anion exchange polymers, and membrane electrode assemblies comprising the deuterated anion exchange polymers are described. The deuterated anion exchange polymers comprise a plurality of repeating units of formula (I)

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A biodegradable aliphatic polyester which is a reaction product of a functional Michael acceptor and a functional Michael donor, wherein the functional Michael acceptor comprises R.sup.1(A).sub.n and the functional Michael donor comprises R.sup.2(D).sub.m, wherein A is a functional Michael acceptor moiety, D is a functional Michael donor moiety, n is an integer which is at least one, m is an integer which is at least one, R.sup.1 and R.sup.2 are biodegradable structures.

Disclosed herein are compounds and compositions useful for reducing the risk of infection. In particular, disclosed herein are mandelic acid condensation polymers, compositions comprising such compounds, processes for producing such compounds, and methods of using such compounds.

Disclosed is a method of preparing a sulfonate group-based anion resin including: performing a quaternization reaction between a nitrogen-containing compound and a quaternizing agent comprising a sulfonate compound at a temperature of 25C to 120 C. for 3 to 72 hours to obtain the sulfonate group-based anion resin. The nitrogen-containing compound includes at least one of a segment I, a segment II, and a segment III; in which the segment I is

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the segment II is

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and the segment III is

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Boric acid is used as an adjuvant for the liquid catalyst used to cure furan-based binder systems for forming a foundry mold in a warm box process. The binder system comprises furfuryl alcohol, a furan resin, and a furan monomer or oligomer containing at least two terminal hydroxymethyl groups. The binder system also comprises a latent acid curing catalyst and the boric acid. The boric acid improves tensile strength of the foundry mix as well as through cure of the binder.

A hardmask composition, a hardmask layer that is manufactured from the hardmask composition, and a method of forming patterns by using the hardmask layer manufactured from the hardmask composition, the hardmask composition includes a polymer including a structural unit represented by Chemical Formula 1; and a solvent,

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An electrode layer for a high-temperature polymer electrolyte membrane fuel cell includes a polymer binder having a new structure, in which a phosphate group is introduced into the end of the side chain of a branched polymer binder. The binder itself can exhibit ion conduction properties and can have excellent chemical stability, excellent interfacial bonding properties, and high electrochemical properties.