A biodegradable electroactive material can be doped with a drug and the drug can be delivered to a living subject by stimulating the material with an electrical potential. The material (in this case a polymer) has an electrochemically responsive oligoaniline block terminated with a carboxylic acid moiety and is linked to an alcohol-terminated diol by an ester bond. Advantageously, the diol is PEG-400, PEG-2000, PCL-530, or PCL-2000.

A biodegradable electroactive material can be doped with a drug and the drug can be delivered to a living subject by stimulating the material with an electrical potential. The material (in this case a polymer) has an electrochemically responsive oligoaniline block terminated with a carboxylic acid moiety and is linked to an alcohol-terminated diol by an ester bond. Advantageously, the diol is PEG-400, PEG-2000, PCL-530, or PCL-2000.

A polyarylene ether sulfone contains endgroups of formula (I),

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A molding composition contains the polyarylene ether sulfone; and a fiber, film, or shaped article can be produced using the molding composition.

A resin powder contains a resin, wherein the proportion of fine powder having a number diameter of 40 percent or less of a mean number diameter Mn of the resin powder is 30 percent or less in the resin powder.

A resin powder contains a resin, wherein the proportion of fine powder having a number diameter of 40 percent or less of a mean number diameter Mn of the resin powder is 30 percent or less in the resin powder.

Disclosed is a high-strength copolymerized aramid fiber which includes aramid copolymers containing an aromatic group substituted with a cyano group (—CN), so as to have an intrinsic viscosity (IV) of 6.0 to 8.5, a polydispersity index (PDI) of 1.5 to 2.0, a strength of 23 to 32 g/d, and an elastic modulus of 1,100 to 1,300 g/d. The high-strength copolymerized aramid fiber may be prepared by a method which includes, when para-phenylenediamine, cyano-para-phenylenediamine, and terephthaloyl dichloride are sequentially added to an organic solvent and reacted together to prepare a copolymerized aramid fiber, adding and dispersing a neutralizing agent in the organic solvent before the reaction of the para-phenylenediamine, cyano-para-phenylenediamine and terephthaloyl dichloride, which were dissolved in the organic solvent.

Disclosed is a high-strength copolymerized aramid fiber which includes aramid copolymers containing an aromatic group substituted with a cyano group (—CN), so as to have an intrinsic viscosity (IV) of 6.0 to 8.5, a polydispersity index (PDI) of 1.5 to 2.0, a strength of 23 to 32 g/d, and an elastic modulus of 1,100 to 1,300 g/d. The high-strength copolymerized aramid fiber may be prepared by a method which includes, when para-phenylenediamine, cyano-para-phenylenediamine, and terephthaloyl dichloride are sequentially added to an organic solvent and reacted together to prepare a copolymerized aramid fiber, adding and dispersing a neutralizing agent in the organic solvent before the reaction of the para-phenylenediamine, cyano-para-phenylenediamine and terephthaloyl dichloride, which were dissolved in the organic solvent.

A family of new and novel molecules for mechanically superior two-dimensional (2D) polymers is described herein. By combining stiff carbon-containing cyclic polymer nodal units with more compliant linear polymer bridge units in an ordered, 2D repeating molecular structure it is possible to tailor the mechanical properties of 2D polymers and their assemblies to provide high stiffness, strength, and toughness. Furthermore, the inherent dimensionality of 2D polymers and their ability to be stacked into ordered and chemically interactive ensembles gives them inherent benefits in a variety of barrier and structural applications over current stiff and strong linear polymer technologies.

The present invention relates to a rapid and innovative mechanism for initiating anionic ring-opening polymerization of laurolactam by means of latent initiators on the basis of thermally activatable N-heterocyclic carbene compounds, such as, more particularly, N-heterocyclic carbene-CO.sub.2 compounds and carbene-metal compounds (NHCs). With the new initiation mechanism it is possible accordingly to realize molecular weights (M.sub.w) of from 2000 up to more than 30,000 g/mol, and narrow polydispersities. The polymerizations may be carried out both in bulk and in solution in a suitable solvent. Compounds of this type are thermally latent and on heating initiate a polymerization to polylaurolactam in high yields, up to a quantitative conversion, whereas at room temperature there is no reaction. Polydispersity and molecular weight of the polylaurolactam can be adjusted through the choice of the initiator and of the reaction conditions.

The present invention relates to a rapid and innovative mechanism for initiating anionic ring-opening polymerization of laurolactam by means of latent initiators on the basis of thermally activatable N-heterocyclic carbene compounds, such as, more particularly, N-heterocyclic carbene-CO.sub.2 compounds and carbene-metal compounds (NHCs). With the new initiation mechanism it is possible accordingly to realize molecular weights (M.sub.w) of from 2000 up to more than 30,000 g/mol, and narrow polydispersities. The polymerizations may be carried out both in bulk and in solution in a suitable solvent. Compounds of this type are thermally latent and on heating initiate a polymerization to polylaurolactam in high yields, up to a quantitative conversion, whereas at room temperature there is no reaction. Polydispersity and molecular weight of the polylaurolactam can be adjusted through the choice of the initiator and of the reaction conditions.