Abstract: A method for synthesizing polyhydroxyurethane polymers by using cyclic carbonates, amines, and base catalysts. A method for synthesizing polyhydroxyurethane (PHU) and polyimine (PI) hybrid polymer (PHU-PI) by using a multivalent cyclic carbonate monomer, a multivalent aldehyde monomer, and a multivalent amine monomer. A method for synthesizing a polyhydroxyurethane (PHU), polyimine (PI), and epoxy resin hybrid polymer (PHU-PI-epoxy) by using a multivalent cyclic carbonate monomer, a multivalent aldehyde monomer, a multivalent epoxide monomer, and a multivalent amine monomer. Cyclic carbonate monomers may be obtained from epoxides through the insertion of carbon dioxide. A polyhydroxyurethane may be reprocessed multiple times with minimal properties decrease with or without the addition of a catalyst. A polyhydroxyurethane may be combined with pristine or recycled reinforcing fibers to form a fiber-reinforced composite having specific desired material properties.

Abstract: The invention discloses a lower pair arc stop-block overrunning clutch comprising an outer rotating element, an inner rotating element, a friction block assembly, a wedge assembly, a first propeller assembly, a first elastic element and a synchronized push-block assembly, wherein a plurality of friction blocks of the friction block assembly are connected end to end and arranged between a first rotating ring and a second rotating ring; an drive element drives the first propeller assembly to press the synchronized push-block assembly to achieve synchronization of the friction block assembly; the first propeller assembly strikes the friction block assembly and is relatively stationary to push the friction block assembly for generating reverse rotation relative to a driven element; the wedge assembly is wedged to generate a radial pressure on the friction block assembly so that the friction block assembly can achieve lower pair arc stop, thereby achieving the transfer of torque.

Abstract: Porous bulk materials formed of shape-persistent, non-collapsible, three-dimensional molecular cage building blocks are presented that are useful for a variety of applications including gas separation/storage, sensing, and catalysis.

Abstract: The present invention includes a novel self-assembling nanocomposite structure comprising a shape-persistent three-dimensional cage molecule. In one aspect, binding of nanoparticles to metal coordinating groups in the cage molecule allows for the self-assembly of the nanoparticles into a nanocomposite material. The present invention further includes methods of preparing such self-assembling nanocomposite structures.

Abstract: Porous bulk materials formed of shape-persistent, non-collapsible, three-dimensional molecular cage building blocks are presented that are useful for a variety of applications including gas separation/storage, sensing, and catalysis.