Abstract: Methods for forming polyolefin nanocomposite precursor compositions are provided. In embodiments, such a method comprises mixing a polyolefin, unmodified graphite, and a peroxide crosslinker via solid-state shear pulverization under conditions to form a polyolefin nanocomposite precursor composition comprising the polyolefin; exfoliated, unmodified graphite dispersed throughout the polyolefin; and unreacted peroxide crosslinker dispersed throughout the polyolefin, wherein the polyolefin is polyethylene, a copolymer of polyethylene, or combinations thereof. Methods of forming crosslinked polyolefin nanocomposites, the polyolefin nanocomposite precursor compositions, and crosslinked polyolefin nanocomposites are also provided.

Abstract: Curable compositions for dynamic epoxy-based thermoset adhesives and/or sealants are provided. Methods of applying the compositions to form strong, low-stress, cured adhesive polymer films are also provided. The cured polymer films use crosslinkers that include disulfide and carbon-nitrogen bonds, wherein the disulfide bonds impart dynamic chemistry to the polymer network structure in order to the achieve adaptable thermoset adhesives and sealants.

Abstract: Polythiourethane polymer networks that can be processed and/or recycled are provided. Also provided are methods of forming the polythiourethane polymer networks using excess thiol and/or a dual catalyst system and methods for reprocessing and recycling the polyurethane polymer networks. The polythiourethane polymer networks are based on thiourethane dynamic chemistry.

Abstract: Methods for forming polyolefin nanocomposite precursor compositions are provided. In embodiments, such a method comprises mixing a polyolefin, unmodified graphite, and a peroxide crosslinker via solid-state shear pulverization under conditions to form a polyolefin nanocomposite precursor composition comprising the polyolefin; exfoliated, unmodified graphite dispersed throughout the polyolefin; and unreacted peroxide crosslinker dispersed throughout the polyolefin, wherein the polyolefin is polyethylene, a copolymer of polyethylene, or combinations thereof. Methods of forming crosslinked polyolefin nanocomposites, the polyolefin nanocomposite precursor compositions, and crosslinked polyolefin nanocomposites are also provided.

Abstract: Methods for removing contaminants from aqueous media using polyelectrolyte complexes having a heterogeneous charge distribution are provided. The polyelectrolyte complexes are formed from an amphiphilic anionic random copolymer and a cationic random copolymer are provided. The polyelectrolyte complexes absorb cationic, anionic, or hydrophobic organic molecules and can be easily removed from water.

Abstract: A composition for forming a dynamic crosslinked polymer network may comprise (a) a dynamic crosslinker having formula R—R?R?N—S—S—NR?R?—R, wherein each R is a polymerizable group comprising a carbon-carbon (C—C) double bond capable of undergoing free radical polymerization and each R? and each R? are independently selected alkyl groups; (b) a polymer comprising a C?C double bond capable of undergoing free radical polymerization, a monomer comprising a C?C double bond capable of undergoing free radical polymerization, or combinations thereof; and (c) a free radical initiator, wherein the dynamic crosslinker does not comprise a urethane group.

Abstract: Methods for forming polyolefin nanocomposite precursor compositions are provided. In embodiments, such a method comprises mixing a polyolefin, unmodified graphite, and a peroxide crosslinker via solid-state shear polymerization under conditions to form a polyolefin nanocomposite precursor composition comprising the polyolefin; exfoliated, unmodified graphite dispersed throughout the polyolefin; and unreacted peroxide crosslinker dispersed throughout the polyolefin, wherein the polyolefin is polyethylene, a copolymer of polyethylene, or combinations thereof. Methods of forming crosslinked polyolefin nanocomposites, the polyolefin nanocomposite precursor compositions, and crosslinked polyolefin nanocomposites are also provided.

Abstract: Reprocessable crosslinked polyurethane networks, methods for making the reprocessable polyurethane networks, and methods for depolymerizing the crosslinked polyurethane networks and recovering the depolymerized monomers are provided. The polyurethane networks are rendered reprocessable by the incorporation of free hydroxyl groups and the incorporation of multi-functional alcohol crosslinkers.

Abstract: Curable compositions for dynamic epoxy-based thermoset adhesives and/or sealants are provided. Methods of applying the compositions to form strong, low-stress, cured adhesive polymer films are also provided. The cured polymer films use crosslinkers that include disulfide and carbon-nitrogen bonds, wherein the disulfide bonds impart dynamic chemistry to the polymer network structure in order to the achieve adaptable thermoset adhesives and sealants.

Abstract: Polythiourethane polymer networks that can be processed and/or recycled are provided. Also provided are methods of forming the polythiourethane polymer networks using excess thiol and/or a dual catalyst system and methods for reprocessing and recycling the polyurethane polymer networks. The polythiourethane polymer networks are based on thiourethane dynamic chemistry.

Abstract: Methods for preparation of polymer materials incorporating various organic components, including but not limited to solid and/or liquid organic wastes, post-consumer refuse and agricultural, commercial and/or manufacturing by-products, using solid-state shear pulverization.

Abstract: Reorganizable or reprocessable cross-linked polymer networks with alkoxyamine dynamic covalent bonds and methods for preparation.

Abstract: Solid-state shear pulverization of semi-crystalline polymers and copolymers thereof and related methods for enhanced crystallization kinetics and physical/mechanical properties.

Abstract: Methods for improved colorant dispersion in polymer materials using solid-state shear pulverization, as compared to mixing techniques of the prior art, to address concerns relating to colorant agglomeration, plating-out and the like.

Abstract: Solid-state shear pulverization of semi-crystalline polymers and copolymers thereof and related methods for enhanced crystallization kinetics and physical/mechanical properties.

Abstract: Polymeric compositions comprising as-received organic waste materials comprising an antioxidant component for enhanced thermal stability.

Abstract: Solid-state shear pulverization of semi-crystalline polymers and copolymers thereof and related methods for enhanced crystallization kinetics and physical/mechanical properties.

Abstract: Solid-state shear pulverization of semi-crystalline polymers and copolymers thereof and related methods for enhanced crystallization kinetics and physical/mechanical properties.

Abstract: Functionalization of polymers, including polyolefins, via decomposition of organic peroxides through the use of solid-state shear pulverization.

Abstract: Functionalization of polymers, including polyolefins, with a, ?-unsaturated carboxy-derived moieties through the use of solid-state shear pulverization.