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Thermoset polymer composite wires including a multiplicity of substantially continuous fibers embedded in a solidified polymer composite matrix and forming a substantially continuous filament, the solidified polymer composite matrix further including a polymer formed by curing a polymer precursor fr

Thermoset polymer composite wires including a multiplicity of substantially continuous fibers embedded in a solidified polymer composite matrix and forming a substantially continuous filament, the solidified polymer composite matrix further including a polymer formed by curing a polymer precursor from a liquid state and a multiplicity of nanoparticles having a median diameter of one micrometer or less substantially uniformly dispersed throughout the polymer composite matrix, and optionally, a corrosion resistant sheath surrounding the substantially continuous filament. In some embodiments, the multiplicity of particles includes surface-modified particles having a core and a surface modifying agent associated with the core and reacted with the polymer cured from a liquid state. Stranded cables including one or more such thermoset polymer composite wires, and methods of making and using such thermoset polymer composite wires and stranded cables are also described.

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1. A method comprising: impregnating a plurality of substantially continuous fibers with a polymer composite matrix comprising a liquid polymer precursor and a plurality of particles substantially uniformly dispersed throughout the liquid polymer precursor, wherein the plurality of particles has a m

1. A method comprising: impregnating a plurality of substantially continuous fibers with a polymer composite matrix comprising a liquid polymer precursor and a plurality of particles substantially uniformly dispersed throughout the liquid polymer precursor, wherein the plurality of particles has a median diameter of one micrometer or less and wherein the plurality of particles comprises silica particles, calcite particles, or combinations thereof;pulling the fibers impregnated with the polymer composite matrix through a die; andcuring the liquid polymer precursor to form a cured polymer and at least partially solidify the polymer composite matrix in the die, thereby forming a substantially continuous thermoset polymer composite wire filament. 2. The method of claim 1, wherein the plurality of particles comprises reactive surface-modified particles further comprising a nanoparticle core and a reactive surface modifying agent associated with the nanoparticle core; and wherein the step of curing the liquid polymer precursor comprises reacting the liquid polymer precursor with the reactive surface modifying agent. 3. The method of claim 1, wherein the plurality of particles have a median diameter no greater than 250 nm. 4. The method of claim 1, wherein the cured polymer exhibits a glass transition temperature of at least 150° C. 5. The method of claim 1, wherein at least partially solidifying the polymer composite matrix in the die comprises cross-linking the liquid polymer precursor. 6. The method of claim 1, further comprising pulling the continuous fibers impregnated with the matrix through a performer and debulking the fibers. 7. The method of claim 1, further comprising post-curing the liquid polymer precursor after at least partially solidifying the polymer composite matrix in the die to form the composite wire filament. 8. A thermoset polymer composite wire comprising: a plurality of substantially continuous fibers embedded in a solidified polymer composite matrix and forming a substantially continuous filament, wherein the solidified polymer composite matrix further comprises a thermoset polymer formed by curing a liquid polymer precursor from a liquid state, and a plurality of particles substantially uniformly dispersed throughout the liquid polymer precursor, further wherein the plurality of particles has a median diameter of one micrometer or less, and wherein the plurality of particles comprises silica particles, calcite particles, or combinations thereof. 9. The thermoset polymer composite wire of claim 8, wherein the plurality of particles comprises surface-modified particles further comprising a nanoparticle core and a surface modifying agent associated with the nanoparticle core and reacted with the liquid polymer precursor. 10. The thermoset polymer composite wire of claim 8, wherein the plurality of particles has a median diameter no greater than 250 nm. 11. The thermoset polymer composite wire of claim 8, wherein the plurality of continuous fibers comprises at least one fiber selected from the group consisting of aramid fibers, glass fibers, ceramic fibers, metal fibers, polymer fibers, carbon fibers, or a combination thereof. 12. The thermoset polymer composite wire of claim 8, wherein the plurality of substantially continuous fibers further comprises a plurality of fiber surfaces, and wherein the plurality of particles do not substantially contact the plurality of fiber surfaces. 13. The thermoset polymer composite wire of claim 8, wherein the solidified polymer composite matrix comprises a cross-linked polymer. 14. The thermoset polymer composite wire of claim 8, wherein the thermoset polymer formed by curing a polymer precursor from a liquid state exhibits a glass transition temperature of at least 150° C. 15. The thermoset polymer composite wire of claim 8, wherein the thermoset polymer formed by curing a polymer precursor from a liquid state comprises at least one of an epoxy resin, a vinyl ester resin, a polyimide resin, a polyester resin, a cyanate ester resin, a phenolic resin, a bis-maleimide resin, or a combination thereof. 16. The thermoset polymer composite wire of claim 8, further comprising a corrosion resistant sheath surrounding the substantially continuous filament, wherein the corrosion resistant sheath comprises at least one radiation cured polymer, thermoset polymer, thermoplastic polymer having a glass transition temperature of at least 145° C., fluoropolymer, tape, or a combination thereof. 17. The thermoset polymer composite wire of claim 8, wherein the plurality of particles comprises at least one surface-modifying agent associated with a surface of the particles. 18. A stranded cable comprising at least one thermoset polymer composite wire of claim 8, wherein the stranded cable is comprised of: a core wire defining a center longitudinal axis;a first plurality of wires stranded around the core wire; anda second plurality of wires stranded around the first plurality of wires. 19. A method of making a thermoset polymer composite cable, comprising: stranding a first plurality of wires about a core wire defining a center longitudinal axis; andstranding a second plurality of wires around the first plurality of wires;wherein at least one of the core wire, the first plurality of wires, or the second plurality of wires, is comprised of at least one thermoset polymer composite wire further comprising: a plurality of substantially continuous fibers embedded in a solidified polymer composite matrix forming a substantially continuous filament, the solidified polymer composite matrix further comprising a polymer formed by curing a polymer precursor from a liquid state and a plurality of particles having a median diameter of one micrometer or less, the plurality of particles substantially uniformly dispersed throughout the solidified polymer composite matrix, and the plurality of particles comprising silica particles, calcite particles, or combinations thereof.