Abstract: Disclosed is an adhesive formulation that, when stimulated by a defeatable stimulation, reduces an adhesive bonding force of the adhesive formulation and defeats the adhesive formulation. The adhesive formulation having (i) programmable linkages made from Diels-Alder adducts and (ii) a concentration of diene traps. The Diels-Alder adducts may be furan-maleimide, and the diene traps may be (i) latent alkenes and (ii) selected from functional groups that will create irreversible reations with furan. The adhesive formulation may be capable of being applied as a coating, and the adhesive formulation may be capable of being extruded. The adhesive formulation may have a bonding temperature between 75 and 120° C. And the defeatable stimulation could, for example, be a temperature above 130° C. The adhesive formulation also may contain several types of programmable linkages and diene traps.

Abstract: A reagent-loaded pencil, method of preparing a reagent-loaded pencil, and a system that uses reagent-loaded pencils are disclosed. The reagent-loaded pencil or pencils include a matrix of at least a soluble carrier, a hardening substance, and a reagent. The pencils also include a sheath disposed around at least a portion of the matrix. The soluble carrier may include poly(ethylene glycol) methyl ether. The hardening substance may leave a visible mark when abraded against a writing surface. One example of such a substance includes graphite. The sheath may be the outside of a wooden pencil or a mechanical pencil. A system that uses reagent-loaded pencils or compressed matrices may include a computer-controlled plotter that holds and plots with at least one of the reagent-loaded pencils or matrices.

Abstract: A reagent-loaded pencil, method of preparing a reagent-loaded pencil, and a system that uses reagent-loaded pencils are disclosed. The reagent-loaded pencil or pencils include a matrix of at least a soluble carrier, a hardening substance, and a reagent. The pencils also include a sheath disposed around at least a portion of the matrix. The soluble carrier may include poly(ethylene glycol) methyl ether. The hardening substance may leave a visible mark when abraded against a writing surface. One example of such a substance includes graphite. The sheath may be the outside of a wooden pencil or a mechanical pencil. A system that uses reagent-loaded pencils or compressed matrices may include a computer-controlled plotter that holds and plots with at least one of the reagent-loaded pencils or matrices.

Abstract: A composition is provided that includes a polymer matrix. A core having a core surface is embedded within the polymer matrix. A polymeric ligand passivates the core surface and has a moiety Y, where Y is a Diels-Alder group of a diene or dienophile. A polymeric linker has a complementary Diels-Alder group diene or dienophile to moiety Y and forms a Diels-Alder bond with the moiety Y. A composition is also provided that includes polymer matrix having a matrix surface. A core having a core surface is present on the matrix surface. A polymeric ligand passivates the core surface and has a moiety Y, where Y is Diels-Alder group of a diene or dienophile. The polymer matrix and polymeric ligand together define a matrix-ligand Flory-Huggins binary interaction function greater than 0.

Abstract: A reversible viscosity reducing polymer is provided that has a crosslinkage between subunits inclusive of a single Diels-Alder Such a reversible viscosity reducing polymer is particularly well suited as a matrix material for a heterogeneous propellant. A process for forming a reversible viscosity reducing polymer inclusive of a single Diels-Alder linkage includes reacting a native crosslinkable moiety with a crosslinker moiety having a Diels-Alder reactive moiety of a diene or dienophile to form a Diels-Alder reactive moiety capped polymer subunit. The Diels-Alder reactive moiety capped polymer subunit is then exposed to a Diels-Alder reactant inclusive of a complementary Diels-Alder reactive moiety where the reactant also includes at least one conventional crosslinkable moiety to form a crosslinkable moiety capped polymer subunit. Reaction of the crosslinkable moiety capped polymer subunit is then reacted with a conventional multifunctional crosslinking agent.

Abstract: A reversible viscosity reducing polymer is provided that has a crosslinkage between subunits inclusive of a single Diels-Alder Such a reversible viscosity reducing polymer is particularly well suited as a matrix material for a heterogeneous propellant. A process for forming a reversible viscosity reducing polymer inclusive of a single Diels-Alder linkage includes reacting a native crosslinkable moiety with a crosslinker moiety having a Diels-Alder reactive moiety of a diene or dienophile to form a Diels-Alder reactive moiety capped polymer subunit. The Diels-Alder reactive moiety capped polymer subunit is then exposed to a Diels-Alder reactant inclusive of a complementary Diels-Alder reactive moiety where the reactant also includes at least one conventional crosslinkable moiety to form a crosslinkable moiety capped polymer subunit. Reaction of the crosslinkable moiety capped polymer subunit is then reacted with a conventional multifunctional crosslinking agent.

Abstract: A composition is provided that includes a polymer matrix. A core having a core surface is embedded within the polymer matrix. A polymeric ligand passivates the core surface and has a moiety Y, where Y is a Diels-Alder group of a diene or dienophile. A polymeric linker has a complementary Diels-Alder group diene or dienophile to moiety Y and forms a Diels-Alder bond with the moiety Y. A composition is also provided that includes polymer matrix having a matrix surface. A core having a core surface is present on the matrix surface. A polymeric ligand passivates the core surface and has a moiety Y, where Y is Diels-Alder group of a diene or dienophile. The polymer matrix and polymeric ligand together define a matrix-ligand Flory-Huggins binary interaction function greater than 0.