▎ 摘　　要

NOVELTY - Composition comprises: at least one matrix polymer chosen from at least one thermoplastic polymer and at least one curable polymer having at least one functional group for crosslinking; and a three-dimensional, branched and/or crosslinked carbon nanostructure additive provided in an amount such that after forming an article the composition, the article is conductive and has a volume resistivity level of 0.5 ohm-cm or less. The article demonstrates one or more of a dissipative effect and a quantum tunneling composite effect. USE - The composition is used for forming an article, where the article is an electromagnetic interference shielding article and/or a radiofrequency interference shielding article. The composition is used as electromagnetic interference shielding and/or a radio frequency interference shielding composition. The composition is used for obtaining a cured material used in an electromagnetic interference shielding application or a radio frequency interference shielding application. The composition is used for forming an elastomeric article and/or a thermoplastic article, where the article is chosen from a gasket, a seal, a cover, and a component components, for use in an electromagnetic interference shielding device or in a radio frequency interference device. The composition is used for forming an article, where the article is chosen from a seal, a gasket, a cover or a component portion of an electromagnetic interference shielding device and/or a radio frequency interference shielding device. The article is a seal, gasket, or other component in a sealing assembly. The article is an elastomeric quantum tunneling composite and is a self-sensing article (all claimed). The composition is used for electronic shielding or dissipative end applications. The seals are used in semiconductor manufacturing processes, and/or in cleanroom environments. The article is used for lower conductive or dissipative end applications, and for an electromagnetic interference shielding and/or radio frequency interference shielding material, or other conductive end uses. The article is used as a quantum tunneling composite (QTC) or a dissipative conductive polymer or elastomer to be employed in various end applications, and is used in quantum tunneling composite applications. The seals are used as self-sensing seals for sealing applications, and used in valve assemblies having seals, such as slit valve doors with seals, e.g., ball segment valve, pendulum valves and other chamber or flow isolation valves, semiconductor applications. The composition is used in pharmaceutical clean room applications, downhole and other oil field applications and in gas and/or liquid applications in fluid handling chemical applications as seals or other formed articles. ADVANTAGE - The composition provides unique electromagnetic shielding properties, especially at high loading, without significant particulation and allows formation of smart articles for evaluating the performance of the articles in real time when employed in various end applications, particularly in semiconductor applications, by monitoring the conductivity of the materials as a function of their bulk resistivity over time. The composition ensures maximum useful seal life and critical analysis that would assist in choosing the optimal seal and associated maximum seal life for use in semiconductor processing so as to minimize down time and up time, improves maintenance cycles and avoids seal degradation failures, which is simple to monitor and which preferably does not impact the operation of the seal or the consistency of its properties, including maintaining high seal elastomeric, mechanical and chemically resistant properties. The article can provide varying and/or responsive electrical properties, while remaining cleanroom friendly such that in the presence of seal degradation over time, harsh metal fillers are not present. The composition can provide controlled levels of electrical properties when needed for particular end applications. The articles are able to exhibit conductivity as a thermoplastic or elastomeric quantum tunneling composite (QTC) such that when subjected to application of compressive stress (such as when under a load), and the articles exhibit a conductivity that is higher than a conductivity of the article when the compressive stress is released. The article is insulative and exhibits conductivity when stress is applied. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) an electromagnetic interference shielding and/or a radio frequency interference shielding composition, comprising at least one matrix polymer chosen from a thermoplastic and/or a curable polymer having at least one functional group for crosslinking that is chosen from at least one curable fluoropolymer, at least one curable perfluoropolyether, at least one perfluoropolymer, at least one curable polymer comprising silicon and fluorine, and their copolymers and blends, and 5-300 pts. wt. of a carbon nanostructure additive per 100 pts. wt. of the at least one matrix polymer, where when the composition is cured and formed into an article, it has a volume resistivity level of 0.5 ohm-cm or less, and where the carbon nanostructure additive is three-dimensional, branched and crosslinked; (2) an article formed from the composition; and (3) a method of making an article, comprising providing a composition comprising at least one matrix polymer chosen from a thermoplastic and/or a curable polymer having at least one functional group for crosslinking and at least one carbon nanostructure additive that is three-dimensional, branched and/or crosslinked, where the at least one carbon nanostructure additive is present in an amount of 0.1-300 pts. wt., preferably 1-30 pts. wt. per 100 pts. wt. of the at least one matrix polymer, and forming an article from the composition by either heat-forming the composition or by curing and heat-forming the composition, where the article may be used in at least one of an electromagnetic shielding device and a radio frequency shielding device, and the article exhibits at least one of a dissipative effect or a quantum tunneling effect.