Abstract:
Compositions and methods for manufacturing polymers are disclosed. Compositions include novel plastics, including films and shaped forms comprising polymer matrices that are biologically compatible and biodegradable. Such plastics may comprise polymers derived from natural sources. Further, such plastics are useful in biological systems for wound repair, implants, stents, drug encapsulation and delivery, and other applications. The disclosed methods comprise mild manufacturing processes such that various additives, such as biologically active proteins, sugars, lipids, and the like may be incorporated into the polymer matrix without subsequent loss of bioactivity during processing. Additionally, methods of manufacture for controlling mechanical properties, such as elasticity, pliancy, and the porosity of such plastics are disclosed.
Abstract:
A foamed product in a sheet form comprising a plurality of closed cells and/or continuous plural cells; and a method for production thereof. Said foamed product is produced from a foaming composition which comprises an acid-generating agent effecting the generation of an acid by the exposure to an active energy ray or a base-generating agent effecting the generation of a base by the exposure to an active energy ray and a compound having a decomposition foaming functional group which reacts with an acid or a base and thereby releases one or more volatile materials having a low boiling point.
Abstract:
A film-forming composition comprising: a compound having a specific cage structure; a pore-forming agent; an adhesion promoter; and so on, an insulating film formed from the film-forming composition and an electronic device comprising the insulating film.
Abstract:
A medical prosthesis (10) includes a body having a silicone skin (14) and a silicone foam body core (16). The skin (14) and foam core (16) are both resilient. The core (16) includes a plurality of voids (18) and a plurality of discontinuities (28). Some of the discontinuities (28) communicate with more than one void (18).
Abstract:
Nanoporous materials are fabricated from polymers having backbones with reactive groups used in crosslinking. In one aspect of preferred methods and compositions, the reactive groups in the backbone comprise a diene and a dienophile. The diene may advantageously comprise a tetracyclone, and the dienophile may advantageously comprise an ethynyl. In another aspect of preferred methods and compositions, the reactive groups in the backbone are included in a conjugated system. Especially preferred polymeric strands comprise a poly(arylene ether) synthesized from a difluoroaromatic portion and an aromatic bisphenolic portion. It is still more preferred that the difluoroaromatic portions of the poly(arylene ether) are modified in such a way that some difluoroaromatic portions carry a themolabile portion. In still other aspects crosslinking may advantageously occur without reliance on a exogenous crosslinker.
Abstract:
Porous dielectric materials having low dielectric constants useful in electronic component manufacture are disclosed along with methods of preparing the porous dielectric materials. Also disclosed are methods of forming integrated circuits containing such porous dielectric materials.
Abstract:
Ein Verfahren zum Erzeugen von Mikrostrukturen wie Mikrolöchern oder -kanälen (7) in Festkörpern (1) durch Ätzen von Teilchenspuren (4), vorzugsweise von Kernspuren hochenergetischer schwerer Ionen aus einem Beschleuniger. Beim Ätzen wird der pH-Wert der Ätzflüssigkeit in mehreren Stufen variiert, da die sogenannte Selektivität, das Verhältnis der Spurätzrate zur Materialätzrate, vom pH-Wert der Ätzflüssigkeit abhängt. Auf diese Weise lassen sich genau vorbestimmbare Mikrostrukturen bzw. -poren erzeugen.
Abstract:
L'invention concerne un procédé de préparation d'une composition polymérique en particulier utilisable pour constituer une électrode de batterie lithium-ion, sodium-ion ou de supercondensateur ou pour présenter des propriétés magnétiques, une telle composition polymérique obtenue par ce procédé, un mélange précurseur de la composition obtenu par une première étape de mélangeage du procédé, et cette électrode. Le procédé de préparation de cette composition comprend: a) un mélangeage à chaud par voie fondue et sans solvant d'au moins une matière active, d'une phase polymérique formant liant et d'une phase polymérique sacrificielle pour l'obtention d'un mélange, et b) une élimination au moins partielle de ladite phase polymérique sacrificielle pour l'obtention de ladite composition qui comprend la ou les matière(s) active(s) selon une fraction massique supérieure à 80 %. Selon l'invention, la phase sacrificielle est utilisée à l'étape a) selon une fraction massique dans le mélange égale ou supérieure à 15 %.