摘要:
Novel magnetorheological elastomer compositions are provided. The magnetorheological elastomers (MREs) may have aligned or randomly arranged magnetizable particles in a thermoset or thermoplastic matrix. The magnetizable particles may be coated to reduce corrosion and/or improve bonding between the particle and the matrix. The magnetizable particles may be flake-shaped. The MREs may have matrices selected from the group consisting of hydrogenated nitrile rubbers, butyl rubbers, ethylene-propylene copolymers and terpolymers, ethylene-acrylic copolymers, fluorinated elastomers, silphenylene-siloxanes, silarylene-siloxanes, poly(carborane-siloxane-acetylene)s and blends thereof. The MREs may also have matrices selected from the group consisting of styrene-butadiene block copolymers, copolyesters, polyamides, polyether block amides, polyolefin-elastomers other than polyalpha olefins, chlorinated polyethylenes, ionomers, chlorosulfonated polyethylenes, blends thereof, and blends of thermoplastic polyurethane with polyvinyl chloride (PVC), polyvinylindene fluoride (PVDF), polycarbonate, or acrylonitrile butadiene styrene (ABS).
摘要:
A tunable vibration isolation device comprising a magneto-rheological elastomer (MRE), and methods of using such a device, are provided. By manipulating a magnetic field within the MRE the device's stiffness is controlled. The vibration isolator can be constructed to provide shock absorption in one, two and three dimensions. Coupling the tunable device to a sensor feedback and a control system provides fast and accurate vibration isolation and energy dissipation for shock events in a variety of applications.
摘要:
The disclosed device is directed toward magneto-rheological fluid encasement device. The magneto-rheological fluid encasement device comprises a body having at least one containment element defining an interior and an exterior. A magneto-rheological fluid is disposed in the interior of the at least one containment element. At least one magnetic field is in operative communication with the magneto-rheological fluid.
摘要:
This invention relates to an improved method for making unsubstituted carborane anions and monosubstituted carborane anions of formula: (R—CBn—Hm′)− where n is an integer ranging from 5 to about 11 and m′ is an integer ranging from 5 to 16 where the relative values of n and m′ depend upon the exact structure of the carborane and the presence of a non-hydrogen substituent. m as used herein is an integer ranging from 5 to 16. When R is hydrogen the anion is unsubstituted. When R is a halogen, a phenyl, a substituted phenyl group, such as fluorophenyl group, or any other substituent, the carborane is substituted. The method is particularly useful for preparation of twelve-vertex carborane anions R—CB11H11−, where R is a defined above, and is specifically useful for preparation of the unsubstituted carborane CB11H12-??, where R is H.
摘要翻译:本发明涉及一种制备未取代的碳硼烷阴离子和具有下式的单取代的碳硼烷阴离子的改进方法:(R-CB N-H) - H SUP >其中n是5至约11的整数,m'是5至16的整数,其中n和m'的相对值取决于碳硼烷的精确结构和非氢取代基的存在。 m为5〜16的整数。当R为氢时,阴离子为未取代的。 当R是卤素时,苯基,取代的苯基,例如氟苯基或任何其它取代基,碳硼烷被取代。 该方法对于制备十二个顶点碳硼烷阴离子R-CB 11,其中R为上述定义,特别有用,以及 特别适用于制备未取代的碳硼烷CB 11 H 12 -12,其中R为H.