摘要:
Strong fibers of poly(ethylene oxide) result from crystallization of the polymer of molecular weight of at least about 500,000 in a shear flow field. Using solutions of a polymer with a molecular weight greater than about 1,000,000, fibers with a tensile strength and tensile modulus of at least 0.1 and 0.5 GPa, respectively, can be readily obtained. Crystallization from a xylene solution within the range from about 35.degree. to about 45.degree. C. is particularly effective.
摘要:
The invention relates to the production of nanoporous silica dielectric films and to semiconductor devices and integrated circuits comprising these improved films. The nanoporous films of the invention are prepared using silicon containing pre-polymers and are prepared by a process that allows crosslinking at lowered gel temperatures by means of a metal-ion-free onium or nucleophile catalyst.
摘要:
An improved fiber reinforced glass composite includes a carbon-coated refractory fiber in a matrix of a black glass ceramic having the empirical formula SiCxOy where x ranges from about 0.5 to about 2.0, preferably 0.9 to 1.6 and y ranges from about 0.5 to 3.0, preferably 0.7 to 1.8. Preferably the black glass ceramic is derived from cyclosiloxane monomers containing a vinyl group attached to silicon and/or a hydride-silicon group.
摘要翻译:改进的纤维增强玻璃复合材料包括具有经验式SiC x O y的黑色玻璃陶瓷基质中的碳涂层耐火纤维,其中x为约0.5至约2.0,优选0.9至1.6,y为约0.5至3.0,优选为 0.7至1.8。 优选地,黑色玻璃陶瓷衍生自含有连接到硅和/或氢化物 - 硅基团的乙烯基的环硅氧烷单体。
摘要:
Carbon-containing black glass compositions of matter having the empirical formula SiC.sub.x O.sub.y and derived from the precursor polymers obtained by reacting (a) cyclo siloxanes and (b) non-cyclic siloxanes, each of the reactants having either or both of hydrogen and an unsubstituted vinyl group whereby a polymer is formed by a hydrosilylation reaction.
摘要翻译:具有经验式为SiC x O y并且由(a)环硅氧烷和(b)非环状硅氧烷反应获得的前体聚合物的含碳黑色玻璃组合物,每种反应物都具有氢和未取代的乙烯基 由此通过氢化硅烷化反应形成聚合物。
摘要:
A treating agent composition for increasing the hydrophobicity of an organosilicate glass dielectric film when applied to said film. It includes a component capable of alkylating or arylating silanol moieties of the organosilicate glass dielectric film via silylation, and an activating agent which may be an acid, a base, an onium compound, a dehydrating agent, and combinations thereof, and a solvent or mixture of a main solvent and a co-solvent.
摘要:
The present invention provides an organosiloxane comprising at least 80 weight percent of Formula I: [Y0.01-1.0SiO1.5-2]a[Z0.01-1.0SiO1.5-2]b[H0.01-1.0SiO1.5-2]c where Y is aryl; Z is alkenyl; a is from 15 percent to 70 percent of Formula I; b is from 2 percent to 50 percent of Formula I; and c is from 20 percent to 80 percent of Formula I. The present composition is useful in semiconductor devices and may be advantageously used as an etch stop.
摘要:
This invention relates to a black glass fiber which is resistant to oxidation at a temperature of about 1350.degree. C. and has the empirical formula SiC.sub.x O.sub.y where x ranges from about 0.5 to about 2.0 and y ranges from about 0.5 to about 2.0. This invention also relates to a process for preparing a black glass fiber comprising reacting a silicon hydride group with a silicon olefinic group in the presence of a hydrosilylation catalyst to give a cyclosiloxane polymer. The polymer is then spun into fiber, hardened and then pyrolyzed to give a black glass fiber.
摘要翻译:本发明涉及一种在约1350℃的温度下耐氧化的黑色玻璃纤维,其具有经验式为SiC x O y,其中x为约0.5至约2.0,y为约0.5至约2.0。 本发明还涉及一种制备黑玻璃纤维的方法,包括在氢化硅烷化催化剂存在下使氢化硅烷基与硅烯基反应,得到环硅氧烷聚合物。 然后将聚合物纺丝成纤维,硬化,然后热解,得到黑色玻璃纤维。
摘要:
An improved fiber reinforced glass composite includes a carbon fiber in a matrix of a black glass ceramic having the empirical formula SiCxOy where x ranges from about 0.5 to about 2.0, preferably 0.9 to 1.6 and y ranges from about 0.5 to 3.0, preferably 0.7 to 1.8. Preferably the black glass ceramic is derived from cyclosiloxane monomers containing a vinyl group attached to silicon and/or a hydride-silicon group. Graceful failure can be obtained when the carbon fibers are highly graphitized.
摘要:
A fiber reinforced glass composite capable of absorbing or transmitting microwave radiation includes refractory fiber in a matrix of a black glass ceramic having the empirical formula SiCxOy where x is greater than zero and up to about 2.0, and y is greater than zero and up to about 2.2. Preferably, the black glass ceramic is made by pyrolyzing precursor polymers derived from cyclosiloxane monomers containing a vinyl group attached to silicon and/or a hydride-silicon group in a controlled atmosphere, thereby adjusting the dielectric properties.
摘要翻译:能够吸收或传递微波辐射的纤维增强玻璃复合材料包括具有经验式SiC x O y的黑色玻璃陶瓷的基体中的耐火纤维,其中x大于零且高达约2.0,并且y大于零并且高达约 2.2。 优选地,黑色玻璃陶瓷通过在受控气氛中热解衍生自含有连接到硅和/或氢化物 - 硅基团的乙烯基的环硅氧烷单体的前体聚合物来制备,从而调节介电性质。
摘要:
A toughening agent composition for increasing the hydrophobicity of an organosilicate glass dielectric film when applied to said film. It includes a component capable of alkylating or arylating silanol moieties of the organosilicate glass dielectric film via silylation, and an activating agent selected from the group consisting of an amine, an onium compound and an alkali metal hydroxide.