High strength and high tensile modulus fibers or poly(ethylene oxide)
    1.
    发明授权
    High strength and high tensile modulus fibers or poly(ethylene oxide) 失效
    高强度和高拉伸模量纤维或聚(环氧乙烷)

    公开(公告)号:US4619988A

    公开(公告)日:1986-10-28

    申请号:US749073

    申请日:1985-06-26

    CPC分类号: C08J5/046 D01D5/40 D01F6/66

    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.

    摘要翻译: 聚(环氧乙烷)的强纤维是由剪切流场中分子量至少约为500,000的聚合物结晶而产生的。 使用分子量大于约1,000,000的聚合物溶液,可以容易地获得拉伸强度和拉伸模量分别为至少0.1和0.5GPa的纤维。 从约35℃至约45℃范围内的二甲苯溶液结晶是特别有效的。

    Silicon carboxide fibers from gel spinning cyclosiloxane polymer
precursors
    7.
    发明授权
    Silicon carboxide fibers from gel spinning cyclosiloxane polymer precursors 失效
    来自凝胶纺丝环硅氧烷聚合物前体的硅羧化纤维

    公开(公告)号:US5629249A

    公开(公告)日:1997-05-13

    申请号:US185620

    申请日:1988-04-25

    申请人: Roger Y. Leung

    发明人: Roger Y. Leung

    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。

    Ceramic Fiber reinforced silicon carboxide composite with adjustable
dielectric properties
    9.
    发明授权
    Ceramic Fiber reinforced silicon carboxide composite with adjustable dielectric properties 失效
    陶瓷纤维增强硅羧化合物具有可调的介电性能

    公开(公告)号:US5318930A

    公开(公告)日:1994-06-07

    申请号:US52432

    申请日:1993-05-26

    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。