Silicon oxycarbonitride by pyrolysis of polycyclosiloxanes in ammonia
    31.
    发明授权
    Silicon oxycarbonitride by pyrolysis of polycyclosiloxanes in ammonia 失效
    硅碳氮氧化物通过在氨中热分解多环硅氧烷

    公开(公告)号:US5322825A

    公开(公告)日:1994-06-21

    申请号:US890413

    申请日:1992-05-29

    摘要: An improved fiber reinforced glass composite includes a refractory fiber in a matrix of a nitrogen-containing black glass ceramic having the empirical formula SiN.sub.z C.sub.x O.sub.y where x ranges from greater than zero up to about 2.0, preferably 0.1 to 1.0, y ranges from 0.5 up to about 3.0, preferably 0.7 to 1.8, and z ranges from above zero up to about 1.5, preferably 0.2 to 1.0. Preferably the black glass ceramic is derived from cyclosiloxane monomers containing a vinyl group attached to silicon and/or a hydride-silicon group. The cyclosiloxane monomers are polymerized and then pyrolyzed in an ammonia-containing atmosphere to produce the nitrogen-containing black glass (silicon oxycarbonitride).

    摘要翻译: 改进的纤维增强玻璃复合材料包括具有经验式SiNzCxOy的含氮黑玻璃陶瓷的基质中的耐火纤维,其中x为大于零至约2.0,优选为0.1至1.0,y为0.5至约 3.0,优选0.7至1.8,z范围从高到零,最大为1.5,优选为0.2至1.0。 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。 将环硅氧烷单体聚合,然后在含氨气氛中热解生成含氮黑玻璃(硅碳氮氧化物)。

    High strength and high tensile modulus fibers or poly(ethylene oxide)
    35.
    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。