Polyolefin graft copolymers made with fluorinated monomers
    3.
    发明授权
    Polyolefin graft copolymers made with fluorinated monomers 失效
    用氟化单体制成的聚烯烃接枝共聚物

    公开(公告)号:US06800694B2

    公开(公告)日:2004-10-05

    申请号:US09952174

    申请日:2001-09-14

    IPC分类号: C08F25500

    摘要: A fluorine-containing graft copolymer is made from a backbone of an olefin polymer material to which is graft polymerized (a) at least one gaseous fluorinated monomer such as vinylidene fluoride, (b) at least one fluorinated acrylic acid or ester, (c) a mixture of (a) and (b), or (d) a mixture of (a) and/or (b) and a non-fluorinated monomer such as methyl methacrylate. An organic peroxide or a polymeric peroxide is used as the initiator for the graft polymerization process. The graft copolymers have improved surface properties and oxygen barrier properties, and improved thermal stability.

    摘要翻译: 含氟接枝共聚物由烯烃聚合物材料的骨架制成,其中接枝聚合(a)至少一种气态氟化单体如偏二氟乙烯,(b)至少一种氟化丙烯酸或酯,(c) (a)和(b)的混合物,或(d)(a)和/或(b)的混合物和非氟化单体如甲基丙烯酸甲酯的混合物。 使用有机过氧化物或聚合过氧化物作为接枝聚合过程的引发剂。 接枝共聚物具有改善的表面性能和氧气阻隔性能,并且改善了热稳定性。

    Method for measuring the concentration of sodium in a flow of
mercury-sodium amalgam
    4.
    发明授权
    Method for measuring the concentration of sodium in a flow of mercury-sodium amalgam 失效
    测量汞 - 钠汞齐流中钠浓度的方法

    公开(公告)号:US4208253A

    公开(公告)日:1980-06-17

    申请号:US942238

    申请日:1978-09-14

    IPC分类号: G01N27/416 G01N27/46

    CPC分类号: G01N27/4166

    摘要: The concentration of sodium metal in a flow of mercury-sodium amalgam is measured by flowing an aqueous solution of sodium chloride through a conduit of electrically insulating material terminating with a porous septum or a capillary immersed in the flow of mercury-sodium amalgam, at a rate of at least 4 ml per hour and per cm.sup.2 of surface area of contact between the surface of the porous septum or the section of the capillary opening and the amalgam, and monitoring the electromotive force generated between said amalgam and a calomel or silver-silver chloride reference electrode located within said conduit and in contact with said solution.

    摘要翻译: 通过使氯化钠水溶液流过电绝缘材料的导管,通过浸渍在汞 - 钠汞齐流中的多孔隔膜或毛细管流出,测量汞 - 汞齐汞合金中金属钠的浓度, 每小时至少4ml的速率和每cm 2多孔隔膜的表面或毛细管开口部分和汞齐之间的每cm 2接触面积,并监测所述汞齐与甘汞或银银之间产生的电动势 氯化物参比电极位于所述导管内并与所述溶液接触。