Highly conductive thermoplastic composites for rapid production of fuel cell bipolar plates
    1.
    发明授权
    Highly conductive thermoplastic composites for rapid production of fuel cell bipolar plates 失效
    用于快速生产燃料电池双极板的高导电性热塑性复合材料

    公开(公告)号:US07365121B2

    公开(公告)日:2008-04-29

    申请号:US10779804

    申请日:2004-02-18

    IPC分类号: C08K3/04 C08K3/40 H01M8/00

    CPC分类号: C08K7/02

    摘要: A low cost method of fabricating bipolar plates for use in fuel cells utilizes a wet lay process for combining graphite particles, thermoplastic fibers, and reinforcing fibers to produce a plurality of formable sheets. The formable sheets are then molded into a bipolar plates with features impressed therein via the molding process. The bipolar plates formed by the process have conductivity in excess of 150 S/cm and have sufficient mechanical strength to be used in fuel cells. The bipolar plates can be formed as a skin/core laminate where a second polymer material is used on the skin surface which provides for enhanced conductivity, chemical resistance, and resistance to gas permeation.

    摘要翻译: 制造用于燃料电池的双极板的低成本方法利用湿式铺设方法来组合石墨颗粒,热塑性纤维和增强纤维,以生产多个可成形片材。 然后将可成形片材模制成具有通过模制工艺在其中印刷的特征的双极板。 通过该方法形成的双极板具有超过150S / cm的电导率并且具有足够的机械强度以用于燃料电池。 双极板可以形成为皮肤/芯层压板,其中在皮肤表面上使用第二聚合物材料,其提供增强的导电性,耐化学性和耐气体渗透性。

    Method of producing foamed polymer materials
    3.
    发明授权
    Method of producing foamed polymer materials 失效
    生产泡沫聚合物材料的方法

    公开(公告)号:US5547996A

    公开(公告)日:1996-08-20

    申请号:US282029

    申请日:1994-07-29

    摘要: Reacting carbonyls, such as aldehydes and ketones, with amines produces a ketimine or aldimine and a water byproduct. When the ketimine or aldimine reaction occurs in a polymer composition, the polymer becomes foamed due to the evolution of water. Hence, carbonyl and amine containing compounds may be introduced into a polymeric composition to serve as an in-situ blowing agent. The carbonyl and amine containing compounds may be different polymers which will be combined through a ketimine or aldimine linkage to form a graft co-polymer, they may be small molecular weight additives that are placed in the composition with a polymer that is to be foamed as a byproduct of a ketimine or aldimine reaction of the additives, or they may be a polymer containing a carbonyl or amine moiety and a small molecular weight additive compound that will react with the moiety on the polymer to form a ketimine or aldimine.

    摘要翻译: 羰基化合物如醛和酮与胺反应产生酮亚胺或醛亚胺和水副产物。 当在聚合物组合物中发生酮亚胺或醛亚胺反应时,由于水的释放,聚合物变得发泡。 因此,可以将羰基和胺化合物引入聚合物组合物中以用作原位发泡剂。 含羰基和胺的化合物可以是不同的聚合物,它们将通过酮亚胺或醛亚胺键组合以形成接枝共聚物,它们可以是小分子量的添加剂,其被放置在组合物中,其中待发泡的聚合物为 或者它们可以是含有羰基或胺部分和小分子量添加剂化合物的聚合物,其将与聚合物上的部分反应以形成酮亚胺或醛亚胺。

    Mixing process for generating in-situ reinforced thermoplastics
    4.
    发明授权
    Mixing process for generating in-situ reinforced thermoplastics 失效
    用于产生现场加固热塑性的混合工艺

    公开(公告)号:US5225488A

    公开(公告)日:1993-07-06

    申请号:US694123

    申请日:1991-05-01

    摘要: A method for blending polymeric materials includes the steps of producing a melt stream of a first polymer from a first extruder (12) and a separate melt stream of a second polymer from a second extruder (14), joining the melt streams at a T-junction (16), distributing the first polymer within said second polymer using a static mixer (10), and extruding the blend through a die (18). In particular, using this method liquid crystal polymer fiber reinforcement can be formed in-situ within a matrix material.

    摘要翻译: 用于混合聚合材料的方法包括以下步骤:从第一挤出机(12)和第二挤出机(14)的第二聚合物的单独熔体流产生第一聚合物的熔体流, (16),使用静态混合器(10)将所述第一聚合物分散在所述第二聚合物内,并通过模具(18)挤出所述共混物。 特别地,使用该方法可以在基质材料内原位形成液晶聚合物纤维增强体。