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公开(公告)号：US5431998A
公开(公告)日：1995-07-11
申请号：US61964
申请日：1993-05-14
CPC分类号： C08J9/405 , H01B1/127 , C08J2375/04 , Y10T428/249953 , Y10T428/249961 , Y10T428/249987
摘要： A dimensionally graded electroconductive and electromagnetically responsive composite material is produced by contacting a polyurethane open cell foam substrate with a solution of an oxidatively polymerizable compound, such as pyrrole, that is polymerized to form a thin electroconductive polymer coating on the foam's surfaces. The reaction, wherein the compound is oxidized and polymerized to form a conductive polymer occurs over time. By varying the amount of time the porous foam substrate is in contact with the reacting solution a graded amount of electroconductive polymer is deposited on the foam substrate. The electrical activity of the resultant electrically conducting polyurethane/polypyrrole composite foam is measured as a Free Field Transmission loss at the microwave frequency of 10 GHz and expressed in "-dB". The polyurethane/polypyrrole composite foam with dimensionally graded electrical conductivity/activity constitutes a new bulk absorber.
摘要翻译： 通过将聚氨酯开孔泡沫基材与可聚合的化合物如吡咯的溶液接触，制得尺寸分级的导电和电磁响应的复合材料，其被聚合以在泡沫表面上形成薄的导电聚合物涂层。 其中化合物被氧化和聚合以形成导电聚合物的反应随时间发生。 通过改变多孔泡沫基材与反应溶液接触的时间量，将分级量的导电聚合物沉积在泡沫基材上。 所得导电聚氨酯/聚吡咯复合泡沫体的电活性在10GHz的微波频率下测量为自由场传输损耗，并以“-dB”表示。 具有尺寸分级电导率/活性的聚氨酯/聚吡咯复合泡沫体构成新的散料吸收体。
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公开(公告)号：US5523119A
公开(公告)日：1996-06-04
申请号：US405524
申请日：1995-03-16
CPC分类号： C08J9/405 , H01B1/127 , C08J2375/04 , Y10T428/249953 , Y10T428/249961 , Y10T428/249987
摘要： A dimensionally graded electroconductive and electromagnetically responsive composite material is produced by contacting a polyurethane open cell foam substrate with a solution of an oxidatively polymerizable compound, such as pyrrole, that is polymerized to form a thin electroconductive polymer coating on the foam's surfaces. The reaction, wherein the compound is oxidized and polymerized to form a conductive polymer occurs over time. By varying the amount of time the porous foam substrate is in contact with the reacting solution a graded amount of electroconductive polymer is deposited on the foam substrate. The electrical activity of the resultant electrically conducting polyurethane/polypyrrole composite foam is measured as a Free Field Transmission loss at the microwave frequency of 10 GHz and expressed in "-dB". The polyurethane/polypyrrole composite foam with dimensionally graded electrical conductivity/activity constitutes a new bulk absorber.
摘要翻译： 通过将聚氨酯开孔泡沫基材与可聚合的化合物如吡咯的溶液接触，制得尺寸分级的导电和电磁响应的复合材料，其被聚合以在泡沫表面上形成薄的导电聚合物涂层。 其中化合物被氧化和聚合以形成导电聚合物的反应随时间发生。 通过改变多孔泡沫基材与反应溶液接触的时间量，将分级量的导电聚合物沉积在泡沫基材上。 所得导电聚氨酯/聚吡咯复合泡沫体的电活性在10GHz的微波频率下测量为自由场传输损耗，并以“-dB”表示。 具有尺寸分级电导率/活性的聚氨酯/聚吡咯复合泡沫体构成新的散料吸收体。
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