Polymeric blends for sensor and actuation dual functionality
    51.
    发明授权
    Polymeric blends for sensor and actuation dual functionality 失效
    用于传感器和驱动双重功能的聚合物混合物

    公开(公告)号:US06689288B2

    公开(公告)日:2004-02-10

    申请号:US10014158

    申请日:2001-11-28

    IPC分类号: H01B112

    摘要: The invention described herein supplies a new class of electroactive polymeric blend materials which offer both sensing and actuation dual functionality. The blend comprises two components, one component having a sensing capability and the other component having an actuating capability. These components should be co-processable and coexisting in a phase separated blend system. Specifically, the materials are blends of a sensing component selected from the group consisting of ferroelectric, piezoelectric, pyroelectric and photoelectric polymers and an actuating component that responds to an electric field in terms of dimensional change. Said actuating component includes, but is not limited to, electrostrictive graft elastomers, dielectric electroactive elastomers, liquid crystal electroactive elastomers and field responsive polymeric gels. The sensor functionality and actuation functionality are designed by tailoring the relative fraction of the two components. The temperature dependence of the piezoelectric response and the mechanical toughness of the dual functional blends are also tailored by the composition adjustment.

    摘要翻译: 本文描述的本发明提供了一类新的电活性聚合物共混材料,其提供了感测和致动双重功能。 共混物包括两个组分,一个组分具有感测能力,另一个组分具有致动能力。 这些组分应该是可共处理的并且在相分离的共混体系中共存。 具体地说,这些材料是从由铁电体,压电体,热电和光电聚合物组成的组中选择的感测组件和在尺寸变化方面对电场作出响应的致动组件的共混物。 所述致动组件包括但不限于电致伸缩接枝弹性体,介电电活性弹性体,液晶电活性弹性体和场响应聚合物凝胶。 传感器功能和致动功能通过调整两个部件的相对部分来设计。 双功能混合物的压电响应的温度依赖性和机械韧性也通过组合物调节来调整。

    Molecular level coating of metal oxide particles
    52.
    发明授权
    Molecular level coating of metal oxide particles 失效
    金属氧化物颗粒的分子水平涂层

    公开(公告)号:US06368662B1

    公开(公告)日:2002-04-09

    申请号:US09495575

    申请日:2000-02-01

    IPC分类号: B05D714

    摘要: Polymer encapsulated metal oxide particles are prepared by combining a polyamide acid in a polar aprotic solvent with a metal alkoxide solution. The polymer was imidized and the metal oxide formed simultaneously in a refluxing organic solvent. The resulting polymer-metal oxide is an intimately mixed commingled blend, possessing synergistic properties of both the polymer and preceramic metal oxide. The encapsulated metal oxide particles have multiple uses including, being useful in the production of skin lubricating creams, weather resistant paints, as a filler for paper, making ultraviolet light stable filled printing ink, being extruded into fibers or ribbons, and coatings for fibers used in the production of composite structural panels.

    摘要翻译: 通过将极性非质子溶剂中的聚酰胺酸与金属醇盐溶液组合来制备聚合物包封的金属氧化物颗粒。 将聚合物酰亚胺化,同时在回流有机溶剂中形成金属氧化物。 所得聚合物 - 金属氧化物是紧密混合的混合共混物,具有聚合物和陶瓷前体金属氧化物的协同性质。 包封的金属氧化物颗粒具有多种用途,包括用于生产皮肤润滑霜,耐候性油漆,作为纸的填料,使紫外线稳定的填充油墨,被挤出成纤维或带状物,以及用于所用纤维的涂层 在复合结构板的生产中。

    Hollow polyimide microspheres
    53.
    发明授权
    Hollow polyimide microspheres 有权
    中空聚酰亚胺微球

    公开(公告)号:US5994418A

    公开(公告)日:1999-11-30

    申请号:US316865

    申请日:1999-05-21

    摘要: A shaped article composed of an aromatic polyimide has a hollow, essentially spherical structure and a particle size of about 100 to about 1500 .mu.m, a density of about 1 to about 6 pounds/ft.sup.3 and a volume change of 1 to about 20% by a pressure treatment of 30 psi for 10 minutes at room temperature. A syntactic foam, made of a multiplicity of the shaped articles which are bounded together by a matrix resin to form an integral composite structure, has a density of about 3 to about 30 pounds/ft.sup.3 and a compression strength of about 100 to about 1400 pounds/in.sup.2.

    摘要翻译: 由芳族聚酰亚胺组成的成形制品具有中空的,基本上为球形的结构,并且具有约100至约1500μm的粒度,约1至约6磅/ ft 3的密度和1至约20%的体积变化,由 在室温下压力处理30psi 10分钟。 由多个成形制品制成的复合泡沫体,其通过基质树脂结合以形成整体复合结构,其密度为约3至约30磅/英3 3,压缩强度为约100至约1400磅 / in2。

    Method of making thermally stable, piezoelectric and proelectric
polymeric substrates
    54.
    发明授权
    Method of making thermally stable, piezoelectric and proelectric polymeric substrates 失效
    制造热稳定,压电和电子聚合物基材的方法

    公开(公告)号:US5909905A

    公开(公告)日:1999-06-08

    申请号:US706122

    申请日:1996-08-30

    摘要: A thermally stable, piezoelectric and pyroelectric polymeric substrate was prepared. This thermally stable, piezoelectric and pyroelectric polymeric substrate may be used to prepare electromechanical transducers, thermomechanical transducers, accelerometers, acoustic sensors, infrared sensors, pressure sensors, vibration sensors, impact sensors, in-situ temperature sensors, in-situ stress/strain sensors, micro actuators, switches, adjustable fresnel lenses, speakers, tactile sensors, weather sensors, micro positioners, ultrasonic devices, power generators, tunable reflectors, microphones, and hydrophones. The process for preparing these polymeric substrates includes: providing a polymeric substrate having a softening temperature greater than 100.degree. C.; depositing a metal electrode material onto the polymer film; attaching a plurality of electrical leads to the metal electrode coated polymeric substrate; heating the metal electrode coated polymeric substrate in a low dielectric medium; applying a voltage to the heated metal electrode coated polymeric substrate to induce polarization; and cooling the polarized metal electrode coated polymeric electrode while maintaining a constant voltage.

    摘要翻译: 制备了热稳定的压电和热电聚合物基材。 这种热稳定的压电和热电聚合物基材可用于制备机电换能器,热机械换能器,加速度计,声传感器,红外传感器,压力传感器,振动传感器,冲击传感器,原位温度传感器,原位应力/应变传感器 微型致动器,开关,可调节菲涅尔透镜,扬声器,触觉传感器,气象传感器,微型定位器,超声波设备,发电机,可调谐反射器,麦克风和水听器。 制备这些聚合物基材的方法包括:提供软化温度大于100℃的聚合物基材; 将金属电极材料沉积到聚合物膜上; 将多个电引线附接到涂覆有金属电极的聚合物基底上; 在低电介质介质中加热金属电极涂覆的聚合物基材; 向加热的金属电极涂覆的聚合物基底施加电压以引起极化; 并且在保持恒定电压的同时冷却极化金属电极涂覆的聚合物电极。

    Solvent resistant copolyimide
    55.
    发明授权
    Solvent resistant copolyimide 失效
    耐溶剂共聚酰亚胺

    公开(公告)号:US5478916A

    公开(公告)日:1995-12-26

    申请号:US299384

    申请日:1994-09-01

    摘要: A solvent resistant copolyimide was prepared by reacting 4,4'-oxydiphthalic anhydride with a diaimine blend comprising, based on the total amount of the diamine blend, about 75 to 90 mole percent of 3,4'-oxydianiline and about 10 to 25 mole percent p-phenylene diamine. The solvent resistant copolyimide had a higher glass transition temperature when cured at 350.degree. , 371.degree. and 400.degree. C. than LaRC.TM.-IA. The composite prepared from the copolyimide had similar mechanical properties to LaRC.TM.-IA. Films prepared from the copolyimide were resistant to immediate breakage when exposed to solvents such as dimethylacetamide and chloroform. The adhesive properties of the copolyimide were maintained even after testing at 23.degree., 150.degree., 177.degree. and 204.degree. C.

    摘要翻译: 通过使4,4'-氧联二邻苯二甲酸酐与二亚胺混合物反应制备耐溶剂的共聚酰亚胺,该二亚胺共混物包含基于二胺共混物的总量的约75至90摩尔%的3,4'-氧二苯胺和约10至25摩尔 对苯二胺百分比。 耐溶剂的共聚酰亚胺在350℃,371℃和400℃下比LaRC TM -IA固化时具有较高的玻璃化转变温度。 由共聚酰亚胺制备的复合材料与LaRC TM -IA具有相似的机械性能。 从共聚酰亚胺制备的薄膜当暴露于溶剂如二甲基乙酰胺和氯仿时,可立即破裂。 甚至在23°,150°,177°和204°C下,保持共聚酰亚胺的粘合性能。

    Low dielectric polyimides
    57.
    发明授权
    Low dielectric polyimides 失效
    低介电聚酰亚胺

    公开(公告)号:US5428102A

    公开(公告)日:1995-06-27

    申请号:US237712

    申请日:1994-05-02

    IPC分类号: C08G73/10 C08L79/08

    CPC分类号: C08G73/1007

    摘要: A series of polyimides based on the dianhydride of 1,4-bis(3,4-dicarboxyphenoxy)benzene (HQDEA) or on 2,2-bis[4(3-aminophenoxy)phenyl]hexafluoropropane (3-BDAF) are evolved from high molecular weight polyamic acid solutions yielding flexible free-standing films and coatings in the fully imidized form which have a dielectric constant in the range of 2.5 to 3.1 at 10 GHz.

    摘要翻译: 一系列基于1,4-双(3,4-二羧基苯氧基)苯(HQDEA)二酐或2,2-双[4-(3-氨基苯氧基)苯基]六氟丙烷(3-BDAF)的二酰亚胺衍生自 高分子量聚酰胺酸溶液产生柔性自立膜和完全酰亚胺化形式的涂层,其在10GHz下的介电常数范围为2.5至3.1。

    Polyimides containing pendent siloxane groups
    58.
    发明授权
    Polyimides containing pendent siloxane groups 失效
    含有侧链硅氧烷基团的聚酰亚胺

    公开(公告)号:US5304627A

    公开(公告)日:1994-04-19

    申请号:US970755

    申请日:1992-11-02

    摘要: Novel polyimides containing pendent siloxane groups (PISOX) were prepared by the reaction of functionalized siloxane compounds with hydroxy containing polyimides (PIOH). The pendent siloxane groups on the polyimide backbone offer distinct advantages such as lowering the dielectric constant and moisture resistance and enhanced atomic oxygen resistance. The siloxane containing polyimides are potentially useful as protective silicon oxide coatings and are useful for a variety of applications where atomic oxygen resistance is needed.

    摘要翻译: 通过官能化的硅氧烷化合物与含羟基的聚酰亚胺(PIOH)的反应制备了含有侧链硅氧烷基团(PISOX)的新型聚酰亚胺。 聚酰亚胺骨架上的侧链硅氧烷基团提供了明显的优点,例如降低介电常数和耐湿性以及增强的原子氧电阻。 含硅氧烷的聚酰亚胺可用作保护性氧化硅涂层,并且可用于需要原子氧电阻的各种应用。

    Polyimide processing additives
    59.
    发明授权
    Polyimide processing additives 失效
    聚酰亚胺加工助剂

    公开(公告)号:US5272248A

    公开(公告)日:1993-12-21

    申请号:US892058

    申请日:1992-05-22

    摘要: A process for preparing polyamides having enhanced melt flow properties is described. The process consists of heating a mixture of a high molecular weight poly(amic acid) or polyimide with a low molecular weight amic acid or imide additive in the range of 0.05 to 15% by weight of additive. The polyimide powders so obtained show improved processability, as evidenced by lower melt viscosity by capillary rheometry. Likewise, films prepared from mixtures of polymers with additives show improved processability with earlier onset of stretching by TMA.

    摘要翻译: 描述了一种制备具有增强的熔体流动性能的聚酰胺的方法。 该方法包括将高分子量聚(酰胺酸)或聚酰亚胺与低分子量酰胺酸添加剂的混合物加入0.05至15重量%的添加剂。 如此获得的聚酰亚胺粉末显示出改进的加工性能,如通过毛细管流变测定法的较低熔体粘度所证明的。 同样,由聚合物与添加剂的混合物制备的薄膜也显示改善的加工性能,并且通过TMA早期开始拉伸。

    Polyimides containing the cyclobutene-3, 4-dione moiety
    60.
    发明授权
    Polyimides containing the cyclobutene-3, 4-dione moiety 失效
    含有环丁烯-3,4-二酮部分的聚酰亚胺

    公开(公告)号:US5212283A

    公开(公告)日:1993-05-18

    申请号:US845090

    申请日:1992-03-03

    IPC分类号: C08G73/10

    CPC分类号: C08G73/1067 Y10T428/31721

    摘要: Linear aromatic polyimides containing the cyclobutene-3,4-dione moiety were produced by reacting 1,2-bis(4-aminoanilino)cyclobutene-3,4-dione with several aromatic dianhydrides. The resulting polymers exhibited glass transition temperatures greater than 500.degree. C., adhered tenaciously to glass, and became more flexible after heating for 1 hour at 300.degree. C.

    摘要翻译: 通过1,2-双(4-氨基苯胺基)环丁烯-3,4-二酮与若干芳族二酐反应制备含有环丁烯-3,4-二酮部分的线性芳族聚酰亚胺。 所得聚合物显示出大于500℃的玻璃化转变温度,坚韧地粘附到玻璃上,并且在300℃下加热1小时后变得更柔韧。