Microgravity formation of polymeric networks
    1.
    发明授权
    Microgravity formation of polymeric networks 失效
    聚合网络的微重力形成

    公开(公告)号:US5399304A

    公开(公告)日:1995-03-21

    申请号:US900807

    申请日:1992-06-17

    摘要: The present invention is directed to improving thermoplastic and cross-linked polymeric networks. The inventive method comprises forming the polymeric network under gravitational conditions comprising from about 10.sup.-6 to about 10.sup.-2 g. Three modes of energy transfer have been recognized, inter alia, conduction, convection, and radiation. Polymeric networks formed under microgravity conditions (defined herein as gravitational conditions comprising from about 10.sup.-6 to about 10.sup.-2 g) do not obviate conduction and radiation modes of energy transfer. Convection energy transfer, however, is gravity dependent. Thus, convection currents can be suppressed in thermoplastic and cross-linked polymeric networks during network formation by forming the network under microgravity conditions. Suppression of convection currents reduces the incidences of voids in solvent cast thermoplastic polymeric membranes, which forms yet another aspect of the present invention. Particulate-filled thermoplastic and cross-linked polymeric networks will exhibit a more homogeneous distribution of particulates in the network by forming the network under microgravity conditions also, which forms yet a further aspect of the present invention.

    摘要翻译: 本发明涉及改进热塑性和交联聚合物网络。 本发明的方法包括在包含约10-6至约10-2g的重力条件下形成聚合物网络。 已经认识到三种能量转移模式,特别是传导,对流和辐射。 在微重力条件(本文定义为包含约10-6至约10-2g的重力条件)下形成的聚合物网络不消除能量传递的传导和辐射模式。 然而,对流能量转移是重力依赖的。 因此,通过在微重力条件下形成网络,可以在网络形成期间在热塑性和交联聚合物网络中抑制对流。 对流的抑制降低了溶剂浇铸热塑性聚合物膜中空隙的发生率,这形成了本发明的另一方面。 颗粒填充的热塑性和交联聚合物网络将通过在微重力条件下形成网络而在网络中表现出更均匀的颗粒分布,这也形成了本发明的另一方面。

    Thermal refractive materials for optical sensor application
    2.
    发明授权
    Thermal refractive materials for optical sensor application 失效
    用于光学传感器应用的热折射材料

    公开(公告)号:US5052820A

    公开(公告)日:1991-10-01

    申请号:US393977

    申请日:1989-08-15

    IPC分类号: G01K11/00 G01K11/12

    摘要: Improved thermooptical sensing devices are provided wherein at various predetermined sectons of an optical fiber is juxtaposed a material characterized by a temperature dependent index of refraction. This material forms a temperature sensitive area which controls the transmission of light through the optical fiber thereby allowing detection of temperature changes along the fiber. The materials may be crystalline thermoplastic polymers, modified organic polymers containing inorganic modifiers, polymer systems containing discrete phases of organic polymers and inorganic additives or thermochromic inorganic compounds.

    摘要翻译: 提供了改进的光学光学传感装置,其中在光纤的各种预定部分处并列有以温度依赖折射率为特征的材料。 该材料形成温度敏感区域,其控制通过光纤的光的透射,从而允许检测沿着光纤的温度变化。 该材料可以是结晶热塑性聚合物,含有无机改性剂的改性有机聚合物,含有有机聚合物的离散相的聚合物体系和无机添加剂或热变色无机化合物。

    Soft-goods type, formable orthopaedic cast
    4.
    发明授权
    Soft-goods type, formable orthopaedic cast 失效
    软货物类型,成形矫形器

    公开(公告)号:US4996979A

    公开(公告)日:1991-03-05

    申请号:US420920

    申请日:1989-10-13

    IPC分类号: A61F5/058 A61F13/04

    CPC分类号: A61F13/04 A61F5/05841

    摘要: A soft goods type foldable, wrappable sleeve orthopedic cast immobilizes and conforms to the shape and configuration of a limb, or other part of the anatomy. The soft-goods type cast assembly is initially specially formed or configured to specifically fit a selected portion of the anatomy of a patient. The cast conforms to the anatomy through the use of airtight and moisture-proof pouches which encapsulate either (1) open cell or fiberglass matrices impregnated with a water-activated hardenable pre-polymer, or (2) the entire assembly. After the tightening of the cast around the limb, the application of water activates the urethane polymer which conforms to the configuration of the limb encased. Supplemental bendable ribs may be employed to splint the limb prior to activation of the hardenable material. The soft goods type cast is held in place by straps, and may be removed or adjusted by releasing or tightening the straps. The splinting elements may be removed and replaced. An inlet duct may have a capsule in it with some of the chemical material which aids in polymerization of the urethane. A venting duct may also be provided to permit the escape of air or gases. The water activated pre-polymer material may include two isocyanate pre-polymers of significantly different viscosities and equivalent weights.

    摘要翻译: 柔软的货物类型可折叠,可包装的袖口矫形器固定并符合肢体或解剖结构的其他部分的形状和构型。 软货物铸造组件最初被特别地形成或构造成特别地适合患者的解剖结构的选定部分。 铸件通过使用气密和防潮袋,符合解剖学,其中包括(1)用水激活的可硬化预聚物浸渍的开孔或玻璃纤维基体,或(2)整个组件。 在围绕肢体收紧铸件之后,水的使用激活了符合肢体包裹构型的聚氨酯聚合物。 可补充的可弯曲肋条可在活化可硬化材料之前夹住肢体。 软质铸件通过带子固定在适当位置,可以通过松开或拉紧带子来移除或调整。 可以去除和更换夹板元件。 入口管道可以在其中具有胶囊,其中一些化学材料有助于聚氨酯的聚合。 还可以设置排气管以允许空气或气体逸出。 水活化的预聚物材料可以包括具有显着不同粘度和当量重量的两种异氰酸酯预聚物。