Apparatus and methods for measuring extensional rheological properties of a material
    7.
    发明授权
    Apparatus and methods for measuring extensional rheological properties of a material 有权
    用于测量材料的拉伸流变性质的装置和方法

    公开(公告)号:US06711941B2

    公开(公告)日:2004-03-30

    申请号:US09928643

    申请日:2001-08-13

    Abstract: Apparatus and methods for evaluating the rheological properties of Newtonian and non-Newtonian liquids and melts employs the principle of capillary breakup following rapid stretching of the fluid between two plates. The apparatus includes opposed surfaces defining a sample site disposed therebetween. A liquid sample undergoes an extensional deformation between the opposed surfaces which separate using a user-defined motion profile. The time profile of the diameter of the liquid filament is monitored and recorded as a function of time. Preferred embodiments of the present invention include data analysis of the diameter of the filament as a function of time which provides information regarding rheological parameters including, but not limited to, extensional viscosity versus strain.

    Abstract translation: 用于评估牛顿和非牛顿液体和熔体的流变性质的装置和方法采用在两块板之间快速拉伸流体之后毛细管断裂的原理。 该装置包括限定其间设置的样品位置的相对表面。 液体样品在使用用户定义的运动曲线分离的相对表面之间经历拉伸变形。 作为时间的函数监视和记录液体长丝的直径的时间曲线。 本发明的优选实施例包括作为时间的函数的长丝的直径的数据分析,其提供关于流变参数的信息,包括但不限于拉伸粘度对应变。

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