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    • 1. 发明授权
    • Non-destructive method for determining the extent of cure of a
polymerizing material and the solidification of a thermoplastic polymer
based on wavelength shift of fluroescence
    • 用于确定聚合材料的固化程度和基于荧光波长漂移的热塑性聚合物固化的非破坏性方法
    • US5598005A
    • 1997-01-28
    • US389823
    • 1995-02-15
    • Francis W. WangRobert E. LowryKing-Fu Lin
    • Francis W. WangRobert E. LowryKing-Fu Lin
    • A61F2/46G01N21/64G01N33/44
    • G01N21/648A61B17/8836G01N21/64A61B2017/883G01N33/44
    • The change in the peak fluorescence wavelength of a small amount of a fluorescent compound, i.e., a fluorophore, which has been dissolved in a polymerizing material or a thermoplastic polymer is used to determine the extent of cure or solidification, respectively. The measured wavelength-shift can either be compared with a previously determined correlation to obtain an absolute value for the extent of cure, or can be utilized to compare or maintain an acceptable extent of cure throughout a manufacturing or a clinical process. Similarly, in the processing of a thermoplastic polymer by injection molding, the measured wavelength shift can either be compared with a previously determined correlation to obtain an absolute value for the temperature of the polymer, or can be utilized to adjust the injection molding cycle so that the mold is opened at the optimum times. The fluorophores used in the method are preferably selected from a class of fluorophores comprising alpha, omega substituted linear alkenes having an electron accepting group attached at the alpha position and an electron donating group attached at the omega position.
    • 使用溶解在聚合材料或热塑性聚合物中的少量荧光化合物即荧光团的峰值荧光波长的变化来分别确定固化或固化的程度。 测量的波长漂移可以与先前确定的相关性进行比较,以获得固化程度的绝对值,或者可以用于在整个制造或临床过程中比较或维持可接受的固化程度。 类似地,在通过注射成型处理热塑性聚合物时,将测量的波长偏移与先前确定的相关性进行比较以获得聚合物温度的绝对值,或者可用于调节注射成型周期,使得 模具在最佳时间打开。 在该方法中使用的荧光团优选选自一类荧光团,其包括在α位置附有电子接受基团的α,ω-取代的线性烯烃和连接在ω位置的给电子基团。