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    Essentially linear, thermoplastic poly (amino-s-triazines)s and process for the production thereof
    31.
    发明授权
    Essentially linear, thermoplastic poly (amino-s-triazines)s and process for the production thereof 失效
    基本上是线性的，热塑性聚（氨基-s-三嗪）和其生产方法

    公开(公告)号：US4562246A

    公开(公告)日：1985-12-31

    申请号：US589859

    申请日：1984-03-16

    申请人： David W. Wang ,  Michael M. Fisher ,  Walter M. Thomas

    发明人： David W. Wang ,  Michael M. Fisher ,  Walter M. Thomas

    IPC分类号： C08G73/06

    CPC分类号： C08G73/0644

    摘要： High molecular weight, essentially linear, thermoplastic amino-s-triazine resins having an inherent viscosity of at least about 0.55 dl./g. are disclosed, comprising recurring units of the formula: ##STR1## containing not less than 25 wt. % of triamino-s-triazine units of the formula: ##STR2## Such resins are suitable for molding or extrusion into films, fibers and filaments and for preparation of composite materials.Also disclosed is a process for the production of high molecular weight essentially linear, thermoplastic amino-s-triazine resins which comprises reacting, in contact with water, an inert, water-immiscible organic solvent for at least one of the reactants and a basic acid acceptor, substantially equimolar proportions of a triazine compound or a mixture of triazine compounds of the formula: ##STR3## with a diamine or a mixture of diamines of the formula: ##STR4## until a thermoplastic amino-s-triazine resin having an inherent viscosity of at least about 0.55 dl/g., is produced.

    摘要翻译： 具有至少约0.55dl / g的特性粘度的高分子量，基本上线性的热塑性氨基-s-三嗪树脂。 包括下式的重复单元：含有不少于25wt。 ％的下式的三氨基-s-三嗪单元：这种树脂适合于模塑或挤出成膜，纤维和长丝并用于制备复合材料。 还公开了一种生产高分子量基本上线性的热塑性氨基-s-三嗪树脂的方法，其包括与水接触使至少一种反应物和碱性酸的惰性的与水不混溶的有机溶剂 受体，基本上等摩尔比例的三嗪化合物或下式的三嗪化合物的混合物与下式的二胺或二胺的混合物直到具有特性粘度的热塑性氨基-s-三嗪树脂 至少约0.55dl / g。

    Structure analysis and defect detection system
    32.
    发明授权
    Structure analysis and defect detection system 失效
    结构分析与缺陷检测系统

    公开(公告)号：US07027136B2

    公开(公告)日：2006-04-11

    申请号：US10605994

    申请日：2003-11-12

    申请人： John C. Tsai ,  David W. Wang

    发明人： John C. Tsai ,  David W. Wang

    IPC分类号： G01N21/00

    CPC分类号： G01B11/161

    摘要： A structure analysis and defect detection system in which a laser light source provides light via optical fiber to fiber Bragg gratings that change resonant frequency as stresses change in the structure. Light at the resonant frequencies of the fiber Bragg gratings is reflected and light of other frequencies is passed. The respective reflected light is directed through a Fabry-Perot interference filter or a fiber interferometer and detected by a photodetector. If the Fabry-Perot interference filter is used, the intensity of the reflected light indicates current stress at a fiber Bragg grating. If the fiber interferometer is used, a beat frequency due to heterodyne interference in the light indicates current stress at the respective fiber Bragg grating. Comparison data for the respective characteristic in the detected light over time permits stress analysis, and comparison of such data with pre-determined limit values permits defect or failure detection.

    摘要翻译： 一种结构分析和缺陷检测系统，其中激光光源通过光纤向光纤布拉格光栅提供光，当结构中的应力变化时，其改变谐振频率。 在光纤布拉格光栅的谐振频率处的光被反射并且其它频率的光通过。 相应的反射光被引导通过法布里 - 珀罗干涉滤光器或光纤干涉仪，并由光电检测器检测。 如果使用法布里 - 珀罗干涉滤波器，则反射光强度表示光纤布拉格光栅处的电流应力。 如果使用光纤干涉仪，则由于光中的外差干扰引起的拍频表示各个光纤布拉格光栅处的电流应力。 随着时间的推移，检测光中的各个特性的比较数据允许应力分析，并且将这些数据与预定极限值进行比较允许缺陷或故障检测。