ARTICLES HAVING ENHANCED WETTABILITY
    21.
    发明申请
    ARTICLES HAVING ENHANCED WETTABILITY 审中-公开
    具有增强湿度的文章

    公开(公告)号:US20100034335A1

    公开(公告)日:2010-02-11

    申请号:US11612946

    申请日:2006-12-19

    Abstract: Articles having surfaces with enhanced wetting properties are presented. One embodiment is an article having a surface configured for promoting a phase transformation from a liquid phase to a vapor phase. The article comprises an element comprising a surface disposed to be in contact with a liquid to be transformed to a vapor, and the surface comprises a plurality of surface features having a median feature size, a, and a median feature spacing, b, such that the ratio b/a is up to about 8. The surface comprises a material disposed to contact the liquid, and this material has a nominal wettability sufficient to generate a nominal contact angle of up to about 80 degrees with a drop of the liquid. Another embodiment is a fuel rod for a nuclear reactor comprising a surface configured as described above.

    Abstract translation: 呈现具有增强润湿性能的表面的制品。 一个实施例是具有被配置用于促进从液相到气相的相变的表面的制品。 该物品包括一个元件,该元件包括被设置为与待转化成蒸汽的液体接触的表面,并且该表面包括具有中值特征尺寸a和中间特征间距b的多个​​表面特征,使得 比率b / a高达约8.该表面包括设置为接触液体的材料,并且该材料具有足以产生高达约80度的标称接触角的标称润湿性并且具有一滴液体。 另一实施例是用于核反应堆的燃料棒,其包括如上所述配置的表面。

    Method of making block copolymers by solid state polymerization
    24.
    发明授权
    Method of making block copolymers by solid state polymerization 有权
    通过固态聚合制备嵌段共聚物的方法

    公开(公告)号:US06960641B2

    公开(公告)日:2005-11-01

    申请号:US10743241

    申请日:2003-12-22

    CPC classification number: C08G63/64 C08G63/80

    Abstract: A method of preparing block copolymers by solid state polymerization is described. A mixture of a partially crystalline polycarbonate having activated terminal aryloxy groups, for example terminal methyl salicyl groups, when heated together with an oligomeric polyester having reactive terminal hydroxy groups under solid state polymerization conditions affords block copolymers. The activated terminal aryloxy groups play a key role in preserving the block lengths of the starting materials. A control sample in which the partially crystalline polycarbonate lacks activated terminal aryloxy groups, for example polycarbonates substituted by phenol, affords a much lower molecular weight, more highly randomized copolymer product. The product block copolymers are useful as “weatherable” plastic materials.

    Abstract translation: 描述了通过固态聚合制备嵌段共聚物的方法。 当在固态聚合条件下与具有反应性末端羟基的低聚聚酯一起加热时,具有活化的末端芳氧基的部分结晶的聚碳酸酯,例如末端甲基水杨酸酯的混合物得到嵌段共聚物。 活化的末端芳氧基在保留原料的块长度方面起关键作用。 其中部分结晶聚碳酸酯缺乏活化的末端芳氧基的对照样品,例如被苯酚取代的聚碳酸酯,得到低得多的分子量,更高度随机的共聚物产物。 产品嵌段共聚物可用作“耐候性”塑料材料。

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