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首页> 外文期刊>Polimery >Characterization of Physicochemical Properties of the Inorganic Components in the 'Core-Shell'-Structured Polymer Mixturees. Part I. The Precipitated Silica Systems
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Characterization of Physicochemical Properties of the Inorganic Components in the 'Core-Shell'-Structured Polymer Mixturees. Part I. The Precipitated Silica Systems

机译：“核壳”结构聚合物混合物中无机组分的理化性质表征。第一部分：沉淀二氧化硅系统

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摘要

Novel type dispersoids of the "core-shell" structure, viz., ZnO/SiO_2 systems containing 1,4,8,12 or 20 wt.% ZnO, were prepared by wet-impregnating the (Zeosil 175 MP and Ultrasil VN2) precipitated silicas with aqueous solutions of Zn(NO_3)_2, Zn(CH_3COO)_2 and Zn(NH_30_4(NO_3)_2. The systems were examined by EDX, ICP, adsorptive static method, XRD and FTIR to determine physicochemical properties. The wet-impregnation technique enabled the ZnO/SiO_2 systems to be prepared with the intended ZnO percentages incorporated regardless of the nature of the zinc salt used (Talbe 5.) EDX showed the surface layer to contain more ZnO than assumed (Table 3). As the ZnO percentage rose, the specific surface of the ZnO/SiO_2 system decreased, whereas its capillary structure reamined unaffected (Table 7). XRD showed the ZnO the ZnO deoposited on precipitated silica to be amorphous and to be more dispersed which makes the ZnO/SiO_2 systems suitable as activators, crosslinkers, and white fillers.
机译：通过湿法浸渍沉淀的（Zeosil 175 MP和Ultrasil VN2）制备新型的“核-壳”结构的类固醇，即含有1、4、8、12或20 wt。％ZnO的ZnO / SiO_2系统。 Zn（NO_3）_2，Zn（CH_3COO）_2和Zn（NH_30_4（NO_3）_2）水溶液中的有机硅，用EDX，ICP，吸附静态法，XRD和FTIR对体系进行了检测，以确定其理化性质。技术使ZnO / SiO_2系统的制备与所预期的ZnO百分含量成正比，而与所使用的锌盐的性质无关（表5）。EDX显示表面层中所含的ZnO比假定的要多（表3）。上升时，ZnO / SiO_2系统的比表面积下降，而其毛细管结构未受影响（表7）。XRD显示ZnO，ZnO沉积在沉淀的二氧化硅上是无定形的且分散性更强，这使得ZnO / SiO_2系统适合作为活化剂，交联剂和白色填充剂。

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