WETTING PROPERTIES OF ACRYLIC AND METHACRYLIC POLYMERS CONTAINING FLUORINATED SIDE CHAINS
WETTING PROPERTIES OF ACRYLIC AND METHACRYLIC POLYMERS CONTAINING FLUORINATED SIDE CHAINS
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DOI：
10.1021/j100812a518
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发表时间：
1962-06
期刊：
影响因子：
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通讯作者：
M. K. Bernett;W. Zisman
中科院分区：
文献类型：
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作者：
M. K. Bernett;W. Zisman
讨论 根据上述证据，当碘化汞吸附在活性吸附剂氧化铝上而不是氟化钠上时，从红色到黄色的非常显着的颜色转变显然不仅仅是由于颗粒尺寸的变化。吸附前后涉及两个不同且稳定的阶段。黄色在氧化铝上的稳定性非常显着；在真空烘箱中加热到130℃几个小时后，没有观察到分解的痕迹，而碘化汞的黄色变体本身在这种情况下会大量分解。光谱反射率测量以及光学和 X 射线衍射数据都表明存在多晶型转变，并且排除了 Weitz 和 Schmidt 提到的任何类型的电离。 1 2 据认为，碘化汞在氧化铝上吸附时释放的能量将红色、稳定的变体转变为黄色形式，只要排除水分，在氧化铝晶体场的极化作用的影响下，黄色形式就继续以吸附状态存在。
Discussion On the basis ofthe evidence reported above, the very marked color transformation from red to yellow, when mercuric iodide is adsorbed on the active adsorbent alumina but not on sodium fluoride, obviously is not due simply to a change in particle size. Two distinct and stable phases are involved before and after adsorption. The sta-bility of the yellowform on alumina is quite re-markable; no trace of decomposition could be observed on heating to 130 in a vacuum oven for several hours, whereas theyellow modification of mercuric iodide itself decomposes substantially under these circumstances. The spectral reflectance measurements as well as the optical and X-ray diffraction data all point to a polymorphic conversion and to the exclusion of any ionization of the type referred to by Weitz and Schmidt. 1 2 It is believed that the energy released on adsorp-tion of mercuric iodide on alumina transforms the red, stable modification to the yellow form, which continues to exist as such in the adsorbed state, as long as moisture is excluded, underthe influence of the polarizing action of the crystal field of the alumina.