Sodium stearate appears as a white powder with a fatty odor and a greasy feel. It is soluble in hot water and ethanol, and decomposes into stearic acid and corresponding acids when exposed to acid. sodium salt. Stable under normal temperature and pressure, avoid contact with oxides. It can be slowly dissolved in cold water and cold ethanol, and very easily soluble in hot water and hot ethanol.
Sodium stearate can be used to modify hydrotalcite:
Using sodium stearate to modify magnesium aluminum carbonate hydrotalcite MgAl-CO3-LDHs (LDHs), the impact of the modification process on the thermal stability of polyvinyl chloride (PVC) was discussed, and through X-ray diffractometer (XRD), Fourier transform infrared spectrometer (FTIR), and scanning electron microscope (SEM) were used to characterize the hydrotalcite before and after modification.
The results showed that sodium stearate did not change the layered structure of hydrotalcite and was only adsorbed on the surface of hydrotalcite; the hydrotalcite wet filter cake was treated with stearin Sodium acid acid modification has the best thermal stability effect on PVC. It has little effect on the initial colorability of PVC, but can greatly extend the long-term thermal stability of PVC, extending the static thermal aging time by 57.1%.
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