Thermal stability of some metal-palmitate soaps which find various industrial applications

Thermal Behavior of the Divalent Metal Soaps of Flax, Hemp, and Safflower Seed Oils

“…This was not the case for the Zn metal soaps, as Zn-SFO recorded the highest loss (13%), while Zn-FSO and Zn-HSO recorded 8.8 and 12% losses, respectively. Studies , indicate that the basicity of the metal has a role to play in the thermal decomposition process: the more basic, the less thermally stable. This seems a plausible explanation for the initial thermal stability of barium soaps up to temperatures above 300 °C.…”

“…In TGA, typical mass loss profiles are analyzed for the amount or percent of mass loss at any given temperature, the amount or percent of the noncombusted residue at some final temperature, and the temperature of various degradation steps. Metal soaps are of different types based on the metal ion and alkyl chain structure, among others, and so may account for the diverse thermal properties …”

“…Previous reports 17,18 have shown that barium soaps of vegetable oils are more thermally stable than other divalent metal soaps such as Zn, Cd, and Ca commonly used for the thermal stabilization of PVC. The residual mass of the metal soaps at 600 °C was also used to assess the relative thermal stability of the metal soaps prepared from vegetable oils.…”

“…Metal soaps are of different types based on the metal ion and alkyl chain structure, among others, and so may account for the diverse thermal properties. 17 All of the metal soaps are thermally stable up to temperatures above 220 °C, as less than 5% mass loss recorded in the initial stage is as a result of moisture present in the system. Ba-HSO, Ba-SFO, and Zn-FSO appear to have exhibited more stability as the temperatures at which 30 and 50% weight loss are attained are the highest.…”