陽イオン界面活性剤の熱安定性について : 界面活性剤の合成と性能に関する研究 (第12報)

概要

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The thermal decomposition of various types of cationic surface active agents (CSA) with a long chain of alkyl group at 180°C were studied. The volumetric titration by Sodium Tetraphenylborate using Methyl Orange as an indicator was applied to the analysis of CSA. Other determining methods did not afford the accurate results to the analysis of various types of CSA. The thermal decomposition rates of C12H25N+ (CH3) 2C2H4OH, A- containing various anion ; F-, Cl-, Br-, I-, 1/2 SO4--, NO3-, H2PO4-, ClO4-, CH3COO-, CCl3COO-, C11H23COO-, 1/2 (COO-) 2, _??_-COO- and CH3-_??_-SO3- were determined. CSA containing ClO4-, CH3-_??_-SO3-, NO3- and I- were superior to others. By arranging CSA of hydrogen halide in the order of heat stability, the following result was obtained ; I->Br->>Cl->F-. This ordering supports C.K. Ingolds decomposition mechanism of CSA (J. Chem. Soc., 1933, 526). Organic acid salts showed poor heat stability. Chemical constitution of cationic parts of CSA did not so affect as were anionic parts.
社団法人日本油化学会の論文