The confirmation of the formation of clathrate-like hydrates of poly(tetrabutylammonium ethenesulfonate) and of poly(tetraisopentylammonium ethenesulfonate) |
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Authors: | H. Nakayama M. Yamanobe K. Baba |
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Affiliation: | (1) Division of Materials Science and Chemical Engineering, Faculty of Engineering, Yokohama National University, Tokiwadai, Hodogaya-ku, 240 Yokohama, Japan |
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Abstract: | A thermal method using differential scanning calorimeter has been applied to aqueous solutions of a series of poly(tetraalkylammonium ethenesulfonates) (R4NPES). It was found that only the salts withR=n-C4H9 andR=i-C5H11 could form stable hydrates having large hydration numbers. The melting point and hydration numbers of these two hydrates were 12.0°C and 30±1 for the (n-C4H9)4NPES hydrate and 16.0°C and 53±2 for the (i-C5H11)4NPES hydrate, respectively. It was concluded that these hydrates were clathrate-like essentially similar to such hydrates as (n-C4H9)4NF·30H2O and (i-C5H11)4NF·40H2O. |
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Keywords: | clathrate-like hydrates DSC |
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