特殊型界面活性剤の研究 (第4報) : n-ドデシル化合物とアクリル酸メチルとのテロマーおよびそのけん化物の合成と性質について

概要

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Solution polymerization of methyl acrylate was carried out using 1-dodecanol (ROH), 1-chloro dodecane (RCl), 1-dodecanoic acid (RCOOH), 1-dodecyl amine (RNH2), or 1-dodecane thiol (RSH) as solvent and benzoyl peroxid (BPO) as an initiator. When ROH, RCl or RCOOH was used as solvent the degree of polymerization of telomers (LO, LC and LA series) obtained were 1022 and ROH was the most excellent solvent in point of yield and low degree of polymerization. On the other hand, use of RNH2 as solvent gave N, N-didodecyl-β-amino propionamide (LN-A) and its polymer (LN-AA), while use of RSH as solvent yielded 1 : 1-addition product, disulfide and telomer (Pn=2.4). The chemical structures of these products were determined by their molecular weight, elementary analyses and IR spectra. These telomers were treated with water-acetone alkaline solution to obtain the corresponding polyacrylic acid. The surface active properties of these saponified telomers are as follows : Their surface tension generally showed a high value, but high saponified LO series had a low value (<30 dyne/cm). Relation between cmc and Pn of LO series was log cmc=0.0549PPn-1.80. Low saponified telomers showed good value on emulsifying, but bad on dispersing power.
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