酢酸ビニルと無水マレイン酸をモノマ-とするコテロマ-及びコポリマ-型界面活性剤の合成とその性質

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Copolymerization of vinyl acetate with maleic anhydride in 1-dodecanethiol, carbon tetrachloride or benzene in the presence of α, α'-azobisisobutyronitrile as an initiator afforded cotelamer LS, cotelomer C, end copolymer P, respectively, as shown below. _??_ R=C12H25S, W=H (LS-series), R=CCl3, W=CI (C-series) and R, W : unknown (P-series) These cotelomers and copolymers were treated with aqueous sodium hydroxide, ammonia or n-dodecylamine to give corresponding cotelomeric or copolymeric surfactants having OH, C02Na, CO2Na, or CONHC12H25 functions : _??_ c=d=0 (S-derivatives), c≠0, d=0 (A-derivatives) and c≠0, d≠0 (D-derivatives) Their structures were deduced from the molecular weight measurements, elemental analyses, and IR spectra. They showed surface active properties as follows. 1) The surface tension of LS-S as well as LS-A were 4043 dyn/cm at pH 1. 2) The cmc of LS-S was correlated with the degree of polymerization (Pn) by cmc=0.16 Pn -0.4 (at Pn=9.828.6). 3) LS-D had cmc of 10-2 wt% in the neutral pH range. 4) LS-S showed CaCO3 dispersion ability of ca. 75% at the concentration of 10-3 wt%. 5) S and A derivatives in the LS, C and P series formed water insoluble complexes with Hg2+ and Fe3+ at pH 1 as well as with Pb2+ at pH 3, while D-derivatives formed water insoluble complexes at pH 3 with various metal ions except Fe3+.