Recentlywe investigated the inter-polyelectrolyte reactions of poly(methacry1ic acid)-block-poly(l-methyl-4-vinylpyridinium chloride) with respect to anionic, cationic and non-ionic polymers. The complexation reactions of a block-polyampholyte with surfactants and dye molecules were also considered ').In the present communication the intra-and interpolyelectrolyte reactions of a nearly equimolar block-polyampholyte poly(methacry1ic acid)-block-poly(1-methyl-4-vinylpyridinium chloride) (1) are studied.

It is well-known that polyelectrolytes interact with various low-and highmolecular-weight substances and form interpolyelectrolyte complexes (PEC) which usually precipitate from aqueous solution The preparation of thin films or membranes from PEC is a multistage process and includes the separation of the precipitate, its dissolution in a ternary mixture consisting of water, organic solvents and neutral salts, casting, removal of solvents and sometimes thermal treatment of the films 5 -8 ) . Polymer-surfactant composite films were prepared by casting the solution of polycomplexes in common halogenated organic solvents g). By means of differential scanning calorimetry (DSC) and electron paramagnetic resonance (EPR) it was shown that the films are composed of lipid multilamellae in which lipids aggregate in a manner similar to lipid bilayers.Reactions in which polyelectrolyte complexes are formed and which proceed on a dimeric interface represent a new method for the synthesis of various types of membranes and thin films and so far have not yet been considered. In the present communication the results of complex formation on a dimeric interface between poly(2-vinylpyridine) (P2VP) and sodium polystyrenesulfonatea) (PSS), sodium dodecylsulfonate (SDS), metal salts are discussed. Experimental partPoly-2-vinylpyridine (weight-average molecular weight a,-= 3,4 . lo') and sodium polystyrenesulfonate (poly[sodium 1 -(4-~ulfonatophenyl)ethylene] (M, = 3 . lo' ) were purchased from "Polyscience" (USA) and used without purification. Reagent-grade sodium dodecylsulfonate (SDS), LiCIO,, LiJ, AgNO, and Cu(NO,), 6H,O were used. Potentiometric and conductometric titrations were carried out on the digital pH-meter OP-211/1 and conductometer OK-102/1 (Hungary) at room temperature. Complex-forming reactions on the dimeric interface were performed as follows:To the aqueous solution of the water-soluble component the benzene solution of poly(2-vinylpyridine) was added gradually at constant stirring with 200 r.p.m. so that the surface of the aqueous solution was fully covered by the organic solution. The formation of thin films or membranes occurs immediately. The thickness of the films depends on the concentration of the a) Systematic IUPAC name: poly[sodiurn 1 -(4-sulfonatophenyl)ethylene].

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The substitution in polymer, -fluorescence dye-competitor systems was investigated by measurement of the dye fluorescence. It is ascertained that the main factor affecting the direction of the possible reaction is the nature of the competitor. According to their ability to substitute dyes, different competitors can be arranged in the following series: polyelectrolytes > nonionic polymers 2 surfactants > metal ions.