Abstract
AbstractA new class of water‐soluble poly(amido‐amine)s (PAA's) carrying poly(oxyethylene) (PEO) side chains were synthesized following two distinct pathways. The first route consists in the direct stepgrowth polymerization through addition in water of an equimolar amount of α‐(2‐aminoethyl)‐ω‐methoxypoly(oxyethylene) (6) of well‐defined molecular weight to 1,4‐bis(acryloyl)‐piperazine (7). Furthermore, this reaction was performed in the presence of an excess of the bisacrylmonomer 7, resulting in a new bisacrylic macromonomer (9) of PEO. In the second route this bisadduc 9 was then polymerized with piperazine (10), yielding a PEO‐grafted PAA. The structures of both polymers were characterized by means of 1H NMR. Viscosity and vapour pressure osmometric measurements revealed that the molecular weights in both cases were fairly low (M̄n ≈ 3 000).
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