Abstract
Two bispseudoureas, bis(2-oxazolin-2-yl)piperazine and bis bis(2-oxazolin-2-yl)homopiperazine were prepared and their double isomerization polymerization was carried out, which yielded linear polymers containind cyclic urea units. During the reaction, all three rings of the monomers open and two cyclic urea rings are newly formed
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