Abstract
Highly branched aromatic polyamides characterized by stiff trifunctional branchpoints connected by rigid rodlike segment are prepared by one-step polycondensation and studied in their pregell and postgel states. It is shown that the nature of the growing one-step rigid aggregates in the pregel state is consistent with the fractal model and that because of of the branchpoint and segmental rigidity and the rather large average length of the segments between branch-points, the rigid one. Step fractals are remarkably porous on the scale of the solvent molecules
Published Version
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