Dendritic and Hyperbranched Poly phenylene s

The results presented up to here concern only one-dimensional oligomers and polymers of the PPP-type. This section is mainly focussed on the electronic properties of extended Ti-chains and on the morphology of solid PPPs using chain-stiffness as a structure-forming principle for supramolecular architectures. 

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Dendrimers have structures similar to that of hyperbranched polymer and can be taken as the perfectly branched polymer with monodispersity. However, they need to be prepared by a multistep procedure. Therefore, very little work has been done on dendritic polyfarylcnc ether)s. Morikawa et al. prepared a series of monomers with a various number of phenylene units.164,165 These monomer were used to prepare poly(ether ketone) dendrons with graded structures (Scheme 6.24). 

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