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Synthesis and characterization of dendritic and hyperbranched polymers based on urea linkages

Dendrimers and hyperbranched polymers are a unique class of macromolecules due to their unusual structure and properties. Although synthetic methods are significantly improved, further development of new methods for synthesis of dendritic macromolecules is necessary before these materials can be used for practical applications. Divergent and convergent growth, the two most widely used synthetic approaches are tedious due to protection-deprotection steps and column chromatographic purification. This thesis presents an efficient synthetic approach for dendrimers which eliminates protection-deprotection steps and chromatographic purification. Central theme of the work is the design of an efficient synthesis for soluble and functional dendritic wedges and hyperbranched polymers based on urea linkages using in situ generation of aromatic isocyanate by thermal decomposition of aromatic acyl azide via Curtius rearrangement and its orthogonality with amine. More Info

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