Chain architecture polymer properties, increasing

Living polymerization processes pave the way to the macromolecular engineering, because the reactivity that persists at the chain ends allows (i) a variety of reactive groups to be attached at that position, thus (semi-)telechelic polymers to be synthesized, (ii) the polymerization of a second type of monomer to be resumed with formation of block copolymers, (iii) star-shaped (co)polymers to be prepared by addition of the living chains onto a multifunctional compound. A combination of these strategies with the use of multifunctional initiators andtor macromonomers can increase further the range of polymer architectures and properties. 

In addition to exploring homopolymers of PPV, researchers have examined many other variables in an effort to increase their performance in PLEDs. Specifically, researchers have looked at copolymerization and chain architecture as a way to tune the properties of the materials. They also determined that energetic disorder and the morphology of the film spun from the polymer solutions had a large impact on the efficiency of the device. Each of these variables as they relate to PPV-based polymers will be discussed briefly in the following sections. 

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