|Architecture of Hyperbranched Polymers via a Living Radical Polymerization and Development for Functional Nano-Materials
Department of Organic Materials and Macromolecules, Tokyo Institute of Technology Meguro-ku, Tokyo, Japan
Nippon Gomu Kyokaishi,(2008),81(3),105-111 General Review in Japanese
A novel route to hyperbranched polystyrene (HPS) from 4-vinylbenzyl N,N-diethyldithiocarbamate (VBDC) as an inimer by one-pot photopolymerization is presented. This polymerization proceeded by the self-addition living radical mechanism. Statistical branched HPS was prepared by living radical copolymerization of VBDC with styrene under UV irradiation.
Hyperbranched poly(ethyl methacrylate) (HPEM) was also prepared by self-addition living radical polymerization from 2-(N,N-diethyldithiocarbamyl)ethyl methacrylate (DCEM). These hyperbranched polymers behaved as hard spheres even in a good solvent and formed a single molecule in solution. Moreover, we have established more complex molecular architectures using inimers as starting materials such as star, star-block, alternating hyperbranched, star-hyperbranched copolymers, and reactive microspheres.
For application of functional nano-materials, we demonstrated a new class of holographic recording and structural color films constructed by hyperbranched polymers and reactive microspheres, respectively.
Hyperbranched Polymer; Living Radical Polymerization; More Complex Molecular Architecture; Hard Sphere; Holographic Recording; Structural Color Materials