Reactive Functional Side Group Block / Star Polymer Synthesis By Living Radical Polymerization Method

Atom transfer radical polymerization (ATRP) and nitroxide-mediated polymerization (NMP) were employed to control the macromolecular chain structure efficiently. In this paper we synthesize a series of living block copolymers and star polymers with functional side groups.Poly(allyl methacrylate), Poly( Y -Methacryloxypropyl trimethoxysilane), Poly(allyl methacrylate -r- n -butyl methacrylate) and Poly(allyl methacrylate )-b-Poly( Y -Methacryloxypropyl trimethoxysilane ) were synthesized via ATRP method. Allyl and organic-silicanoxane were survived in these processes and successfully introduced into macromolecular chain as side groups, which could not be achieved in traditional free radical polymerization. Silica-polymer nanohybrid can be prepared by Sol-Gel process as the presence of the Y -Methacryloxypropyl trimethoxysilane monomer unit.Poly (styrene)-b-Poly (N-vinylpyrrolidone) and Poly (Styrene)-b-Poly (2-Hydroxyethyl acrylate) with significantly low polydispersities(l.1-1.2) were synthesized under the control of HTEMPO. Block copolymer can be self-assemblied into nanoscalled micella in polar and nonpolar solvents. Star polymers were formed after core cross-linking of these block copolymers by diisocyanate. Molecular weight of the star polymers is about 500 thousand ,even 1 million, and its PDI( per disperse index) is approximately 1.5.These polymers were analyzed with FT-IR, GPC and NMP. The micro morphology of star polymers were studied from their TEM pictures.