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Synthesis of star polymers by organized polymerization of macromonomers
Affiliation:1. Department of Chemistry, Faculty of Science, University of Qom, Qom, Iran;2. Department of Chemistry, Payame Noor University, Iran;3. Department of Chemistry, Amirkabir University of Technology, Tehran, Iran;4. Protein Research Center, Shahid Beheshti University, Tehran, Iran;1. Department of Chemistry, Inorganic Section, Jadavpur University, Kolkata 700 032, India;2. Department of Chemistry, Universitat de les Illes Balears, Crta de Valldemossa km 7.7, 07122 Palma de Mallorca Baleares, Spain;3. FachbereichChemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35032 Marburg, Germany;1. Laboratorio de Relaxometría y Técnicas Especiales, Grupo de RMN, Facultad de Matemática, Astronomía, Física y Computación, Universidad Nacional de Córdoba and IFEG-CONICET, Córdoba, Argentina;2. Technische Universität Ilmenau, Institüt für Physik, Fachbereit Technische Physik II: Polymerphysik, Ilmenau, Germany
Abstract:Vinylbenzyl-terminated polyisoprene (PI) macromonomers were synthesized by the coupling reaction of the corresponding living anions with p-chloromethylstyrene. PI stars were prepared by the free-radical crosslinking of PI macromonomers with divinylbenzene (DVB) in n-heptane. No macrogelation was observed during polymerization. The radical copolymerization of PI macromonomer with DVB led to microgelation in micelles formed by PI macromonomers in the selective solvent (organized polymerization). The arm number of star polymers depended strongly on the concentration ratio of DVB to macromonomer ends.
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