Synthesis and characterization of linear tetrablock quarterpolymers of styrene,isoprene, dimethylsiloxane,and 2-vinylpyridine |
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| Authors: | Panagiota G. Fragouli Hermis Iatrou Nikos Hadjichristidis |
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| Affiliation: | Department of Chemistry, University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece |
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| Abstract: | A series of five tetrablock quarterpolymers of styrene, isoprene, dimethylsiloxane, and 2-vinylpyridine with molecular weights varying from 117 × 103 to 177 × 103 and having different compositions were synthesized. The synthesis was based on recent advances in the controlled high-vacuum anionic polymerization of hexamethylcyclotrisiloxane and on the selective linking of poly(dimethylsiloxane)lithium with the chlorosilane group of the heterofunctional linking agent chloromethylphenylethylene dimethylchlorosilane. Combined characterization results by size exclusion chromatography, membrane osmometry, and NMR spectroscopy suggested that the synthesized multiblock multicomponent polymers had a high degree of structural and compositional homogeneity. © 2003 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 514–519, 2004 |
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| Keywords: | anionic polymerization heterofunctional linking agent triblock terpolymers tetrablock quarterpolymers multiblock multicomponent polymers |
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