Journal
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Volume 43, Issue 18, Pages 4030-4039Publisher
WILEY
DOI: 10.1002/pola.20890
Keywords
anionic polymerization; block-graft copolymers; light scattering; NMR; size exclusion chromatography; styrenic macromonomers
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The following triblock-comb copolymers of isoprene (I) and styrene (S)PS-b-(PI-g-PI)-b-PS, PS-b-[PI-g-(PI-b-PS)]-b-PS, and (PS-g-PS)-b-(PI-g-PI)-b-(PS-g-PS) (where PS is polystyrene and PI is polyisoprene)-with PS contents of 20-30% were synthesized with high-vacuum techniques and the anionic copolymerization of styrenic-tipped macromonomers with I and S. The macromonomers, prepared by the reaction of living PI or PS with 4-(chlorodimethylsilyl) styrene, were used without isolation. Molecular characterization by size exclusion chromatography, size exclusion chromatography/two-angle laser light scattering, and NMR spectroscopy indicated that the triblock-comb copolymers had high molecular and compositional homogeneity. (c) 2005 Wiley Periodicals, Inc.
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