Facile one‐pot synthesis of linear and radial block copolymers of styrene and isoprene through a novel coupling agent by living anionic polymerization |
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| Authors: | Santosh Kumar Priyank N. Shah Beom‐Goo Kang Joon‐Keun Min Woon Sung Hwang Ik Kyung Sung Shailesh R. Shah Chivukula N. Murthy Seonyoung Ahn Taihyun Chang Jae‐Suk Lee |
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| Affiliation: | 1. Department of Materials Science and Engineering and Department of Nanobio Materials and Electronics, Gwangju Institute of Science and Technology (GIST), 1 Oryong‐dong, Buk‐gu, Gwangju 500‐712, Korea;2. Applied Chemistry Department, Faculty of Technology & Engineering, The M.S. University of Baroda, Vadodara 390 002, India;3. Kumar and Shah contributed equally to the manuscript.;4. R&D Center, Kolon Industries, Inc., Chemical Organization, 294 Gajwa‐dong, Seo‐gu, Incheon‐si 404‐815, Korea;5. Department of Chemistry, Faculty of Science, The M.S. University of Baroda, Vadodara 390 002, India;6. Department of Chemistry and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang 790‐784, Korea |
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| Abstract: | A new methodology is successfully used for the concurrent synthesis of three different copolymers; diblock, triblock, and three‐armed star‐block copolymers of styrene and isoprene via the living anionic polymerization with control over the molecular weight and weight fractions of each block. The room temperature polymerization process has resulted in the well defined linear and radial block copolymers, when the living di‐block of poly(styrene‐b‐isoprene) was coupled using cheap and readily available malonyl chloride as a novel coupling agent giving nearly 100% yield. The resulting block copolymers have narrow polydispersity index (PDI = 1.01–1.09) with a good agreement between the calculated and the observed molecular weights. The results are further supported by fractionation of the block copolymers by reversed‐phase temperature gradient interaction chromatography (RP‐TGIC) technique followed by size exclusion chromatography (SEC). © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 2636–2641, 2010 |
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| Keywords: | anionic polymerization block copolymers fractionation of polymers reversed phase temperature gradient interaction chromatography (RP‐TGIC) room temperature star polymers |
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