Hydrophilic graft modification of a commercial crystalline polyolefin |
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Authors: | Jihoon Shin Andrew Y Chang Lacie V Brownell Ira O Racoma Coreen H Ozawa Ho‐Yong Chung Shufu Peng Chulsung Bae |
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Institution: | 1. Department of Chemistry, University of Nevada Las Vegas, Las Vegas, Nevada 89154‐4003;2. Department of Physics and Astronomy, University of Nevada Las Vegas, Las Vegas, Nevada 89154‐4003 |
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Abstract: | Hydroxy‐functionalized isotactic poly(1‐butene) was synthesized using transition metal‐catalyzed regioselective C? H borylation at the side chain of the commercial polyolefin and subsequent oxidation of the boronic ester functionality. Functionalization up to ~ 19 mol % of the termini of the ethyl side chain occurred without significant side reactions that could alter the polymer chain length. Esterification of the hydroxy group in the polymer with 2‐bromoisobutyl bromide generated a side chain‐functionalized polyolefin macroinitiator. Atom transfer radical polymerization of tert‐butyl acrylate from the macroinitiator produced a high molecular‐weight graft copolymer of the polyolefin, isotactic poly(1‐butene)‐graft‐poly(tert‐butyl acrylate) (PB‐g‐PtBA). Finally, the hydrolysis of the tert‐butoxy ester group of PB‐g‐PtBA created an amphiphilic polyolefin, isotactic poly(1‐butene)‐graft‐poly(acrylic acid), which contained a short carboxylic acid‐functionalized polymer block at the side chain. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 3533–3545, 2008 |
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Keywords: | atom transfer radical polymerization functionalization of polymers graft copolymers macromonomers polyolefins |
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