Determination of methylene bridge crosslinking in chloromethylated PS‐DVB resins |
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| Authors: | G Leslie Burnett John C Rohanna Steve Rosenberg Alfred K Schultz Javier Read de Alaniz |
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| Institution: | 1. Materials Research Laboratory, University of California, Santa Barbara, California;2. The Dow Chemical Company, Collegeville, Pennsylvania;3. The Dow Chemical Company, Edina, Minnesota;4. Department of Chemistry and Biochemistry, University of California, Santa Barbara, California |
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| Abstract: | We present the development of a method for the determination of methylene bridge crosslinking in 13C‐labeled chloromethylated polystyrene‐divinylbenzene resins. Our system uses a new room temperature reduction of the chloromethyl groups that circumvents the possible challenges associated with additional crosslinking. We demonstrate how the reduction of the chloromethyl groups allowed for the determination of methylene bridging, derived from the methylenebis(ethenylbenzene) crosslinker, based on the integration of the methylene signal in the 13C NMR spectra. Utilizing this method, the total crosslinking within the chloromethylated resin generated at 35 °C was determined to be upward of 10 wt %, which increased from 6 wt % in the unfunctionalized resin. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016 , 54, 1955–1960 |
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| Keywords: | chloromethylated polystyrene– divinylbenzene crosslinking methylene bridge NMR resins |
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