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Preparation of Soybean Oil Polymers with High Molecular Weight

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Abstract

The cationic polymerization of soybean oils was initiated by boron trifluoride diethyl etherate in supercritical carbon dioxide medium. The resulting polymers had molecular weight ranging from 21,842 to 118,300 g/mol. Nuclear magnetic resonance spectroscopy and gel permeation chromatography analysis confirmed the polymerization had occurred. Parameters affecting the polymerization were studied, which included initiator amount and reaction time. Results show that the longer reaction time, up to 3 h, favored the higher molecular weight of polymers at conditions of 140 °C and initiator BF3·OEt2 (2.5 g, 0.018 mol). When reaction time was increased further, the molecular weight of polymers stayed the same or slightly decreased. Increased concentration of initiator gave the higher molecular weight of polymers. The high molecular weight polymers were possibly formed through two path ways: polymerization and intermolecular Diels-Alder reaction.

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Acknowledgments

The authors gratefully acknowledge Mr. Daniel Knetzer for help in GPC analysis and Dr. Karl Vermillion for collecting NMR spectra.

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Authors and Affiliations

  1. Food and Industrial Oil Research, USDA/ARS/NCAUR, 1815 N. University Street, Peoria, IL, 61604, USA

    Zengshe Liu & Sevim Z. Erhan

Authors
  1. Zengshe Liu
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  2. Sevim Z. Erhan
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Correspondence to Zengshe Liu.

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Mention of trade names or commercial products in this article is solely for the purpose of providing specific information and does not imply recommendation or endorsement by the US Department of Agriculture.

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Liu, Z., Erhan, S.Z. Preparation of Soybean Oil Polymers with High Molecular Weight. J Polym Environ 18, 243–249 (2010). https://doi.org/10.1007/s10924-010-0179-y

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  • DOI: https://doi.org/10.1007/s10924-010-0179-y

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