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|Dirk Kuckling, Jingjiang Sun|
|University of Paderborn, Germany|
|ScientificTracks Abstracts: Mod Chem appl|
|Vegetable oils are biorenewable triglycerides of fatty acid extracted from plants. The utilization of vegetable oils as renewable
resource in polymeric material application has attracted significantly increasing attention due to their renewability, low
cost, low toxicity, inherent biodegradability and versatile functionality. The fatty acid composition of different vegetable oils
depends on the plant and growing conditions. However, in the unsaturated structure the first double bond is invariable located
between 8th and 9th carbon, which is independent of the fatty acid type. There are several methods to convert the unsaturated
fatty acid to functionalized monomers. Utilization of ozonation technology for double bound cleavage followed by reductive
or oxidative workup can give A3 monomers with defined structures. In this work, trialcohol, trialdehyde and triacid were
synthesized by employing ozonolysis of castor oil and soybean oil. Using these A3 monomers, a variety of hyperbranched
polymers, such as hyperbranched polyester (HBPE), hyperbranched polycarbonate (HBPC), hyperbranched polyacetal
(HBPA) etc., were successfully prepared by A3+B2 condensation polymerization. The resulting hyperbranched polymers
were characterized by NMR spectroscopy for endgroup analysis, size exclusion chromatography (SEC) for molar masses and
differential scanning calorimetry (DSC) for thermal properties.
Scheme 1 From vegetable plant to A3 monomers for hyperbranched polymer synthesis
 Y. Xia and R. C. Larock, Grenn Chemistry,2010,12, 1893-1909.
 I. Cvetkovic, J. Milic, M. Ionescu and Z. S. Petrovic, Hem. Ind. 2008, 62, 319-328.
Dirk Kuckling has completed his PhD from the CAU Kiel, Germany. He further performed research at TU Dresden, Germany and Stanford University, USA. Since 2008 he is full professor for Organic and Macromolecular Chemistry at the University of Paderborn, Germany. He has published more than 130 papers in reputed journals and has been serving as an editorial board member of repute.
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