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Title:   Author  item
                                            Hwang, Hong-Sikitem
                                            Doll, Kenneth

                                                         - *Ken*item
                                            Moser, Jillitem
                                            Vermillion, Karlitem
                                            Liu, Sean
  Submitted to: Meeting Abstract
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 8/8/2013
                                    Publication  Date: 8/12/2013
                                    Citation: Hwang, H., Doll, K.M., Moser, J.K., Vermillion, K., Liu, S.X. 2013. Is it true that polymerization of vegetable oil occurs through Diels-Alder reaction? [abstract]. American Chemical Society.Interpretive Summary:
                                Technical Abstract: Diels-Alder reaction mechanism is known to be one of the major reaction mechanisms to produce dimers and polymers during heating process of vegetable oil.  However, our NMR study showed no evidence for Diels-Alder products.  Soybean oil oxidized at 180 °C for 24 hrs with 1.45 surface area-to-volume ratio showed 36% polymer peak area in GPC, but the DEPT 135 spectrum didn’t show any signals of possible Diels-Alder products.  A fraction was separated from the oxidized soybean oil by column chromatography, which showing 98% polymer peak area in GPC.  But, again, this fraction showed no signals of proposed Diels-Alder products in the DEPT 135 spectrum.  Methyl oleate and triolein without a diene required for the Diels-Alder reaction produced 27% and 63% of total polymers, respectively, under the same condition.  This indicates that the polymers must be produced by reactions other than the Diels-Alder reaction for these oils.  This study shows that the Diels-Alder reaction is not the major reaction to produce polymers during oxidation of soybean oil.


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