The Initial Oxidations of MMA and MAA by Molecular Oxygen

Abstract

Abstract: Methyl methacrylate (MMA) and methylacrylic acid(MAA) can form the contact charge transfer complex(CCT) with O₂,respectively.After O₂ was bubbled,the concentration of hydroperoxide in MMAincreased with the increasing of oxidation time,however,it did not increase in MAA. From the IR,NMRspectra,it showed that the initial oxidation occured on the α-methyl group of MMAand MAAmolecules via MMA-O₂ CCTand MAAO₂ CCT,respectively. In the case of MAA,the hydroperoxide group would further decompose and produce an aldehyde group.

Key words: Methyl methacrylate, Methylacrylic acid, Contact charge transfer complex(CCT), Initial oxidation

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DING Yu-Ping, QIU Kun-Yuan, FENG Xin-De. The Initial Oxidations of MMA and MAA by Molecular Oxygen[J]. Chem. J. Chinese Universities, 1996, 17(12): 1944.

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The Initial Oxidations of MMA and MAA by Molecular Oxygen

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