Degradation of Poly(acrylic acid)s with Phenolic Side-Chains
by Manganese Peroxidase from White Rot Fungi |
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Authors: | Email author" target="_blank">Shinji?ItoEmail author Yasunari?Okada Hirofumi?Hirai Tomoaki?Nishida |
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Institution: | (1) Materials Research Laboratory, Petrochemical Division, Research & Development Center, Idemitsu Kosan Co., Ltd., Anesaki-kaigan 1-1, 299-0193 Ichihara, Chiba, Japan;(2) Department of Forest Resources Science, Faculty of Agriculture, Shizuoka University, Ohya 836, 422-8529 Shizuoka , Japan |
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Abstract: | Poly(acrylic acid)s (PAAs) with various functional groups, such as phenolic hydroxyl, amino, and aldehyde groups, in the side-chains were treated with manganese peroxidase (MnP) prepared from the culture of lignin-degrading white rot fungi. While no change in the Mw of PAA without a functional group was observed after a 24-h MnP treatment, the Mw␣of␣PAA␣with p-aminophenol as side-chains decreased from 90,000 to 59,000, and that with␣o-aminophenol from 70,000 to 26,000. MnP treatment also decreased the Mw of PAA with a p-aminoaniline or aldehyde group. Furthermore, the MnP treatment generated a significant depolymerization of the cross-linked PAA with p-aminophenol from an insoluble polymer to water soluble products. These results suggest that functional groups generating radicals can act as elemental devices and induce degradation of the PAA main chain. |
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Keywords: | Poly(acrylic acid) aminophenol biodegradation manganese peroxidase |
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