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Lipase-catalyzed synthesis and characterization of biodegradable polyester containing l-malic acid unit in solvent system

Authors

  • Dahu Yao,

    1. BIN Fusion Research Team, Fusion Research Team, Department of Polymer and Nano Engineering, Chonbuk National University, Jeonju, Jeonbuk, South Korea
    2. College of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, People's Republic of China
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  • Guangji Li,

    Corresponding author
    1. College of Material Science and Engineering, South China University of Technology, Guangzhou, People's Republic of China
    • College of Material Science and Engineering, South China University of Technology, Guangzhou, People's Republic of China
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  • Tapas Kuila,

    1. College of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, People's Republic of China
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  • Peng Li,

    1. College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao, People's Republic of China
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  • Nam Hoon Kim,

    1. Department of Hydrogen and Fuel Cell Engineering, Chonbuk National University, Jeonju, Jeonbuk, South Korea
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  • Seong-Il Kim,

    1. Department of Technology Education, Daebul University, Jeonnam, Republic of Korea
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  • Joong Hee Lee

    Corresponding author
    1. BIN Fusion Research Team, Fusion Research Team, Department of Polymer and Nano Engineering, Chonbuk National University, Jeonju, Jeonbuk, South Korea
    2. Department of BIN Fusion Technology, Chonbuk National University, Jeonju, Jeonbuk, South Korea
    • BIN Fusion Research Team, Fusion Research Team, Department of Polymer and Nano Engineering, Chonbuk National University, Jeonju, Jeonbuk, South Korea
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Abstract

Lipase-catalyzed direct polycondensation of L-malic acid (L-MA), adipic acid, and 1,8-octanediol in organic media was achieved using Novozym 435 as the biocatalyst. 1H-nuclear magnetic resonance spectroscopy indicated that the selectivity of Novozym 435 was unaffected by changes in the organic media. The molecular weight (Mw) of the copolymers was affected by the L-MA feed ratio in the diacids, hydrophobicity of the solvent, and solubility of the substrates in the solvents. The Mw reached a maximum of 17.4 kDa at 80°C in isooctane at a L-MA feed ratio in the diacids of 40 mol %. The Mw increased from 3.2 to 16.6 kDa when the reaction time was extended from 6 to 48 hr at 70°C, and remained relatively constant with further increases in reaction time from 48 to 72 hr. The hydrophilicity, thermal stability, and crystallizability of the copolymer were also investigated. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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