Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (5): 954.

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Studies on the Kinetics of Thermal Oxidation of Rosin and Abietic Acid on the Polyethylene Film

QIN Rong-Xiu, HUANG Pin-Xian, LIU Xiong-Min*, MA Li, WU Yan-Ling   

  1. School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
  • Received:2008-09-12 Online:2009-05-10 Published:2009-05-10
  • Contact: LIU Xiong-Min, E-mail: xmliu1@gxu.edu.cn

Abstract:

The kinetics of thermal oxidation of rosin and abietic acid absorbed on the polyethylene film were respectively studied. The kinetic equation of heat oxidation was determined by UV spectrophotometry. The experimental results show that the thermal oxidation reaction of both rosin and abietic acid are pseudo first order reaction. When the reaction temperatures were 303.15, 308.15, 313.15, 318.15, 323.15 and 328.15 K, respectively, the apparent reaction rate constants of abietic acid were 0.0036, 0.0041, 0.0062, 0.0087, 0.011 and 0.0157 min-1, respectively. Its reaction activation energy was 50.29 kJ/mol. when the reaction temperatures were 308.15, 313.15 and 318.15 K, respectively, the apparent reaction rate constants of rosin were 0.0009, 0.0015 and 0.0025 min-1. The reaction activation energy was 80.2 kJ/mol.

Key words: Rosin, Abietic acid, Oxidation reaction, Kinetics, Rate constant

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