Synthesis and Kinetic Studies on Dimer Fatty Acid/Polyethylene Glycol Polyester |
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Authors: | Guang-zhu Feng Hai Qu Ying-de Cui He-ping Li Kui Lu |
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Affiliation: | (1) School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, China;(2) School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, China;(3) Zhongkai University of Agriculture and Technology, Guangzhou, China |
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Abstract: | Dimer fatty acid polyethylene glycol polyester, a new kind of non-ionic polymeric surfactant, was synthesized by using dimer
fatty acid and polyethylene glycol (400) as materials in this paper. The optimum reaction conditions of esterification were
as follows: the molar ratio of dimer fatty acid (DFA)/PEG (400) is 1 / 1.20, the preferable catalyst is stannous chloride
and the amount is 0.3% (w/w) of the mass of DFA, reaction temperature is 200°C, reaction time is 6 h. The conversion ratio of polyesterification can
reach 98.11%. A new kinetic model of polyesterification reaction catalyzed with stannous chloride was presented. The Genetic
Algorithms and Runge–Kutta were used to estimate the parameters of the kinetic model. The results of experiments and computer
operations indicated that the reaction order is 0.998 to the carboxyl and 1 order to the hydroxyl. The activation energy obtained
from Arrhenius plot is 97.18 kJ mol−1, and the pre-exponential frequency factor is lnA = 21.39 kg2 mol−2 min−1 at temperature range of 160 ∼ 190°C. |
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Keywords: | polyesterification water-soluble polyester kinetic genetic algorithms dimer acid |
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