Synthesis and characterization of a polyester based on citric acid/ethylene glycol/glycerol
Por:
Olarte-Paredes, A., Salgado-Delgado, A. M., Garcia-Fuentes, J. J., Salgado-Delgado, R., Cedillo-Valverde, G., Lopez-Lara, T., Hernandez-Zaragoza, J. B., Castano, V. M.
Publicada:
2 dic 2021
Resumen:
The synthesis and characterization of a novel polyester, based on citric
acid and two plasticizers (glycerol -GLY- and ethylene glycol -EG-)
using concentration CA:Plasticizer ratios (1:1, 1:2 and 1:3), is
described. Fourier Transform Infrared Spectroscopy (FTIR) and Nuclear
magnetic resonance (C-NMR) confirmed the functional groups
characteristic of polyester, such as O-H, C-H, C-O, and C = O. Scanning
Electron Microscopy (SEM) showed the morphology changes when mixed with
the plasticizers. Thermogravimetric analysis (TGA) showed that the
degradation began at 525 degrees C for polyester with ethylene glycol,
and at 575 degrees C for polyester with glycerol. The contact angle
measurements showed that the polyester obtained is hydrophilic. The use
of EG or GLY yielded similar contact angle results (average of 65
degrees). Differential scanning calorimetry (DSC) showed that the
crystalline structure of citric acid disappeared due to the
polymerization and the effect of plasticizers on the polymer network.
The original contribution of this work consists in the use of ethylene
glycol as a plasticizer, not reported in the literature, demonstrating
the formation of the polyester with better mechanical properties when
using ethylene glycol as compared to glycerol.
Filiaciones:
Olarte-Paredes, A.:
Inst Tecnol Zacatepec ITZ, Tecnol Nacl Mexico TecNM, Calzada Tecnol 27, Zacatepec De Hidalgo 62780, Morelos, Mexico
Salgado-Delgado, A. M.:
Inst Tecnol Zacatepec ITZ, Tecnol Nacl Mexico TecNM, Calzada Tecnol 27, Zacatepec De Hidalgo 62780, Morelos, Mexico
Garcia-Fuentes, J. J.:
Inst Tecnol Zacatepec ITZ, Tecnol Nacl Mexico TecNM, Calzada Tecnol 27, Zacatepec De Hidalgo 62780, Morelos, Mexico
Salgado-Delgado, R.:
Inst Tecnol Zacatepec ITZ, Tecnol Nacl Mexico TecNM, Calzada Tecnol 27, Zacatepec De Hidalgo 62780, Morelos, Mexico
Cedillo-Valverde, G.:
Inst Invest Mat UNAM, Circuito Exterior Ciudad Univ, Mexico City, DF, Mexico
Lopez-Lara, T.:
Univ Autonoma Queretaro, Fac Ingn, Div Estudios Posgrad, Queretaro, Mexico
Hernandez-Zaragoza, J. B.:
Univ Autonoma Queretaro, Fac Ingn, Div Estudios Posgrad, Queretaro, Mexico
Castano, V. M.:
Univ Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, Campus Juriquilla, Queretaro 04510, Mexico
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