Starch esterification with benzoyl chloride was performed in two steps, the first being the alkali treatment of the starch and the second, esterification. Samples of hydrophobic starch benzoate were synthesized with degrees of substitution: 0.73.1.18 and 1.16 and their thermal stability was investigated by non-oxidative, non-isothermal thermogravimetry. It was shown that starch benzoate was thermally less stable than native starch, the thermal stability decreasing with increasing degree of substitution. The results indicated that the scission of CO2 and/or benzoyl groups probably occurred in the temperature region 100-260 degreesC, depending on the dear of substitution. The overall activation energies of thermal degradation were calculated by the Flynn-Wall method.
Ključne reči:
starch benzoate / thermal degradation
Izvor:
Polymer Degradation and Stability, 2005, 87, 1, 177-182
TY - JOUR
AU - Stojanović, Z
AU - Katsikas, Lynne
AU - Popović, Ivanka
AU - Jovanović, S
AU - Jeremić, Katarina B.
PY - 2005
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/851
AB - Starch esterification with benzoyl chloride was performed in two steps, the first being the alkali treatment of the starch and the second, esterification. Samples of hydrophobic starch benzoate were synthesized with degrees of substitution: 0.73.1.18 and 1.16 and their thermal stability was investigated by non-oxidative, non-isothermal thermogravimetry. It was shown that starch benzoate was thermally less stable than native starch, the thermal stability decreasing with increasing degree of substitution. The results indicated that the scission of CO2 and/or benzoyl groups probably occurred in the temperature region 100-260 degreesC, depending on the dear of substitution. The overall activation energies of thermal degradation were calculated by the Flynn-Wall method.
PB - Elsevier Sci Ltd, Oxford
T2 - Polymer Degradation and Stability
T1 - Thermal stability of starch benzoate
EP - 182
IS - 1
SP - 177
VL - 87
DO - 10.1016/j.polymdegradstab.2004.07.018
ER -
@article{
author = "Stojanović, Z and Katsikas, Lynne and Popović, Ivanka and Jovanović, S and Jeremić, Katarina B.",
year = "2005",
abstract = "Starch esterification with benzoyl chloride was performed in two steps, the first being the alkali treatment of the starch and the second, esterification. Samples of hydrophobic starch benzoate were synthesized with degrees of substitution: 0.73.1.18 and 1.16 and their thermal stability was investigated by non-oxidative, non-isothermal thermogravimetry. It was shown that starch benzoate was thermally less stable than native starch, the thermal stability decreasing with increasing degree of substitution. The results indicated that the scission of CO2 and/or benzoyl groups probably occurred in the temperature region 100-260 degreesC, depending on the dear of substitution. The overall activation energies of thermal degradation were calculated by the Flynn-Wall method.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Polymer Degradation and Stability",
title = "Thermal stability of starch benzoate",
pages = "182-177",
number = "1",
volume = "87",
doi = "10.1016/j.polymdegradstab.2004.07.018"
}
Stojanović, Z., Katsikas, L., Popović, I., Jovanović, S.,& Jeremić, K. B.. (2005). Thermal stability of starch benzoate. in Polymer Degradation and Stability
Elsevier Sci Ltd, Oxford., 87(1), 177-182.
https://doi.org/10.1016/j.polymdegradstab.2004.07.018
Stojanović Z, Katsikas L, Popović I, Jovanović S, Jeremić KB. Thermal stability of starch benzoate. in Polymer Degradation and Stability. 2005;87(1):177-182.
doi:10.1016/j.polymdegradstab.2004.07.018 .
Stojanović, Z, Katsikas, Lynne, Popović, Ivanka, Jovanović, S, Jeremić, Katarina B., "Thermal stability of starch benzoate" in Polymer Degradation and Stability, 87, no. 1 (2005):177-182,
https://doi.org/10.1016/j.polymdegradstab.2004.07.018 . .
