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Polymers 2018, 10(5), 467; https://doi.org/10.3390/polym10050467

Thermal Study of Polyols for the Technological Application as Plasticizers in Food Industry

1
Doctorate Institutional in Engineering and Materials Science (DICIM), Sierra Leona 530, Lomas, 2nd Section, C.P. 78210 San Luis Potosí, Mexico
2
Advanced Materials Research Center (CIMAV), Alianza Norte 202, Research and Technological Innovation Park (PIIT), C.P. 66600 Apodaca, Mexico
3
Advanced Materials Research Center (CIMAV), Miguel de Cervantes # 120, Complejo Industrial Chihuahua, C.P. 31136 Chihuahua, Mexico
4
Materials Research Center (DIP-CUCEI), Universidad de Guadalajara, Av. Revolución # 1500, Col. Olímpica, C.P. 44430 Guadalajara, Mexico
5
Faculty of Chemistry Sciences, Autonomous University of San Luis Potosí, Manuel Nava 6, C.P. 78290 San Luis Potosí, Mexico
6
Academic Coordination, Altiplano Region, Autonomous University of San Luis Potosí, Road Cedral km. 5+600, C.P. 78700 Matehuala, Mexico
*
Author to whom correspondence should be addressed.
Received: 12 April 2018 / Revised: 23 April 2018 / Accepted: 23 April 2018 / Published: 25 April 2018
(This article belongs to the Special Issue Thermal Properties and Applications of Polymers)
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Abstract

In this work is presented the complete thermal analysis of polyols by direct methods such as simultaneous thermogravimetric and differential thermal analyzer (TGA-DTA), differential scanning calorimetry (DSC), modulated DSC (MDSC), and supercooling MDSC. The different thermal events in the temperature range of 113–553 K were identified for glycerol (GL), ethylene glycol (EG), and propylene glycol (PG). Boiling temperature (TB) decreased as GL > EG > PG, but increased with the heating rate. GL showed a complex thermal event at 191–199 K, identified as the glass transition temperature (Tg) and devitrification temperature (Tdv), and a liquid–liquid transition (TL-L) at 215–221 K was identified as the supercooling temperature. EG showed several thermal events such as Tg and Tdv at 154 K, crystallization temperature (Tc) at 175 K, and melting temperature (Tm) at 255 K. PG also showed a complex thermal event (Tg and Tdv) at 167 K, a second devitrification at 193 K, and TL-L at 245 K. For PG, crystallization was not observed, indicating that, during the cooling, the liquid remained as an amorphous solid. View Full-Text
Keywords: polyols; thermal properties; glass transition temperature; devitrification temperature; modulated differential scanning calorimetry (MDSC) polyols; thermal properties; glass transition temperature; devitrification temperature; modulated differential scanning calorimetry (MDSC)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Toxqui-Terán, A.; Leyva-Porras, C.; Ruíz-Cabrera, M.Á.; Cruz-Alcantar, P.; Saavedra-Leos, M.Z. Thermal Study of Polyols for the Technological Application as Plasticizers in Food Industry. Polymers 2018, 10, 467.

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