Related Experiment Video
Updated: Jan 26, 2026

Author Spotlight: Eco-Friendly Extraction of Bioactive Compounds Using Polyol-Based Microwave-Assisted Techniques
Published on: August 23, 2024
Thermal Study of Polyols for the Technological Application as Plasticizers in Food Industry
Alberto Toxqui-Terán1,2, César Leyva-Porras3,4, Miguel Ángel Ruíz-Cabrera5
1Doctorate Institutional in Engineering and Materials Science (DICIM), Sierra Leona 530, Lomas, 2nd Section, C.P. 78210 San Luis Potosí, Mexico. alberto.toxqui@cimav.edu.mx.
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.
Related Concept Videos
Microorganisms in Agriculture and Food industry
Plasticizers
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
Plasticity
Plastic Behavior
Plastic Deformations
Plastic Deformations

