| Full text | |
| Author(s): |
Gonsalves, Rui Lopes
;
Robustillo, Maria Dolores
;
Pessoa Filho, Pedro de Alcantara
Total Authors: 3
|
| Document type: | Journal article |
| Source: | Thermochimica Acta; v. 714, p. 13-pg., 2022-08-01. |
| Abstract | |
This paper presents a simplified approach to describe the melting endotherm obtained through differential scanning calorimetry. This description considers two main resistances to the heat transfer: the resistance from the heat source to the sample, and the resistance in the liquid layer formed during the melting. The approach was successfully applied to the modeling of melting endotherms of pure fatty esters obtained in the same apparatus using heating rates from 0.5 K???min??? 1 to 2.5 K???min??? 1. The external resistance can be considered constant and independent on the substance at low heating rates, whereas the parameter related to the resistance of the liquid layer may depend on the substance and the heating rate. The proposed two-resistance approach yielded an adequate description of the melting endotherm. (AU) | |
| FAPESP's process: | 18/06136-5 - Multi-user equipment approved in grant 2014/21252-0: modulated differential scanning calorimeter with coupled reflection microscopy from Mettler Toledo |
| Grantee: | Pedro de Alcântara Pessôa Filho |
| Support Opportunities: | Multi-user Equipment Program |