isoconversional analysis
Recently Published Documents


TOTAL DOCUMENTS

30
(FIVE YEARS 2)

H-INDEX

13
(FIVE YEARS 0)

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 297
Author(s):  
Natalia V. Bornosuz ◽  
Irina Yu. Gorbunova ◽  
Viktoria V. Petrakova ◽  
Vyacheslav V. Shutov ◽  
Vyacheslav V. Kireev ◽  
...  

The influence of epoxycyclophosphazene modifier on the process of epoxy-amine curing was studied by differential scanning calorimetry (DSC). The study revealed that the curing process of epoxyphosphazene binders with 4′4′diaminodiphenylsulfone (DDS) provides more complete curing of the formulations in comparison with ones applying low molecular-weight polyamide curing agent (L-20). The isothermal kinetics of curing was described by means of model fitting and the isoconversional approach (Friedman method). Accurate n-order approximation was obtained for all systems under study. In particular, the 2-order equation fits well with the main part of curing excluding high degrees of conversion. The process of curing could be distinguished into three zones. The transition from zone 2 to zone 3 correlates with gelation. According to the isoconversional analysis by Friedman method, the diffusion-controlled mechanism is found at final stage of curing.







2017 ◽  
Vol 128 (3) ◽  
pp. 1385-1390 ◽  
Author(s):  
Mohammad Salmani ◽  
Eskandar Keshavarz Alamdari ◽  
Sadegh Firoozi


2016 ◽  
Vol 125 (2) ◽  
pp. 667-672 ◽  
Author(s):  
Abel Pérez ◽  
Joan Pere Lopez-Olmedo ◽  
Jordi Farjas ◽  
Pere Roura


2016 ◽  
Vol 70 (8) ◽  
Author(s):  
Bojan Janković ◽  
Milena Marinović-Cincović ◽  
Marija Janković

AbstractThe thermal and thermo-oxidative processes in Aroniamelanocarpa (black chokeberry) were investigated using combined thermo-analytical (TG-DTA) and spectroscopic (FTIR) experimental techniques. Isoconversional analysis revealed that the process in an inert (argon) atmosphere was probably governed by chlorogenic acid degradation, where autocatalysis (described by the empirical Šesták–Berggren model) might occur due to water already present in the early stages of the process through hydrolysis. Thermal degradation is described by the intrinsic kinetic parameters, where the degradation rate increases proportionally with an increase in the heating rate. Under oxidative conditions, the process was found to be primarily driven by neochlorogenic acid degradation. The thermo-oxidative degradation of



Sign in / Sign up

Export Citation Format

Share Document