## 3 Results and Discussion
### Raman Investigations
In view of the variation of these three rates, we can say that the addition of AMF in the mixture based on CB (we go from 33% by mass to 50% for CB + AMF mixture) was accompanied by a very strong contribution of the mode at 1730 cm\({}^{-1}\), then to a lesser extent of the mode contribution at 1743 cm\({}^{-1}\) and finally to a small extent of the mode at 1735 cm\({}^{-1}\). When CBE is added to the two previous mixtures, the influence of AMF on the variation of the different area ratios is less pronounced than without CBE addition. The ratio \(\tau_{1}\) is multiplied by two between CB + 0.5 AMF + CBE and CB + AMF + CBE mixtures, while for CB + 0.5 AMF and CB + AMF mixtures it is multiplied by four. This can be explained by a lower proportion of mass of AMF in the two new mixtures. Between \"CB + 0.5 AMF\" and \"CB + AMF\" mixtures, we shift from 33% of AMF in the mixture to 50%, while for \"CB + 0.5 AMF + CBE\" and \"CB + AMF + CBE \"mixtures we go from 20% to 33% by mass for AMF. However, in \"CB + 0.5 AMF\" and \"CB + AMF + CBE\" mixtures where the proportion of AMF is the same, the area ratios are different. This means that the contribution of CBE in the mixture is not the same as the contribution of CB. If we compare the variations of \"CB + 0.5 AMF\" mixtures with \"CB + AMF + CBE\" mixtures, we notice that \(\tau_{1}\) has been multiplied by approximately two and \(\tau_{3}\) has been divided by two. CBE therefore has a direct impact on the environment close to the carbonyl group in the whole crystal structure of the mixture due to the fact that some of its TGs are in IV form, while for CB they are all in V or VI form. In the 3000 cm\({}^{-1}\) zone, the previous study of Raman spectra of AMF as a function of temperature highlighted a degree of crystallization marker: the intensity ratio \(r=I[\
u_{s}(CH2)]/I[\
u_{as}(CH2)]=I_{2845}/I_{2880}\)[15]. It was observed that the intensity of the asymmetric valence mode of vibration \(\
u_{as}(CH_{2})\) at 2885 cm\({}^{-1}\) increased with respect to the intensity of the symmetric valence mode of vibration \(\
u_{s}(CH_{2})\) at 2850 cm\({}^{-1}\) as the temperature decreased. On the other hand, [PERSON] et al. demonstrated that this ratio was very sensitive to the conformation of TGs in the crystal structure of cocoa butter [13] between the liquid form of CB and its form VI. This ratio goes from 1.72 to 0.44. Table 6 gives the value of this intensity ratio for the different mixtures at room temperature. \begin{table}
\begin{tabular}{c c} \hline \hline
**Sample** & _r= Area\({}_{2850}/Area_{2885}\)_ \\ \hline CB & 0.42 \\ CBE & 0.68 \\ AMF & 1.10 \\ CB + 0.5 AMF & 0.79 \\ CB + AMF & 0.82 \\ CB + 0.5 AMF + CBE & 0.64 \\ CB + AMF + CBE & 0.80 \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Area ratio of 2850 and 2885 cm\({}^{-1}\) vibrational modes of Raman spectra for CB, CBE, AMF and mixtures at room temperature. From Table 6, it is noted that at room temperature, CBE is less crystallized than CB because part of its TGs is in IV form. It is also noted that the ratio remains practically identical between CB + 0.5 AMF and CB + AMF + CBE mixtures, and the percentage by mass of AMF remains identical. Between CB + 0.5 AMF + CBE and CB + AMF + CBE mixtures, where the percentage by mass of AMF changes from 20% to 33%, we also observe an increase in this rate from 0.64 to 0.80, while for CB and CBE alone the ratio \(r\) is very different. Concerning mixtures between CB, AMF and CBE, it would seem that the proportion of AMF is a determining factor in the increase or not of this report.