Global Journal of Researches in Engineering, J: General Engineering, Volume 22 Issue 1

lobal Journal of Researches in Engineering ( ) Volume XxXII Issue I Version I J G 10 Year 2022 © 2022 Global Journals 20 to 25 mg. The load mass is between 100mg and 125mg; the initial heating temperature depends on the ambient temperature at the time of measurement. The heating rate according to the literature is 10°/min. The computer plots the ATG/DSC thermograms by recording the data. We carry out the analyses in the Laboratories of Physicochemistry of Materials of the Faculty of Sciences of the University of Yaoundé 1-Cameroon. iii. R esults and D iscussions Results of the preparation of the samples The specimens prepared for the thermogravimetric and thermodifferential analyses are powders crushed with a pestle and mortar and then packaged in plastic bags to comply with the standard. b) Results of thermogravimetric and differential analyses of elaborated tubes We elaborated 7 materials and we were given 4 thermograms with the data of the recordings of the curves. The figures 2, 3, 4 and 5 represent the curves of the elaborated tubes obtained from the LENSEI machine. i. Curves obtained from the analysis machine of each tube Figure 2 is the TG/DSC thermogram of PVC tubes unloaded with palm kernel shell powder while Figure 3 is that of F12.54 of PVC tubes loaded with 12.54% of palm kernel shell powder. Then, Figure 4 is the TG/DSC thermogram of F32.01 of the PVC tubes loaded with 12.54% of palm kernel shell powder while Figure 5 is that of F51.01 of the PVC tubes loaded with 51.01% of palm kernel shell powder. We obtain from the 4 curves that all have the same curves representing the curves of PVC in general according to the literature [8, 14, 15]. Figure 2: TG/DSC of F0 Figure 3: TG/DSC of F12.54 Figure 5: TG/DSC of F51,01 Figure 4: TG/DSC of F32,01 Mathematical Models for the Calculation of the Thermal Properties of PVCs as a Function of Dosage with the Load of Palm Kernel Shell Powder from the Results of Experimental Practice a)