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 17 Year 2022 Formulation F32.01 : During the dehydration of the PVC loaded with 32.01 % of the shell powder in the vicinity of 103 °C, the free water equivalent to 1.176 % of its initial mass evaporates. The further rise in temperature causes the dehydrochlorination of the PVC which starts at 231 °C and ends at 335 °C losing 51.89 % of its initial mass before condensing. At the end of condensation at 397°C, it loses 6.979% of its initial mass and fragmentation begins and ends at 657.71°C leaving residual cullet of 6.979% of its initial mass: this is the ash that remains in the crucible. See figure 15. Figure 15: distribution of the mass decrease of F32.01. Formulation F51.02 : During the dehydration of the unloaded PVC processed at 107.56°C, we record that it loses 3.278% of its initial mass: this is the free water that evaporates. The further rise in temperature causes the dehydrochlorination of the PVC which begins at 227.56 °C and ends at 314.56 °C losing 48.546 % of its initial mass before condensing. At the end of the condensation towards 372.56 °C, it loses 5.517 % of its initial mass then enters the fragmentation whose totality is reached towards 594.56 °C leaving residual cullet of73154 % of its initial mass as ash in the crucible. See figure 16. Figure 16 : distribution of the mass decrease of F51.02 d) Development of mathematical models for the calculation of thermal parameters of the tubes according to the dosage with shell powder i. Figure17: Influence of shell powder on phase change temperatures of elaborated PVC ©2022 Global Journals 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 Mathematical models for the calculation of thermodiférential parameters (DSC) of tubes