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 21 Year 2022 © 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 are looking for, or to determine the thermal properties of the plastic bubbles we are soliciting when we have the dosage in palm kernel shell powder. Thus, we obtained results that we represented respectively on figures 17, 18 and 19. These results summarized in Tables 1 and 2 have allowed us to present in Table 3 the results of the thermal properties of elaborated PVC tubes loaded with palm kernel shell powder. We have highlighted the results of the properties of the PVC tubes we elaborated (F4.01, F23.03 and F38.02) but which were not analyzed. From the observations, we found a logic in the results of the thermal parameters of all the elaborated tubes. We can say that the elaborated mathematical models are applicable. These results show that all the tubes have been :  Characterized under the same assumptions ;  Elaborated with the same assumptions and under the same working conditions;  Analyzed with the same laws and in the same standards. Thus, the engineer has mathematical models to determine the thermal parameters of plastics loaded with palm kernel shell powder in the company. In the same launches, we propose for the future, that after the validation of this fastidious work, we will lean on the conception and the realization of a computer program having to manage the calculations of the thermal properties of the plastic materials when we will use the powder of shells of palm kernel micronized. At the same time, in the same objectives, we will consider the creation of abacuses allowing to find the thermal characteristic parameters of plastics according to the dosage of palm kernel shell powder. This method of abacuses was formerly used in research [24] especially after the manufacture of machine tools allowing the operators and the workers on machine to determine the parameters of work without each time to resort to calculations, which makes it possible to limit the displacements and to support the industrial productivity. IV. C onclusion The availability of palm kernel shells in the world in general (South-East Asia, Africa), and Cameroon in particular is real. Their use as load for the production of plastic tubes in PVC was the subject of work. The research of the characterization and the tests of the valorization of these tubes remain the concerns related to the success of the shells of palm kernel as the only load for the synthetic polymers. The thermal characterization of the tubes of some formulations was done according to the standard, with a LENSEI apparatus which provided us with TG/DSC thermograms of the tubes for each formulation. The careful analysis of these thermograms and the data from the TG/DSC recordings gave us the results of the thermal parameters of the tubes of each formulation. We plotted the heat absorption curves as a function of the decrease in mass of the loaded PVCs which showed us that the loaded PVCs absorb a considerable amount of heat but gradually before burning out completely. The analysis of these results allowed us to elaborate mathematical models allowing to establish the laws of behavior of all the elaborated tubes and to be able to determine the thermal characteristic parameters of the tubes to be elaborated with a given formulation whatever the dosage of palm kernel shells powder and, Reciprocally, these models also allow to determine the dosage of the tubes by the palm kernel shells powder with precision when the engineer calculated and obtained the thermal parameters of the tubes for his construction. Thus, the knowledge of these technical data represents a favorable asset for the engineers because the risks of supplying the manufacturers without sure data are minimized. Finally, the data obtained during this work leads us to apply the results not only for tubes but also for many other forming methods depending on the construction to be performed by the engineer. V. D eclaration of I nterests The authors declare that they have no financial interests or personal relationships that could influence the work reported in this article. A cknowledgement I cannot thank the General Manager of SOFAMAC who was willing to take the risk of putting a whole production line of PVC tubes at my disposal for an experiment. B ibliographie 1. 2. 3. 4. Augier, Laurent, (2007), Etude de l’élaboration de matériaux composites PVC/bois à partir de déchets de menuiserie: formulation, caractérisation, durabilité et recyclabilité. PhD, Institut National Poly- technique de Toulouse.URL http://ethesis.inp- toulouse.fr/archive/00002291/ Taboni, J. e. , (2009), Composites non tissés avec des fibres naturelles et PP recyclés pour les applications intérieures en automobile. Rapport sur les non tissés à base de matériaux recyclés Holy Nadia Rabetafika, Michel Paquot & Philippe Dubois,(2006), «Les polymères issus du végétal: matériaux à propriétés spécifiques pour des applications ciblées en industrie plastique», BASE [En ligne], volume 10 , numéro 3, 185-196 URL :https://popups.uliege.be/17804507/index.php?id= 1035 . BOUHANK, Salim, (2017), Elaboration de matériaux composites PVC/fibres de Genêt d’Espagne: