Kinetic modeling of polypropylene thermal oxidation during its processing by rotational molding
TypeArticles dans des revues avec comité de lecture
The main drawback of rotational molding is a long stay (several dozens of minutes) of polymer in melt state at high temperature in atmospheric air. To prevent any significant polymer thermal degradation, it is necessary to define, preliminary, a processing window in a temperature-molar mass map. The objective of this article is to elaborate and check the validity of a general thermal degradation model devoted to determine, in a near future, some important boundaries of this processing window.This model is composed of two distinct levels: (i) The first level is derived from the thermal transfer mechanisms occurring during a processing operation, polymer phase changes (i.e., melting and crystallization) being simulated by the enthalpy method; and (ii) The second level is derived from the oxidation mechanistic scheme of free additive polymer in melt state established in a previous study, but completed, here, by adding the main stabilization reactions of a common synergistic blend of antioxidants, widely used for rotational molding polymer grades. By juxtaposing such "thermal" and "chemical" levels, it is possible to predict the polymer thermal degradation during a whole processing operation. The validity of both levels is successfully checked in real rotational molding conditions for polypropylene
Fichier(s) constituant cette publication
Cette publication figure dans le(s) laboratoire(s) suivant(s)
Visualiser des documents liés par titre, auteur, créateur et sujet.
COLIN, Xavier; TCHARKHTCHI, Abbas (Nova Science, 2013)This chapter deals with thermal degradation processes occurring during polymer recycling by melt re-processing, i.e. mechanical recycling. Some general aspects of polymer processing are first recalled. Then, thermal ...
Metallocene Polypropylene Crystallization Kinetic During Cooling in Rotational Molding Thermal Condition SARRABI, Salah; BOYER, S.A.E; LACRAMPE, Marie-France; KRAWCZAK, Patricia; TCHARKHTCHI, Abbas (Wiley, 2013)This article is part of an ambitious project. The aim is to simulate mechanical properties of rotomolded part from micro-structure consideration. Main objective here is to consider metallocene polypropylene crystallization ...
GESLIN, Erik; BARTHEYE, Olivier Olivier; SCHMIDT, Colin; TCHA-TOKEY, Katy; KULSUWAN, Teerawat; KEZIZ, Salah; BELOUIN, Tanguy (Canadian Center of Science and Education, 2020)Video games are high emotional vectors. They play with the emotions of players by eliciting and increasing them. The importance of the induction of basic emotions has been a long forestay and is favoured by video game ...
ASGARPOUR, Monir; BAKIR, Farid; KHELLADI, Sofiane; KHAVANDI, Alireza; TCHARKHTCHI, Abbas (WILEY, 2012)During rotational molding, a loosely packed, low-density powder compact transforms into a fully densified polymer part. This transformation is a consequence of particles sintering. Powder compact density evolution of the ...
Experimental study of the miscibility of ABS/PC polymer blends and investigation of the processing effect AID, Sara; EDDHAHAK, Anissa; ORTEGA, Zaida; FROELICH, Daniel; TCHARKHTCHI, Abbas (Wiley, 2017)In the challenging prospect of developing new materials by mixing different polymers to reach a synergetic performance, the present research focuses on the study of the miscibility of two polymers: The acrylonitrile butadiene ...