Investigation of the Performance of Barrel Atmospheric Plasma Source for the Deposition of Fluorocarbon Coating onto Silicone Polymer Particles

This study reports on the use of a barrel atmospheric plasma source for the deposition of a fluorocarbon coating onto the silicone polymer particles. The (Perfluoro-1-Decene) precursor was introduced into helium plasma and coatings deposited at flow rates in the range 5 to 9 μl/min. The retention of the chemical functionality of the precursor in the plasma polymerized coating was demonstrated using both XPS and FTIR analysis. This study thus demonstrates the success of the barrel reactor for the coating of polymer particles.

Ultrasonic Devulcanization Reactors for Recycling of GRT: Comparative Study

The present paper describes the comparative study of a continuous ultrasonic devulcanization of ground tire rubber (GRT) using two reactors. The devulcanization zone in the first reactor (coaxial reactor) is located at the exit from an extruder without imposition of additional shearing. In the second reactor (barrel reactor), the devulcanization zone is located in barrel where additional shearing takes place due to screw rotation. Gel fraction, crosslink density, cure behavior and physical properties of GRT obtained in these two reactors were measured. Also, the distribution of gel fraction and crosslink density at various locations in the devulcanization zone of the barrel reactor were determined. Gel fraction and crosslink density show that GRT in both reactors is partially devulcanized. A unique correlation between gel fraction and crosslink density obtained in both reactors indicated that additional shearing had a positive influence on improving the efficiency of devulcanization. Under the optimal devulcanization condition, the physical properties of revulcanized GRT and the output are higher in the barrel reactor. Power consumption density in the barrel reactor is found to be significantly higher.

Towards the Optimization of AMT Barrel Reactors for Silicon Epitaxy

ABSTRACTIn this work, the epitaxial silicon deposition by SiHCl3-hydrogen mixtures in a AMT 7700 barrel reactor was analyzed through a detailed model where a three dimensional flow dynamic was solved by reduction to a two dimensional geometry under cylindrical coordinates. The model was used to investigate the role of the reactor geometry and of the process parameters on the axial deposition uniformity. A comparison with industrial experimental data was also performed.