Poly[ethylene-co-(vinyl alcohol)]-graft-Poly(ε-caprolactone) by Reactive Extrusion, 2 – Parameter Analysis

✍ Scribed by Yanchao Zhao; Frédéric Becquart; Yvan Chalamet; Jianding D. Chen; Mohamed Taha

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 225 KB
• Volume: 294
• Category: Article
• ISSN: 1438-7492
• DOI: 10.1002/mame.200900136

✦ Synopsis

Abstract

EVOH‐g‐PCL were prepared by a solvent‐free reactive extrusion process using a co‐rotating twin screw extruder. Kinetic simulations were made of selected reaction conditions at 185 °C. Changes in the screw rotation rate resulted in evolution of the residence time distribution and slightly changed the monomer conversion. An increase of the [OH]~0~/[Cl]~0~ ratio made the reactive system more viscous and decreased the overall pumping capacities of the extruder. Increase of the mean residence time, combined with a positive kinetic effect of [OH]~0~ increase, leaded to an important increase in conversion. For all the conducted experiments, equivalent distribution dispersions and good agreements between calculated conversion and those measured were obtained. An increase in temperature from 185 to 200 °C resulted in total conversion.

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