Effect of Operating Conditions on Dynamic Crystallization of Ethylene/1-Octene Copolymers

Journal Article

N, Chokputtanawuttilerd, . 2013

• Publication Online URL: Effect of Operating Conditions on Dynamic Crystallization of Ethylene/1-Octene Copolymers
• Magazine \ Newspaper: Macromolecular Chemistry and Physics
• Issue Number: 22
• Volume Number: 214
• Pages: 2591-2601

Publication Abstract

Dynamic crystallization (DC) is a new characterization technique for measuring the chemical composition distribution (CCD) of semicrystalline copolymers. This technique fractionates polymers based on chain crystallizabilities under a constant cooling rate; a solvent is also fed through the column at a constant flow rate during the crystallization to enhance the physical separation of the polymer fractions. In this work, a DC model for ethylene/1-olefin copolymers on the basis of population balance, crystallization kinetics, and axial dispersion is proposed. This model is found to describe the experimental DC profiles of an ethylene/1-octene copolymer at various operation conditions very well.