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Mathematical Modeling and Optimization of Run Parameters of Crystallization Analysis Fractionation (CRYSTAF)

โœ Scribed by Michael Fischlschweiger; Nicolai Aust; Eduard R. Oberaigner; Cornelia Kock

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
690 KB
Volume
211
Category
Article
ISSN
1022-1352

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โœฆ Synopsis

Abstract

Blends of a random poly(propylene) copolymer with different types of polyethylene were used to develop a sample independent statistic mathematical model which describes the quality of phase separation of polymer blends obtained by CRYSTAF. By coupling the abstract model with experimental data, process parameters influencing the nonโ€equilibrium CRYSTAF separation process can be determined. It could be shown that the stirring speed applied during the fractionation process strongly influences the resolution of the derived CRYSTAF profile and thus the quality of fractionation. Nonlinear optimization of the models' response function leads to optimized run parameters for the CRYSTAF process which results in CRYSTAF profiles of high resolution and thus to a high quality in fractionation.

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