TY - THES

T1 - Mathematical Modeling and Optimization of Run Parameters of Crystallization Analysis Fractionation (CRYSTAF)

AU - Fischlschweiger, Michael

N1 - embargoed until null

PY - 2009

Y1 - 2009

N2 - A sample independent statistic mathematical model was developed which describes the quality of separation of polymer blends by Crystallization Analysis Fractionation (CRYSTAF). By coupling the abstract model with experimental data, factors influencing the non-equilibrium CRYSTAF separation process of heterophasic polypropylene copolymers were determined. It could be shown that the stirring speed during CRYSTAF process strongly influences the quality of separation and thus the quality of the CRYSTAF profile obtained for a certain polymer. A new optimal fractionation method for CRYSTAF was designed which leads to CRYSTAF profiles of high quality. The results of the model were experimentally verified by application of the new method to three different polyolefin blends.

AB - A sample independent statistic mathematical model was developed which describes the quality of separation of polymer blends by Crystallization Analysis Fractionation (CRYSTAF). By coupling the abstract model with experimental data, factors influencing the non-equilibrium CRYSTAF separation process of heterophasic polypropylene copolymers were determined. It could be shown that the stirring speed during CRYSTAF process strongly influences the quality of separation and thus the quality of the CRYSTAF profile obtained for a certain polymer. A new optimal fractionation method for CRYSTAF was designed which leads to CRYSTAF profiles of high quality. The results of the model were experimentally verified by application of the new method to three different polyolefin blends.

KW - mathematical modeling

KW - optimization

KW - phase separation

KW - fractionation

KW - CRYSTAF

KW - Mathematische Modellierung

KW - Optimierung

KW - Phasenseparation

KW - Fraktionierung

KW - CRYSTAF

M3 - Master's Thesis

ER -