Thermal Field-Flow Fractionation of Initially Dilute Polymer Solutions as a Shear Degradation Model. Scaling Model of Macromolecule Degradation at Concentrations Exceeding the Critical Entanglement Value

2000 ◽  
Vol 39 (5-6) ◽  
pp. 583-604 ◽  
Author(s):  
E. V. CHUBAROVA
Keyword(s):  
Thermal Field ◽  
Polymer Solutions ◽  
Field Flow Fractionation ◽  
Degradation Model ◽  
Scaling Model ◽  
Dilute Polymer Solutions ◽  
Shear Degradation ◽  
Flow Fractionation ◽  
Macromolecule Degradation

Micro-Thermal Field-Flow Fractionation

2002 ◽  
Vol 67 (11) ◽  
pp. 1596-1608 ◽  
Author(s):  
Josef Janča
Keyword(s):  
High Performance ◽  
Thermal Field ◽  
Temperature Drop ◽  
Point Of View ◽  
Constant Field ◽  
Field Flow Fractionation ◽  
Operational Mode ◽  
Experimental Conditions ◽  
Standard Size ◽  
Flow Fractionation

The effect of miniaturization of the separation channel on the performance of thermal field-flow fractionation (TFFF) is substantiated theoretically. The experiments carried out under carefully chosen experimental conditions proved the high performance of the separation of polymers within an extended range of molar masses from relatively low up to ultrahigh-molar-mass (UHMM) samples. The new micro-TFFF allows to achieve high resolution when applying constant field force operation, it makes easy the programming of the temperature drop which is an advantageous operational mode from the point of view of the time of analysis, and it extends considerably the range of perfectly controlled temperature of the cold wall due to a substantial decrease in the heat energy flux compared with standard size channels.

Determination of calibration function in thermal field flow fractionation under thermal field programming

2006 ◽  
Vol 29 (8) ◽  
pp. 1088-1101 ◽  
Author(s):  
Luisa Pasti ◽  
Edgar A. Ventosa ◽  
Ines Mingozzi ◽  
Francesco Dondi
Keyword(s):  
Thermal Field ◽  
Field Flow Fractionation ◽  
Calibration Function ◽  
Flow Fractionation
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