High speed separation of ultra-high molecular weight polymers by

Details High speed separation of ultra-high molecular weight polymers by High speed separation of ultra-high molecular weight polymers by

1988-07-11

1989-05-16

Sever, Frank

Liquid purification or separation

Processes

Including controlling process in response to a sensed condition

210748, 210775, 210789, B03B 500

Patent

active

048307564

ABSTRACT:
A process for high speed separation of ultra-high molecular weight polymers using a hyperlayer field-flow fractionation technique comprising forcing a carrier fluid containing a small sample of the high molecular weight polymer through a thin flow channel possessing an accumulation wall, applying a primary externally controlled driving force transversely across the thin dimension of the channel, adjusting the flowrate of the fluid and the field strength of the primary externally controlled force in relationship to the channel thickness such that at least over part of the molecular weight range the entropic force F.sub.e and the primary driving force F.sub.1 are related by the inequality .vertline.F.sub.e .vertline.>.vertline.F.sub.1 .vertline. at the accumulation wall of the channel.

REFERENCES:
patent: 3449938 (1969-06-01), Giddings
patent: 4147621 (1979-04-01), Giddings
patent: 4214981 (1980-06-01), Giddings
patent: 4440638 (1984-04-01), Judy et al.

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