| 摘要 |
The present invention provides a method of separating a polymer from a solvent comprising introducing a superheated polymer-solvent mixture into an extruder, and isolating a polymer product, said extruder being equipped with at least one vent operated at subatmospheric pressure and at least one vent operated at about atmospheric pressure, said extruder having a screw diameter D, said extruder being operated at a feed rate FR and at a screw speed RPM such that a devolatilization performance ratio (DPR) given by Equation (I) <?in-line-formulae description="In-line Formulae" end="lead"?>DPR=FR/RPM Equation (I)<?in-line-formulae description="In-line Formulae" end="tail"?> is selected from a predetermined set of devolatilization performance ratios which correlate with a target characteristic of the polymer product.
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