Any suitable apparatus which permits intimate mixture of the polymer and core materials, the introduction of the supercritical fluid at a pressure sufficient to maintain its supercritical state, release of pressure from the system, expansion of the preparation and {HEAD ~ separation} of {TAIL ~ the SCF} can be used for this process 
Any suitable apparatus which permits intimate mixture of the polymer and core materials , the introduction of the supercritical fluid at a pressure sufficient to maintain its supercritical state , release of pressure from the system , expansion of the preparation and { HEAD ~ separation } of { TAIL ~ the SCF } can be used for this process
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