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