RESORCINOL FORMALDEHYDE FOAM SHELL TARGETS FOR ICF/

Resorcinol/formaldehyde (RIF) low-density foam making processes have b een adapted to microencapsulation techniques. This has been done in an effort to make low density, low Z, transparent foam shells for use as cryogenic ICF targets. It was necessary to modify the normal R/F form ulation and processing to accelerate the gelation time from tens of ho urs to less than one hour. Proper selection of the inner and outer oil phase solvents was critical for density matching and prevention of th e dehydration of the gelling preform, respectively.