A: Dried down
film of PVAc latex, cryomicrotomed. No staining.Note the dark gray PVAc
particles surrounded by a lighter phaseof
polyvinylalcohol (PVA).
B: PVAc film
after staining with phosphotungstic acid (PTA). ThePTA stained the phase
which contains PVA. PVA was used in thepolymerization
of the latex.
Composite Latex PMMA Core/PS Shell
These particles
have been cryomicrotomed and stainedwith
RuO4. Note the stained shell is made up of PS phasesthat
gradually formed the shell. Also, there are cores thatare
not completly covered by the shells.
