* Adhesive compounding: Rubbers, tackifier resins, fillers, and oils are mixed and devolatilized
in the TSE with a gear pump mated to a rod (or film) die for direct glue-stick profile (or laminate) extrusion.
However, in this case, even though the samples were devolatilized
for a long time, the remaining primary blowing agent was still significant.
The resulting polymer solutions are devolatilized
, the solvents recovered, and the separated polymers extruded into pelletized products.
Even using devolatilized
rubber can reduce shrinkage (ref.
Phoenix's original PET process devolatilized
finely ground (0.25 in.) PET flake and then pelletized it.
The number of nuclei initially in a particle as well as the size of these nuclei will be dependent upon the conditions at which the poly(amic acid) solution was devolatilized
. Figure 11 presents the change in the potential inflation of precursor particles upon the increase of potential nuclei.
Wood containing up to 8% moisture is fed into the twin-screw extruder (at typically 40% to 60%), where, in the first processing step, the water is removed (devolatilized
The interconnection of the two extruders was open to the atmosphere so that the evaporated water and other emissions could be devolatilized
In one successful trial run, the polygel was devolatilized
in a twin-screw compounding extruder and then pelletized.
A short mixing section was placed at the end of the screw to fully homogenize the devolatilized
Samples of resin formulations as in (i) and (ii) were withdrawn at different times from the reactor during the pre-reaction, devolatilized
in a vacuum oven at 60[degrees]C, dissolved in toluene/isopropanol solution and finally titrated using potassium hydroxide.
The vapor is the solvent and unreacted monomer, while the liquid is the devolatilized
polystyrene with residual volatiles.