The presence of inactive end groups explains the leveling-off of the IV buildup curves and determines the ultimate or limiting IVs of all SSP resins.
Figure 5 illustrates the IV buildup curves for SSP of microbeads (0.30 IV) at 230[degrees]C in a gas-fluidized bed with one (1), five (5), and twenty (20) mixing stages.
Figure 6a shows the IV buildup curves for SSP of microbeads (0.30 IV) at various reaction temperatures in a gas-fluidized bed with five mixing stages.
Figure 7 illustrates the IV buildup curves for SSP of smaller beads (~0.8-1.5 mm in diameter, 0.57 IV) at various reaction temperatures (210[degrees]C, 218[degrees]C, and 226[degrees]C) in a gas-fluidized bed with five mixing stages.
Steady-state IV buildup curves for continuous SSP of smaller beads (0.57 IV.
Steady-state IV buildup curves for continuous SSP of micro-beads (0.30 IV) at 230[degrees]C in a gas-fluidized bed with different mixing stages (1.5, or 20).