Two isobaric copolymerizations were conducted at 100 and
15 psi to rule out topology influences of the polar containing polymers
towards VI behavior (Analogs 6 and 8). Unexpectedly, Analog 6
(100 psi) demonstrated a depressed VI value which may be partially
accredited to losses of ethylene pressure (lower molar mass) from an
improperly sealed Parr apparatus. Contrarily, Analog 8 (atm) demon-
strated comparable viscosity values to the varied pressurized (100↓) copolymerization of MU and Et. Finally, a polyoctene (Analog 9) was
prepared, at atmospheric pressure, for comparative purposes. Overall,
viscosity behavior of the base oil was improved with the addition of
BPEs at 2% w/w only when moderate molecular weights (N50 kDa)
were achieved by prescribed reaction conditions.