Figure 3.

SEC traces with differential refractive index detection of a representative sequential ROMP polymer (BB-E_{45, 20}-b-BB-P_{15, 10}). The macromonomer traces are included for reference. From the multi-angle light scattering detector and a Zimm analysis, the BB-PPO aliquot has a M_w = 11,600 g/mol and Đ = 1.20 and the BB-diblock has a M_w = 55,300 g/mol and Đ = 1.10, both were within error of the targeted molecular weight. The small peak at ~17 minutes in the BB-PPO chromatogram is likely a small molecule impurity in the PPO macromonomer, possibly 18-crown-6 ether, that does not impact the subsequent polymerization