abstract |
This invention relates to high porosity (≥15%) and/or low pore diameter (PD < 165 μm) propylene polymers and propylene polymerization processes using single site catalyst systems with supports having high surface area (SA ≥ 400 m2/g), low pore volume (PV ≤ 2 mL/g), a specific mean pore diameter range (PD = 1 - 20 nm), and high average particle size (PS ≥ 30 μm). |