Polyolefin-b-syndiotactic polystyrene (PO-b-sPS) block copolymers (BCP) are anticipated to provide improved high temperature performance in certain applications due to their composition, elastic nature, and elevated melting temperatures. Analytical characterization of PO-b-sPS is very challenging but critical to ensure the synthesized materials are the targeted block copolymers. Analytical capabilities, including high temperature high-performance liquid chromatography (HTLC) and NMR, were developed to characterize PO-b-sPS BCPs. This talk will present the details of HTLC method development for separation and characterization of PO-b-sPS from building blocks. An example shown in Figure 1 indicates the developed HTLC conditions can separate PS related building blocks according to their tacticity, composition, and molecular weight. The developed HTLC method in conjunction with NMR and other analytical techniques were applied for characterization of PO-b-sPS and were demonstrated to be an effective characterization tool to ascertain the presence of targeted block copolymers.

Separation and characterization of polyolefin-b-syndiotactic polystyrene block copolymers by high temperature high-performance liquid chromatography and NMR

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