Abstract
AbstractHydroxytelechelic polybutadiene (HTPB) Arco‐R45M® obtained by free‐radical‐initiated polymerization of butadiene was fractionated by preparative gel permeation chromatography (GPC) using styragel and silicagel as column material. The fractions separated were extensively studied by vapour pressure osmometry (VPO), GPC, and 1H NMR. Commercially available non‐hydroxylated polystyrene and polybutadiene standards cannot be utilized for the proper direct determination of the molecular weight of HTPB by means of GPC. Both high and low hydroxyl functionalities were found for high‐ and low‐molecular‐weight HTPB. The analytical results are discussed in terms of the polymerization mechanism.
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