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Pyrrolidone Research Paper

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Torlon 4000T-HV, a commercially available polyamide-imide (PAI) (Solvay Advanced Polymers, Alpharetta, GA), whereas all liquid chemicals were of reagent grade with 99% purity and purchased from Sigma–Aldrich (Milwaukee, WI) .N-Methyl-2-pyrrolidone (NMP) (Reagent Plus, 99%, Sigma–Aldrich, Milwaukee, WI), Polyvinylpyrrolidone (PVP; average Mw.1300 K, Sigma- Aldrich), Methanol (ACS grade, VWR) and hexane (ACS Reagent, >98.5%, VWR), TEOS (Sigma–Aldrich, Milwaukee, WI), 3-Aminopropyltrimethoxsilane (APS) was used as agent for grafting Torlon 4000T-HV,zirconia ,titania , and silica-Torlon hollow fibers catalysts (diaminosilane, Gelest, Inc.) . Zirconia, titania, and silica (average particle size 100nm, Sigma–Aldrich). Styrene oxide 99% purity

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