Citation: Hamada Hamada Abdel-Razik, Zeinhom Mohamed El-Bahy. NANOPOROUS MATERIALS BASED ON SPIROKETAL AND SPIROTHIOKETAL POLYMERS FOR SEPARATING METHANOL-TOLUENE MIXTURE[J]. Chinese Journal of Polymer Science, ;2011, 29(4): 450-455. doi: 10.1007/s10118-011-1056-4 shu

NANOPOROUS MATERIALS BASED ON SPIROKETAL AND SPIROTHIOKETAL POLYMERS FOR SEPARATING METHANOL-TOLUENE MIXTURE

Received Date: 24 May 2010
Revised Date: 8 July 2010

Organic microporous materials based on spiroketal and spirothioketal polymers were synthesized through 1,3-dioxol-forming polymerization reaction between pentaerythritol or pentaerythritol tetrathiol and different types of cyclohexa-1,4-dione derivatives. The structure of the prepared polymers was confirmed by NMR spectroscopy and molecular mass measurements. Nitrogen adsorption/desorption isotherms of the prepared polymers show a large amount of nitrogen adsorbed at low relative pressure indicating microporosity. These polymers have Brunauer Emmitt and Teller (BET) surface areas in the range from 492 (m2 g-1) to 685 (m2 g-1). The prepared polymers were found to be useful for pervaporation separation of methanol-toluenemixture with a separation factor up to 12.5 and fluxes, varying between 6.7 10-3 kg/(m2 h) and 13.4 10-3 kg/(m2 h).
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