Preparation And Characterization Of Porous Organic Polymers Based On Bisphenol A And Glycoluril

Compared with the traditional inorganic porous materials such as activated carbon, zeolite and porous silicon, porous organic polymers (POPs) stand out for the properties to combine the advantages of both polymers and porous materials. First of all, POPs can be fabricated via various routes. Large amount of organic molecules with different functional groups can be designed and synthesized and used to prepare polymers through a wide variety of synthetic methods. Meanwhile, different functional groups are merged into the skeleton of the materials or at the surface of the pores, making the prepared polymers posses other characteristics. Secondly, POPs can be easily processed. They are flexible to be made into either monoliths or thin films and they can even be dissolved in solvents and then treated using solvent-based techniques without any damage to the porosity. Last but not least, POPs are generally constituted of light elements such as C, H, O, N, B and so on, which is conducive to the further applications because of low density. Given the advantages of POPs mentioned above, organic polymers made from Bisphenol A (BPA) and glycoluril are prepared and characterized in this dissertation. Furthermore, researches have been carried out for the purpose of the porous properties and gas adsorption capacity of the obtained polymers.First, both dialdehyde and trialdehyde compounds are synthesized by Suzuki coupling reaction of aromatic halides with formylphenylboronic acid, and the cheap BPA is selected as a raw material. The preparation of BPA based porous organic polymers (APOPs) is accomplished through the Bakelite type reaction depending on a standard line Schlenk technique at high temperature, using o-dichlorobenzene as solvent and p-toluenesulfonic acid (TsA) as catalyst, respectively. The obtained materials are characterized by NMR, FT-IR, SEM and TGA.Secondly, the preparation of glycoluril based porous organic polymers (GPOPs) is accomplished through the nucleophilic addition reaction of carbonyl group depending on a standard line Schlenk technique at high temperature, using p-toluenesulfonic acid (TsA) as both solvent and catalyst. The obtained materials are characterized by NMR, FT-IR, SEM and TGA.The third, researches are taken to investigate the porosity and gas adsorption capacity of the materials. According to the obtained nitrogen adsorption-desorption isotherms, the highest Brunauer-Emmet-Teller (BET) specific surface area value of APOPs is up to922 m2g’(77K) while the highest Brunauer-Emmet-Teller (BET) specific surface area value of GPOPs is up to1012m2g-1(77K). Gravimetric carbon dioxide adsorption isotherms show that APOPs exhibit a highest carbon dioxide uptake capacity as15.0wt%at1.13bar and273K which is a little larger than that of the GPOPs measured as12.2wt%under the same condition. Gravimetric methane adsorption isotherms show that both APOPs and GPOPs posses a similar highest methane uptake capacity up to4.2wt%at273K and1.13bar.