Highly porous polymeric foam of maleimide-termiated poly(arylene ether sulfone) oligomers via high internal phase emulsions

Abstract

PolyH IPEs are highly porous polym ers w hich can be synthesized through emulsion templating by polymerizing the continuous phase of high internal phase emulsions (HIPEs).Poly(arylene ether sulfone) oligomers w ere synthesized via nucleophilic aromatic substitution reaction of bisphenol A , l-(4-hydroxy-phenyl)-pyrrole-2,5-dione (HPMI), and Bis-(4-chlorophenyl)-sulfone were introduced to copolymerize with divinylbenzene (DVB) to improve CO2 adsorption and the mechanical properties of obtained materials. A maleimide-terminated aryl ether sulfone oligomer(MAPES ) was copolymerized with DVB in the continuous phase by using mixed surfactants system (sorbitan monooleate (SpanSO), cetyltrim ethylammonium brom ide (CTAB), dodecylbenzenesulfonic acid sodium salt (DDBSs)) and peroxide initiator. PolyHIPEs was prepared by two types of mixed surfactants ratios (SPAN80 , DDBSs, and CTAB ; 6.3, 0.4, and 0.3 w t% )(7s) and(SPANSO , DDBSS , and CTAB ; 11.3, 0.4, and 0.3 w t% )(12s). A maleimide terminated aryl ether sulfone oligomer was used 0, 2.5, 5, 10, 20, and 30wt% as a copolymer.The porosities and structures of materials were characterized by SEM and Brunauer-Emmett-Teller (BET) nitrogen gas adsorption. The obtained PolyH IPEs showed an open cell and a secondary pore structure with surface areas of approximately 400m 2/g. CO2 adsorption tests were characterized by pilot gasification unit and the obtained materials showed higher adsorption than neat poly(DVB ) without MAP ES. Compressive modulus test of the materials showed a higher modulus than for poly(DVB ) PolyHIPEs.