The Synthesis And The Performance Study Of The Functional Poly(Phthalazinone Ether Sulfone Ketone)

From the standpoint of molecular design, under the conditions of mixed solvents( dimethyl sulfoxide(DMSO) and N,N’-dimethylacetamide(DMAC)) and acid scavengers(anhydrous potassium carbonate(K2CO3) and potassium hydroxide(KOH)), three types of high molecular weight poly(arylene ether sulfone) with different molar ratios of carboxyl and phenylene(PAES, PAES-C and PAESK-C) [1] were synthesized by direct polycondensation of dichloro-monomer(4,4’-dichlorodiphenylsulfone(DCDPS) and1-(p-chlorobenzoyl)-3-(p-chlorobenzen esulfonyl) benzene) with bisphenol-monomer(4,4’-bis(4-hydroxyphenyl)-pentanoic acid(DPA)and bisphenol A(BPA)). The main work was carried out as follows:1)Gel permeation chromatography(GPC) was used to determine the molecular weight of the as-prepared three types of poly(arylene ether sulfone) with different molar ratios of carboxyl and phenylene. The micromorphology and structure of polymers were characterized by FT-IR,1H NMR, TGA, DSC, SEM and EDS in order to study the regularity of polymeric performances/structures. The results showed that three polymers all have porous structure,especially well-developed in the polymer PAES-C. The three polymers with amorphousness showed good thermal stability and mechanical properties to applied in the more severe environmental.2) Based on the application of polymers containing carboxyl in fields of metal ion separation. The adsorption capacity of PAES-C and its sodium salt PAES-C-Na on Cu2+was studied under the same conditions. The results of experiments indicated sodium salt of the PAES-C-Na(97%)possessed better adsorption ability than PAES-C(10.6%).3) Static adsorption characteristics of Cu2+by the three kinds of poly(arylene ether sulfone) with different molar ratios of carboxyl and phenylene were investigated. Three polymers all can absorb Cu2+ and the adsorption equilibrium data could be well described by Freundlich isotherms equation. The adsorption kinetics behaviors of Cu2+on polymers were properly fitted with the pseudo-second-order model. Based on the molar ratio of carboxyl andphenylene, PAES-C-Na presented the highest adsorption capacity of Cu2+ compared to PAESK-C-Na and PAES. Therefore, the more high molar ratio of carboxyl and phenylene in polymers, the more stronger adsorption capacity of Cu2+.4) PAES-C-Na with the best adsorption capacity of Cu2+ was selected to further study adsorption properties of other metal ions(Pb2+, Cd2+) from wastewater and investigated the impacts of adsorbent dosage, pH, contact time and initial concentration on the adsorption of metal ions onto PAES-C-Na. The mono-component adsorption capacity of PAES-C-Na for metal ions was found in the order Pb2+> Cd2+> Cu2+. Conversely, the multi-component competitive adsorption capacity followed the order Pb2+ > Cu2+ > Cd2+.5) The regeneration tests indicated that PAES-C-Na still possessed the excellent adsorption capacity. Therefore, PAES-C-Na has the great potential to be applied in fields of separating heavy metals and environmental governance.