The Chemical Modification Of Polyphenylene Sulfide Resin

Polyphenylene sulfide (PPS) resin is a new kind of linear polymer materials,which is rich in benzene. Considering that the characteristic of PPS and the researchof our laboratory, we start to do the functional modification of PPS resin.We haveprepared two kinds of functional ion exchange resins. The traditional methods for thepreparation of ion exchange resins are too complex, which have limited thedevelopment of ion exchange resins in industry. The preparation process used in thisstudy is simple,which make it possible for its mass production in industry.In this paper, a series of novel functional modification ion exchange resins weresynthesized, such as strong acid ion exchange resin (SAPPS) and a strong base ionexchange resin (QAPPS).Both of the two new materials retain good chemical stabilityand thermal stability of the original skeleton of the polyphenylene sulfide resin, andthe modified functional resins have higher exchange capacity.The preparationmethods of the two functional resins are relatively simple, they can be synthesized bytwo steps. QAPPS resin was firstly prepared via chloromethylation of the PPSskeleton and quaternary amination reaction. SAPPS resin was synthesized via Friedel-Crafts alkylation crosslinking reaction and sulfonation by chlorosulfonic acid. Onthis basis,elemental analysis,FT-IR,TG-DTG,chemical titration were used tocharacterize and analyze their physic-chemical structure and properties primarily. Theexchange capacity of QAPPS is2.87mmol g-1；The exchange capacity of SAPPS is1.98mmol g-1. Thermal analysis showed that the two resins had good thermalstability, the functional groups of QAPPS resin began to decompose at216.3℃andthe functional groups of SAPPS resin began to decompose at336.6℃.The study on the adsorption properties for As(V) of QAPPS was initiallycompleted. Effects of acidity and temperature on As(V) adsorption properties ofQAPPS and the corresponding adsorption kinetics and the regeneration performancewere observed. The results showed that adsorption performance for As(V) could beconducted under pH2~12, but the maximum adsorption capacity of the resin was obtained under pH8~9and adsorption was given priority to with monolayeradsorption and adsorption capacity increased with the increase of temperature. It wasfound that the adsorption kinetic model was consistent with the pseudo-second orderkinetic model.The adsorption was a rapid adsorption process, the adsorptive equilibrium couldbe achieved within30min. And QAPPS resin had excellent regeneration performance,after five adsorption-regeneration cycle, which adsorption capacity decreased onlyslightly, and the adsorbed resin was regenerated by1mol L-1HCl,and theregeneration rate retained97%after five cycles.The study on the adsorption properties for aniline of SAPPS resin was observedsimply. The adsorption capacity variation of the SAPPS resin with time wasexamined. Studies have shown that, the adsorption properties for aniline of SAPPSresin was a fast adsorption process, the adsorptive equilibrium could be achievedwithin45min. the equilibrium adsorption capacity was170.4mg g-1. This researchprovides a new approach for the adsorption of aniline solution in industry.