| Super absorbent polymer (SAP) is a widely used cross-linked functional polymer material. This paper has studied on normalization of measuring conditions by filtration for SAP firstly. SAP such as polyacrylate sodium, potassium and ammonium were synthesized by inverse suspension polymerization which using cyclohexane as continuous phase and water as dispersed phase. In this polymerization, partially neutralized acrylic acid acts as monomer, potassium peroxydisulfate as initator, N,N'-methylene-bis-acryl amide as cross-liker,and span-80 as stable agent. The relations between water absorbency and the amount of suspending agent, initiator, cross-linker, pH of monomer solution and reaction temperature were studied. The regularity of acrylates polymerizations was summarized which enrich the theory of electrolyte polymerizations.On the basis of comprehension about SAP's salt-tolerant property, the author puts forward pathways and methods to improve SAP's salt-tolerant property, and SAP possessing outstanding salt-tolerant property was synthesized by added the thirdmonomer -acryl amide. SAP absorbing 2700 mL/g deionized water was alsosynthesized.SEM, IR and DTA were used to characterize and analysis the acquired SAPs. According to experiment processes and SEM photographs of the best polymer, pure polyacrylate's emulsiods were destroyed during preparation and lumps caused by self-cohesive action were formed and difficult to break up, which the co-polymers emulsiods from partially neutralized acrylic acid and acryl amide forming into unconsolidated bulkload were undivided.Additionally, basic data of SAP about using conditions and quantities were acquired through a series of indoor and outdoor experiments. Suitable methods and quantity for various situations were brought forward.Antifogging coatings with preferable properties were prepared using SAPs in this thesis, which fills up domestic research deficiency in this field.
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