The state of ion aggregation in ionomers based on copolymers of styrene and acrylic acid - 1. Small-angle X-ray scattering studies

Small-angle X-ray scattering results for random ionomers based on copolymer s of styrene and acrylic acid containing ions of alkali metals are presente d. A study has been made on the influence of the content and type of acryla te in styrene-based ionomers on the state of ion aggregation. The obtained results indicate that in the case of the ionomers containing caesium ion cl usters of sizes similar to 100 Angstrom and multiplets of sizes similar to 20 Angstrom are formed. For these ionomers, the increase of the temperature causes the increase of the size of clusters. In the case of ionomers containing lithium and potassium ions, only the sma ller aggregate multiplets are formed. (C) 2000 Elsevier Science Ltd. All ri ghts reserved.