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Citation:
Feng Ke, Zeng Zhao-Hua, Li Zhuo-Mei. Study on Sulfonated EPDM Ionomers Containing Various Ions[J]. Acta Physico-Chimica Sinica,
;1992, 8(03): 370-375.
doi:
10.3866/PKU.WHXB19920316
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Sulfonated EPDM ionomers containing Na~+, Mg~(2+), Zn~(2+) and Al~(3+) have been synthesized and identified with IR spectra. Dynamic mechanical analyses showed that the ionic groups in ionomers have been aggregated to mutiplets instead of clusters. Ther-mogravimetry showed that the thermal stability of the ionomers is in an order as Na>Zn>Mg>Al.
Viscometric behaviors of ionomers in xylene-5% hexanol mixed solvent are quite different from that of EPDM owing to the interaction between ionic groups. The strength of interaction of metallic ions with -SO_3~- is in the order Na>Mg>Zn. This fact was interpreted by considering the different hexanol-solvation ability of different metallic ions and the stability of the solvation layer around them. -
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