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Quizzed article | REF: J2783 V2

Ion Exchange ? Basic Principles

Author: François DE DARDEL

Publication date: November 10, 2015, Review date: September 14, 2020 | Lire en français

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    2. General properties of resins

    2.1 Cross-linking rate and backbone porosity

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    2.1.1 The need for cross-linking

    Increasing the degree of cross-linking (percentage of DVB in the monomer, by mass) results in a harder, less elastic resin. More cross-linked resins are more resistant to oxidizing media, which tend to uncross-link the polymer. However, above 10-12% DVB, the structure becomes too rigid and compact. Activation becomes difficult, as access to the bead core is hampered by the density of the backbone.

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