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Issue 32, 2018
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The role of electrostatic repulsion in the gelation of poly(vinyl alcohol)/borax aqueous solutions

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Abstract

This study examined linear viscoelasticity (LVE) of semidilute non-entangled poly(vinyl alcohol) (PVA) and borax aqueous solutions: one borax molecule dissociates into two B(OH)3 molecules and two B(OH)4 ions, and the latter can crosslink the PVA chains. Gelation was observed with increasing concentration of borax in the solutions. Analysis of LVE with the reversible gelation model reveals that although the number density of crosslinking ions increases with increasing concentration of borax, the fraction of the crosslinking ions decreases, which is attributed to the intensified electrostatic repulsion when more sites of the PVA chains are occupied by the ionic crosslinkers.

Graphical abstract: The role of electrostatic repulsion in the gelation of poly(vinyl alcohol)/borax aqueous solutions

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Publication details

The article was received on 18 May 2018, accepted on 22 Jul 2018 and first published on 01 Aug 2018


Article type: Paper
DOI: 10.1039/C8SM01019F
Citation: Soft Matter, 2018,14, 6767-6773
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    The role of electrostatic repulsion in the gelation of poly(vinyl alcohol)/borax aqueous solutions

    J. Li, Z. Zhang, X. Cao, Y. Liu and Q. Chen, Soft Matter, 2018, 14, 6767
    DOI: 10.1039/C8SM01019F

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