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Issue 46, 2017
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Poly(acrylic acid) interpolymer complexes

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Interpolymer complex formation of poly(acrylic acid) with other macromolecules can occur via several mechanisms that vary depending on the pH. At low pH the protonated acid functional group can form bonds with both donor and acceptor moieties, resulting in desolvated structures consisting of two polymers. Complexes were formed in dilute solutions of PAA, functionalised with acenaphthylene, with a range of other polymers including: poly(NIPAM); poly(ethylene oxide) (PEO); poly(dimethylacrylamide) (PDMA); poly(diethyl acrylamide) (PDEAM) poly(vinyl alcohol) (PVA) and poly(vinyl pyrolidinone) (PVP). Fluorescence anisotropy was used to demonstrate complex formation in each case by monitoring the reductions in segmental motion of the chain as the complexes formed. Considerations of the molecular structures of the complexing moieties suggest that solvation energies and pKas play an important role in complex formation.

Graphical abstract: Poly(acrylic acid) interpolymer complexes

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The article was received on 05 Sep 2017, accepted on 03 Nov 2017 and first published on 03 Nov 2017

Article type: Paper
DOI: 10.1039/C7SM01787A
Soft Matter, 2017,13, 8736-8744

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    Poly(acrylic acid) interpolymer complexes

    T. Swift, C. C. Seaton and S. Rimmer, Soft Matter, 2017, 13, 8736
    DOI: 10.1039/C7SM01787A

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