Poly(acrylic acid) interpolymer complexes

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 pol...

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Bibliographic Details
Published in:Soft matter 2017-11, Vol.13 (46), p.8736-8744
Main Authors: Swift, Thomas, Seaton, Colin C, Rimmer, Stephen
Format: Article
Language:English
Subjects:
Acrylamide
Acrylic acid
Acrylics
Alcohols
Chemical bonds
Complex formation
Dilution
Ethylene oxide
Fluorescence
Functional groups
Macromolecules
pH effects
Polyethylene oxide
Polymers
Solvation
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Summary: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 p K a s play an important role in complex formation. Interpolymer complexation of poly(acrylic acid) with other systems via hydrogen bonding only occurs below a critical pH dependent on solvation effects.
ISSN:1744-683X
1744-6848
DOI:10.1039/c7sm01787a