Methacrylate-acrylate based polymers of low plasticiser content for potassium ion-selctive membranes

Yook Heng Lee, Elizabeth A H Hall

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

Polymers prepared from of glycidyl methacrylate, methyl methacrylate and n-butyl acrylate were studied for their possible use as a valinomycin-based potassium ion-selective membrane with low or no plasticiser content. Four polymers were observed to be functional as potassium ion-selective membranes in the presence of valinomycin and lipophilic salt. All polymeric membranes gave Nernstian or near-Nernstian responses over the potassium ion concentration range of 10-5-10-1 M. The potassium selectivity over sodium, log Kpot KM, values, for all membranes were in the range -3.0 to -4.1 as measured by the mixed solution method with interfering sodium ion at 0.1 M. Interference of Na+ and other cations was also studied by the separate solution method. Terpolymers prepared from methacrylate-acrylate monomers with a high n-butyl acrylate ratio, required little or no o-NPOE as plasticiser to form functional potassium ion-selective membranes with only a slight decrease in potassium ion selectivity. The monomer n-butyl acrylate appeared to act as a built-in plasticiser to lower the glass transition temperature of the polymers and allowed potassium ion-selective behaviour to occur even in the absence of plasticiser.

Original languageEnglish
Pages (from-to)47-56
Number of pages10
JournalAnalytica Chimica Acta
Volume324
Issue number1
DOIs
Publication statusPublished - 30 Apr 1996
Externally publishedYes

Fingerprint

Plasticizers
Methacrylates
Potassium
Polymers
potassium
polymer
Ions
membrane
Membranes
Ion selective membranes
ion
Valinomycin
Monomers
Sodium
sodium
Polymeric membranes
Terpolymers
Transition Temperature
acrylic acid
Glass

Keywords

  • Anionic sites
  • Methacrylate-acrylate polymers
  • Plasticiser
  • Potassium ion-selective electrodes
  • Valinomycin

ASJC Scopus subject areas

  • Biochemistry
  • Analytical Chemistry
  • Spectroscopy
  • Environmental Chemistry

Cite this

Methacrylate-acrylate based polymers of low plasticiser content for potassium ion-selctive membranes. / Lee, Yook Heng; Hall, Elizabeth A H.

In: Analytica Chimica Acta, Vol. 324, No. 1, 30.04.1996, p. 47-56.

Research output: Contribution to journalArticle

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