Salt effect on gel permeation chromatography of partially charged polymers

Salt effect on gel permeation chromatography of partially charged polymers

The effect of the addition of 0.1M LiBr to dimethylformamide (DMF) solutions of charged and uncharged polymers has been studied by GPC and [η] measurements. LiBr has a salting‐out effect on polyacrylonitrile (with (PAN‐S) and without (PAN) sulfonate sulfur), polystyrene (PS), and poly(vinyl acetate)...

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Veröffentlicht in:Journal of applied polymer science 1972-11, Vol.16 (11), p.2829-2834
Hauptverfasser: Coppola, Gerolamo, Fabbri, Piero, Pallesi, Bice, Bianchi, Umberto
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container_end_page 2834
container_issue 11
container_start_page 2829
container_title Journal of applied polymer science
container_volume 16
creator Coppola, Gerolamo
Fabbri, Piero
Pallesi, Bice
Bianchi, Umberto
description The effect of the addition of 0.1M LiBr to dimethylformamide (DMF) solutions of charged and uncharged polymers has been studied by GPC and [η] measurements. LiBr has a salting‐out effect on polyacrylonitrile (with (PAN‐S) and without (PAN) sulfonate sulfur), polystyrene (PS), and poly(vinyl acetate) (PVAc), which is seen by a decrease in [η] and an increase in the GPC retention time. The increase in retention time is, however, abnormally high for charged polymers. Association in PAN and PAN‐S solutions in DMF can explain the experimental observations.
doi_str_mv 10.1002/app.1972.070161109
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title Salt effect on gel permeation chromatography of partially charged polymers
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