Upper Critical Solution Temperature (UCST) Behavior of Polystyrene-Based Polyampholytes in Aqueous Solution.

ABSTRACT: Strong polyampholytes comprising cationic vinylbenzyl trimethylammonium chloride (VBTAC) bearing a pendant quaternary ammonium group and anionic sodium p-styrenesulfonate (NaSS) bearing a pendant sulfonate group were prepared via reversible addition-fragmentation chain-transfer polymerization. The resultant polymers are labelled P(VBTAC/NaSS)_n, where n indicates the degree of polymerization (n = 20 or 97). The percentage VBTAC content in P(VBTAC/NaSS)_n is always about 50 mol%, as revealed by ¹H NMR measurements, meaning that P(VBTAC/NaSS)_n is a close to stoichiometrically charge-neutralized polymer. Although P(VBTAC/NaSS)_n cannot dissolve in pure water at room temperature, the addition of NaCl or h

SUBMITTER: Kanta Sharker K 

PROVIDER: S-EPMC6419060 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature