Journal
COLLOID AND POLYMER SCIENCE
Volume 294, Issue 2, Pages 389-397Publisher
SPRINGER
DOI: 10.1007/s00396-015-3790-6
Keywords
Sulfobetaine copolymer; Salt-in effect; Intrinsic viscosity; Aggregation; Rheology
Categories
Ask authors/readers for more resources
Sulfobetaine 3-[N,N-dimethyl-N-(2-methacryloxylethyl)ammonio]-propane sulfonate (DMAPS) was used to copolymerize with acrylamide (AM) to prepare salt-sensitive copolymers. According to salt-in effects at the same chloride anion investigated using turbidimetric titration method, dissolution of the copolymer is related to cations, following the order of Al3+ > Mg2+ > Ca2+ > Na+ similar to K+ > Li+. It was found that the electrostatic shielding effect rather than the acid-base interaction was the major reason for the salt-in effect. The salt expansion effect, monitored by intrinsic viscosity under given ionic strengths (I), exhibited an efficiency sequence of cations differing from the salt-in effect. Both single molecule and intermolecular aggregation were found in even dilute solution. Expansion of single molecules and aggregates and breakdown and reformation of aggregates by hydrophobic interaction can be seen as I increases. These conformation changes were used to explain the rheological behavior of copolymer in dilute, semi-dilute, and concentrated solutions (or suspensions).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available