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Relating side chain organization of PNIPAm with its conformation in aqueous methanol
- Source :
- Soft Matter
- Publication Year :
- 2016
-
Abstract
- Combining nuclear magnetic resonance (NMR), dynamic light scattering (DLS), and μs long all-atom simulations with two million particles, we establish a delicate correlation between increased side chain organization of PNIPAm and its collapse in aqueous methanol mixtures. We find that the preferential binding of methanol with PNIPAm side chains, bridging distal monomers along the polymer backbone, results in increased organization. Furthermore, methanol-PNIPAm preferential binding is dominated by hydrogen bonding. Our findings reveal that the collapse of PNIPAm is dominated by enthalpic interactions and that the standard poor solvent (entropic) effects play no major role.
- Subjects :
- chemistry.chemical_classification
Aqueous solution
010304 chemical physics
Hydrogen bond
General Chemistry
Polymer
010402 general chemistry
Condensed Matter Physics
01 natural sciences
0104 chemical sciences
Solvent
chemistry.chemical_compound
Crystallography
Monomer
Dynamic light scattering
chemistry
0103 physical sciences
Polymer chemistry
Side chain
Methanol
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Soft Matter
- Accession number :
- edsair.doi.dedup.....5399143033b82ff48cf4fc56bc3749bc