Journal article
Coil-to-Globule Transition of Poly(N-isopropylacrylamide) in Aqueous Solution: Kinetics in Bulk and Nanopores
Macromolecular chemistry and physics, v 215(21), pp 2112-2118
Nov 2014
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Differential scanning calorimetry (DSC) is used to study the kinetics of the coil-to-globule transition in aqueous solutions of poly(N-isopropoylacrylamide) (PNIPAM) prepared in the bulk (3 and 10 wt%) and nanoconfined (10 wt% inside 30 nm silica pores) forms. It is demonstrated that the kinetics can be described in terms of the classical nucleation model. The proposed treatment affords estimating the free-energy barrier and pre-exponential factor of the transition. The application of the nucleation model to the DSC data collected for the three systems studied provides physical insights into the effect of increasing the transition temperature due to dilution and nanoconfinement. Dilution appears to raise the free-energy barrier, whereas nanoconfinement causes a decrease in the pre-exponential factor.
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Details
- Title
- Coil-to-Globule Transition of Poly(N-isopropylacrylamide) in Aqueous Solution: Kinetics in Bulk and Nanopores
- Creators
- Reza Farasat - University of Alabama at BirminghamSergey Vyazovkin - University of Alabama at Birmingham
- Publication Details
- Macromolecular chemistry and physics, v 215(21), pp 2112-2118
- Publisher
- Wiley
- Number of pages
- 7
- Grant note
- CHE 1052828 / National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemistry
- Web of Science ID
- WOS:000344389300009
- Scopus ID
- 2-s2.0-85027945389
- Other Identifier
- 991021229892504721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Polymer Science