2014
DOI: 10.1021/la5026763
|View full text |Cite
|
Sign up to set email alerts
|

Phase Instability and Molecular Kinetics Provoked by Repeated Crossing of the Demixing Transition of PNIPAM Solutions

Abstract: The demixing process of aqueous poly(N-isopropylacrylamide) (PNIPAM) solutions can occur either via a nucleation and growth process or via spinodal decomposition. The ensuing self-assembly, leading to heterogeneous morphologies within the PNIPAM solution, is codetermined by kinetic processes caused by molecular transport. By subjecting PNIPAM solutions to cyclic changes in temperature leading to repeated crossing of the demixing transition, we are able to assess the importance of kinetics as well as of overhea… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
2
1

Citation Types

2
14
0

Year Published

2015
2015
2022
2022

Publication Types

Select...
5
1

Relationship

0
6

Authors

Journals

citations
Cited by 18 publications
(16 citation statements)
references
References 57 publications
2
14
0
Order By: Relevance
“…The Lorentz–Lorenz equation can be used if the specific refractivity r of the material considered is independent of temperature . Literature states that this is valid for oils and fats but not necessarily for other components . While Müller et al .…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…The Lorentz–Lorenz equation can be used if the specific refractivity r of the material considered is independent of temperature . Literature states that this is valid for oils and fats but not necessarily for other components . While Müller et al .…”
Section: Methodsmentioning
confidence: 99%
“…While Müller et al . assumed that the specific refractivity r is not only independent of temperature but also the state of aggregation of the material, Aleksandrova et al . stated that the specific refractivity r is depending on temperature and the state of the aggregation.…”
Section: Methodsmentioning
confidence: 99%
“…3 We have performed a much simpler experiment by rapidly crossing the binodal from the homogeneous to the two-phase region with different quench depths. The measurements were performed such that a spectroscopic cuvette (path length 1 mm) with the homogeneous sample was inserted into a prethermostated water bath.…”
Section: The Journal Of Physical Chemistry Bmentioning
confidence: 99%
“…On the molecular level, the phase separation is accompanied by a coil-to-globule transition and dehydration of the polymer chains. 2 A comprehensive overview of the various demixing scenarios and a compilation of relevant literature can be found in the introductory section of ref 3.…”
Section: Introductionmentioning
confidence: 99%
“…Typical methods applied are pulsed nuclear magnetic resonance (pNMR) to determine the solid fat content, differential scanning calorimetry (DSC) to study the crystallization behavior, and polarized light microscopy (PLM) to identify the basic morphology of the sample. Temperature modulated optical refractometry (TMOR) has been applied to study polymers but has not been evaluated for its applicability to characterize the crystallization of fats and oils . The determination of the refractive index of a homogeneous liquid oil is common practice for the purpose of identification.…”
Section: Introductionmentioning
confidence: 99%