Publications

Detailed Information

Interfacial Roughening Induced by the Reaction of End-Functionalized Polymers at a PS/P2VP Interface: Quantitative Analysis by DSIMS

Cited 50 time in Web of Science Cited 53 time in Scopus
Authors

Kim, Bumjoon J.; Kang, Huiman; Char, Kookheon; Katsov, Kirill; Fredrickson, Glenn H.; Kramer, Edward J.

Issue Date
2005-06-11
Publisher
American Chemical Society
Citation
Macromolecules, 2005, 38, 6106
Abstract
The reaction of end-functionalized polymer chains at the melt interface between the immiscible polymers, polystyrene (PS) and poly(2-vinylpyridine) (P2VP), has been investigated experimentally. Diblock copolymers were formed at the interface by the reaction of amine end-functionalized deuterated PS with anhydride end-functionalized P2VP. The normalized interfacial excess (ξ = z*PS/Rg,PS) of the deuterium-labeled block copolymer was determined using dynamic secondary ion mass spectrometry (DSIMS). As ξ increases, the interfacial tension decreases to zero, at which point the interface becomes unstable, inducing interfacial roughening by hydrodynamic flow of the homopolymers. Roughening was detected using scanning force microscopy (SFM) after removing the polystyrene with a selective solvent. Evidence of the interfacial instability was also observed by cross-sectional transmission electron microscopy (TEM). The length scale of the corrugation was around 15 nm, which was comparable to the diameter of diblock copolymer emulsified droplets found near the interface. For a short symmetric block copolymer (PS (4K)−P2VP (4K)), we observed that the interfacial roughening takes place above ξ = 0.9, in good agreement with the predictions of self-consistent mean-field theory.
ISSN
0024-9297 (print)
1520-5835 (online)
Language
English
URI
https://hdl.handle.net/10371/5734
DOI
https://doi.org/10.1021/ma047378s
Files in This Item:
There are no files associated with this item.
Appears in Collections:

Altmetrics

Item View & Download Count

  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Share