Probing the brush structure of end-tethered poly(oligo(ethylene glycol) methyl ether methacrylate) chains
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F25%3A00635764" target="_blank" >RIV/61389013:_____/25:00635764 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0032386125005555?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0032386125005555?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.polymer.2025.128569" target="_blank" >10.1016/j.polymer.2025.128569</a>
Alternative languages
Result language
angličtina
Original language name
Probing the brush structure of end-tethered poly(oligo(ethylene glycol) methyl ether methacrylate) chains
Original language description
Polymer coatings of poly(oligo(ethylene glycol) methyl ether methacrylate) (poly(OEGMA)) have been often synthesized utilizing surface-initiated atom transfer radical polymerization (SI-ATRP) from halogen initiating moieties bound on the surface. This heterogeneous nonlinear analogue of polyethylene glycol has been widely used to introduce biocompatibility in various sensing, drug delivery, tissue engineering and microfluidics applications. While the chemical structure of the coating plays an important role in the biofunctionality, the physical conformational state of polymer chains determines the coating's properties. However, the actual state of the poly(OEGMA) polymer chains constituting the coatings has been rarely accessed. In this work, we have synthesized poly(OEGMA) polymer chains at various grafting densities by tuning the surface concentration of initiating groups in the range of 0.1–4.8 Br-atoms/nm2. We thoroughly examined the chemical and physical structure of the poly(OEGMA) chains through various surface-sensitive techniques. To probe the viscoelastic response of the poly(MEOGMA) brushes of various grafting densities, we combined ex- and in-situ acoustic quartz crystal microbalance with dissipation monitoring (QCM-D) and variable angle spectroscopic ellipsometry (VASE) measurements. The detailed analysis in wet state points to similar relaxation times for the swollen poly(OEGMA) chains of various densities, i.e. similar stretched polymer brush chain conformation irrespectively of their density. The concomitant QCM-D-VASE analysis provided insights of the scaling behavior of the end-tethered poly(OEGMA) brushes with an exponent n = 0.54 throughout the whole studied density region, i.e. σ ranging from 0.04 to 0.27 chains/nm2. The attained brush state of the polymer chains was further corroborated by the reduced grafting density parameter. The observed scaling behavior with an exponent specific to polymer brushes in the high-density region is governed by the strong perpendicular swelling of the chains from the tethering substrate, which is further assisted by the bulky MeOEG side chains, which sterically limit the coiling of the main polymer chain.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10404 - Polymer science
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Polymer
ISSN
0032-3861
e-ISSN
1873-2291
Volume of the periodical
332
Issue of the periodical within the volume
16 July
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
128569
UT code for WoS article
001500346100001
EID of the result in the Scopus database
2-s2.0-105005954049