Influence of different ester side groups in polymers on the vapor phase infiltration with trimethyl aluminum
Mai L, Maniar D, Zysk F, Schobel J, Kühne TD, Loos K, Devi A (2022)
Publication Type: Journal article
Publication year: 2022
Journal
Book Volume: 51
Pages Range: 1384-1394
Journal Issue: 4
DOI: 10.1039/d1dt03753f
Abstract
The vapor phase infiltration (VPI) process of trimethyl aluminum (TMA) into poly(4-acetoxystyrene) (POAcSt), poly(nonyl methacrylate) (PNMA) and poly(tert-butyl methacrylate) (PtBMA) is reported. Depth-profiling X-ray photoelectron spectroscopy (XPS) measurements are used for the first time for VPI based hybrid materials to determine the aluminum content over the polymer film thickness. An understanding of the reaction mechanism on the interaction of TMA infiltrating into the different polymers was obtained through infrared (IR) spectroscopy supported by density functional theory (DFT) studies. It is shown that the loading with aluminum is highly dependent on the respective ester side group of the used polymer, which is observed to be the reactive site for TMA during the infiltration. IR spectroscopy hints that the infiltration is incomplete for POAcSt and PNMA, as indicated by the characteristic vibration bands of the aluminum coordination to the carbonyl groups within the polymers. In this context, two different reaction pathways are discussed. One deals with the formation of an acetal, the other is characterized by the release of a leaving group. Both were found to be in direct concurrence dependent on the polymer side group as revealed by DFT calculations of the IR spectra, as well as the reaction energies of two possible reaction paths. From this study, one can infer that the degree of infiltration in a VPI process strongly depends on the polymer side groups, which facilitates the choice of the polymer for targeted applications.
Involved external institutions
Ruhr-Universität Bochum (RUB)
Germany (DE)
University of Groningen / Rijksuniversiteit Groningen
Netherlands (NL)
Universität Paderborn
Germany (DE)
Germany (DE)
University of Groningen / Rijksuniversiteit Groningen
Netherlands (NL)
Universität Paderborn
Germany (DE)
How to cite
APA:
Mai, L., Maniar, D., Zysk, F., Schobel, J., Kühne, T.D., Loos, K., & Devi, A. (2022). Influence of different ester side groups in polymers on the vapor phase infiltration with trimethyl aluminum. Dalton Transactions, 51(4), 1384-1394. https://doi.org/10.1039/d1dt03753f
MLA:
Mai, Lukas, et al. "Influence of different ester side groups in polymers on the vapor phase infiltration with trimethyl aluminum." Dalton Transactions 51.4 (2022): 1384-1394.
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