Degradation of poly(butyl methacrylate) model compounds studied via high-resolution electrospray ionization mass spectrometry

Soeriyadi, A. H., Bennet, F., Whittaker, M. R., Barker, P. J., Barner-Kowollik, C., & Davis, T. P. (2011) Degradation of poly(butyl methacrylate) model compounds studied via high-resolution electrospray ionization mass spectrometry. Journal of Polymer Science, Part A: Polymer Chemistry, 49(4).

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Abstract

This study investigates the degradation behavior of poly(n-butyl methacrylate) (p(nBMA)), poly(tert-butyl methacrylate) (p(tBMA)), and poly(hexafluoro butyl methacrylate) (p(HFBMA)) on a molecular level under extreme environmental conditions. The polymers chosen are readily applicable in the formulation of surface coatings and were degraded under conditions which replicated the harsh Australian climate, in which surface coatings may reach temperatures of up to 95 °C and are exposed to broad-spectrum UV radiation of up to 1 kW m-2. The degradation profiles were mapped with high-resolution electrospray ionization mass spectrometry (ESI-MS) with a LCQ quadrupole ion trap mass analyzer, with the peak assignments confirmed to within 3 ppm using ESI-MS with a LTQ-Orbitrap mass detector. It was found that in all the butyl ester polymers analyzed hereina-regardless of their tertiary side-chain structurea-the loss of the butyl ester group and subsequent formation of acid side groups are a component of the overall degradation pathway of poly(butyl methacrylate)s under these harsh conditions. However, it is also demonstrated that the magnitude of this pathway is intimately linked to the side-chain structure with the propensity for degradation decreasing in the order p(tBMA) > p(nBMA) > p(HFBMA). The degradation mechanisms identified in this study, in combination with the previous end-group degradation studies of poly(methyl methacrylate) and poly(n-butyl acrylate), have allowed a much deeper understanding of the molecular degradation behavior of poly(acrylate)s and poly(methacrylate)s in an extreme natural environment. © 2010 Wiley Periodicals, Inc.

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ID Code: 99283
Item Type: Journal Article
Refereed: Yes
Additional Information: Cited By :10
Export Date: 5 September 2016
CODEN: JPACE
Correspondence Address: Barner-Kowollik, C.; Preparative Macromolecular Chemistry, Institut für Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 18, 76128 Karlsruhe, Germany; email: christopher.barner-kowollik@kit.edu
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Keywords: acrylic polymer, coatings, degradation, electrospray ionization mass spectrometry, mass spectrometry, polymer degradation, Acrylic polymers, Butyl ester, Butyl methacrylates, Degradation behavior, Degradation mechanism, Degradation pathways, Degradation profiles, Degradation study, End groups, Environmental conditions, High resolution, Mass detectors, Model compound, Molecular degradation, Molecular levels, Natural environments, Orbitrap, Poly (butyl methacrylate), Poly(n-butyl acrylate), Poly(n-butyl methacrylate) (Pn-BMA), Polymethacrylates, Quadrupole ion traps, Side chain structure, Side-chain, Surface coatings, UV radiation, Acrylics, Electrospray ionization, Esterification, Esters, Ionization, Isomers, Plastic coatings, Polymers, Ultraviolet radiation
DOI: 10.1002/pola.24492
ISSN: 0887624X
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 22 Sep 2016 04:50
Last Modified: 05 Oct 2016 04:44

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