A Snapshot of Thermo‐Oxidative Degradation Products in Poly(bisphenol A carbonate) by Electrospray Ionization Mass Spectrometry and Matrix‐Assisted Laser Desorption Ionization Time of Flight Mass Spectrometry

Carroccio, Sabrina; Rizzarelli, Paola; Zampino, Daniela

doi:10.1002/macp.201100417

Cited by 7 publications

(2 citation statements)

References 44 publications

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“…For comparison purpose, also an EOC sample functionalized with 4-benzoyloxy-2,2,6,6-tetramethyl piperidine-1-oxyl (EOC- g -(Bz-T)) [ 22 ] was photo-oxidized under the same experimental conditions. The identification of the low molecular weight compounds produced and released during the degradation process is of remarkable importance to understand the possible mechanism accounting for deterioration and/or stabilization of polymer materials [ 45 ]. Therefore, low molecular weight species formed during photo-exposure were extracted with a methanol/acetonitrile mixture and analyzed by electrospray ionization-mass spectroscopy (ESI-MS) in positive ion mode so only positive polarized products were identified.…”

Section: Resultsmentioning

confidence: 99%

Grafting of Hindered Phenol Groups onto Ethylene/α-Olefin Copolymer by Nitroxide Radical Coupling

et al. 2017

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Abstract:The covalent immobilization of hindered phenol groups, with potential antioxidant activity, onto an ethylene/α-olefin (EOC) copolymer was carried out by the nitroxide radical coupling (NRC) reaction performed in the melt with a peroxide and the 3,5-di-tert-butyl-4-hydroxybenzoyl-2,2,6,6-tetramethylpiperidine-1-oxyl radical (BHB-T). Functionalized EOC (EOC-g-(BHB-T)) was exposed to photo-and thermo-oxidation. By comparison with some model compounds bearing the (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) moiety or the hindered phenol unit, it was observed that the grafted BHB-T could effectively help the stabilization of the polymer matrix both under photo-and thermo-oxidation. In addition, the immobilization of BHB-T can effectively increase the service life of the functionalized polymers when polymer films were put in contact with ethanol solution thus simulating a possible application of the modified polymer.

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Section: Resultsmentioning

confidence: 99%

Grafting of Hindered Phenol Groups onto Ethylene/α-Olefin Copolymer by Nitroxide Radical Coupling

et al. 2017

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“…According to literature data, ESI‐MS was used to characterize several (co)polymers . Also, in research on the molecular structures of polyhydroxyalkanoates and their synthetic analogues, ESI‐MS was successfully applied to characterize microbial and synthetic aliphatic (co)polyesters .…”

Section: Resultsmentioning

confidence: 99%

Molecular architecture of novel potentially bioactive (co)oligoesters containing pesticide moieties established by electrospray ionization multistage mass spectrometry

Kwiecień

Bałakier

Jurczak

et al. 2015

Rapid Comm Mass Spectrometry

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Analysis of polycarbonate degradation at melt/FeCr-alloy interfaces as a function of the alloy composition by means of combinatorial thin film chemistry

Theile-Rasche,

Meng,

de los Arcos

et al. 2023

SN Appl. Sci.

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Interfacial reactions at the polycarbonate (PC)/FeCr-alloy interface during melt contact were studied as function of the Fe:Cr ratio within the alloy. Thin Fe/Cr films with lateral composition gradients were deposited by magnetron sputtering; the analysis of the films was done with microscopy and X-ray photoelectron spectroscopy (XPS). The local interfacial polymeric film formation could be therefore directly correlated with the Fe:Cr ratio. The local thickness and structure of the formed polycarbonate residue was analyzed by means of imaging ellipsometry, atomic force microscopy as well as Fourier-transform infrared spectroscopy under grazing incidence and XPS. Moreover, confocal fluorescence microscopy of the PC melt/alloy interface could reveal the formation of minor degradation products in the interphase region. The results show that already an Fe:Cr ratio of 2 : 1 leads to a strong inhibition of the thermal degradation in comparison to the unalloyed iron, and that in general, the enrichment of chromium in the passive film leads to an effective suppression of interfacial PC degradation. The data contributes to improving the mechanistic understanding of the role of iron during this process. Additionally, a critical concentration of chromium in the alloys used for PC processing can be deduced.

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A Snapshot of Thermo‐Oxidative Degradation Products in Poly(bisphenol A carbonate) by Electrospray Ionization Mass Spectrometry and Matrix‐Assisted Laser Desorption Ionization Time of Flight Mass Spectrometry

Cited by 7 publications

References 44 publications

Grafting of Hindered Phenol Groups onto Ethylene/α-Olefin Copolymer by Nitroxide Radical Coupling

Grafting of Hindered Phenol Groups onto Ethylene/α-Olefin Copolymer by Nitroxide Radical Coupling

Molecular architecture of novel potentially bioactive (co)oligoesters containing pesticide moieties established by electrospray ionization multistage mass spectrometry

Analysis of polycarbonate degradation at melt/FeCr-alloy interfaces as a function of the alloy composition by means of combinatorial thin film chemistry

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