Perfluoro-poly(ethers) with hydroxyl end groups: analysis by TOF-SIMS
Article Abstract:
Perfluoro-poly(ethers)(PFPEs) have extensive industrial and commercial applications. Time-of-flight, secondary ion-mass spectrometric studies were conducted to examine the ionic spectra of PFPE with hydroxyl end groups. They are commercially known as Fomblin Z, Krytox-OH and Demnum-SA. An anomaly was identified in the negative-ion spectrum due to the absence of some fragments of the hydroxyl end groups. The findings suggest that the charge-transfer between the electron donating PFPE-OH and electron-accepting dangling bonds influenced the bonding of PFPE-OH to COC.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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Laser ablation of polyethersulfone films: the decomposition of the chain structure and the expansion of neutral species studied by laser ionization mass spectrometry
Article Abstract:
Ablation of polyethersulfone (PES) films at 266 nm has been studied by using laser ionization time-of-flight (TOF) mass spectrometry. PES is made up of two phenylene groups, a sulfone group and an ether oxygen with carbon-carbon bonds within the phenylene rings. Neutral products arriving at an ion extraction position of a TOF mass spectrometer were detected by delaying a post-ionization laser pulse. Results indicate that the decomposition of PES occurs due to the scission of the chain itself and the cleavage of some of the phenylene rings.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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Pulsed laser ablation of Sn and SnO2 targets: Neutral composition, energetics, and wavelength dependence
Article Abstract:
Neutral gas-phase species were examined using time-of-flight mass spectrometric experiments.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2000
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