ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Silicone-release coatings are used by the pressure-sensitive adhesive industry for labeling applications. Typical release coatings are prepared by the platinum-catalyzed addition reaction of a silicone hydride fluid with a silicone vinyl polymer. Methodology has been developed to determine the network structure of cured release coatings, which involves degradation of the network with trifluoromethane sulfonic acid in excess hexamethyldisiloxane. Gas chromatography-mass spectrometry (GC-MS) and gas chromatography (GC) were employed to identify and quantify residual functionality and cross-links. Residual hydride functionality was also determined by attenuated total reflectance-Fourier transform infrared spectroscopy (ATRFTIR). The observation of network structure by solid-state 29Si-NMR using cross polarization (CP) and magic angle spinning (MAS) is also discussed. The networks underwent a postcure as evidenced by a decrease in residual hydride functionality and an increase in silane content and/or cross-links. © 1993 John Wiley & Sons, Inc.
Additional Material:
11 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1993.070471219
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