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Infrared and liquid chromatographic characterization of epoxy cresol novolac‐phenol formaldehyde novolac‐tertiary amine resin systems
Author(s) -
Belton D. J.,
Sullivan E.
Publication year - 1986
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1986.070310516
Subject(s) - epoxy , phenol , formaldehyde , bisphenol a , materials science , amine gas treating , molar mass distribution , phenol formaldehyde resin , infrared , cresol , dyeing , infrared spectroscopy , polymer chemistry , chemistry , organic chemistry , polymer , composite material , physics , optics
The subject of this paper is an infrared and liquid chromatographic characterization of epoxy molding compounds of importance in the microelectronic manufacturing industry. A complete infrared description of resin extracts from 4000 to 700 cm −1 is given for three nondisclosed commercial extracts via comparisons with model epoxy cresol novolac and phenol formaldehyde novolac resins and by observing those spectral alternations affected during cure. In addition, both the molecular weight distributions and the methodology of obtaining such for the resin and hardener components of the extracts are described. These results are based upon reversed phase liquid chromatography and infrared spectroscopic measurements. The analysis described in this paper demonstrates significant differences among materials that, by chromatography alone, appear to have only subtle variations in both the resin and hardener molecular weight distributions. These differences include not only the quantity of resin or hardener of a particular oligomeric molecular weight, but also the apparent resin‐to‐hardener stoichiometry of the combined system.