Accession Number : ADA311093
Title : Cure Characterization of Bisphenol A Dicyanate by Fluorescence, UV and FTIR Spectroscopy.
Descriptive Note : Technical rept. Jun 95-May 96,
Corporate Author : CONNECTICUT UNIV STORRS INST OF MATERIALS SCIENCE
Personal Author(s) : Xu, Y. E. ; Sung, C. S.
PDF Url : ADA311093
Report Date : 24 JUN 1996
Pagination or Media Count : 4
Abstract : Dicyanate ester resins are a relatively new class of high performance materials in electronic and composite applications. In this work we present fluorescence, UV and FTIR spectroscopic investigation of cure chemistry of bisphenol A dicyanate ester. FTIR in situ monitoring shows cure kinetics is very sensitive to phenolic impurity. Strong fluorescence and phosphorescence signals associated with cure species have been detected. Fluorescence excitation and emission peaks appear at approximately 280nm and 430nm respectively. The peak intensity initially increases and then decreases; at the same time the peak maxima in the spectra undergo a red shift with cure time. The fully cured polymer emits phosphorescence around 480 nm. UV-Vis cure characterization shows that the absorption at 340 nm increase as the reaction proceeds. A series of model compounds are under study to identify the origin of fluorescence and phosphorescence emission and the UV changes.
Descriptors : *INFRARED SPECTROSCOPY, *FLUORESCENCE, *SPECTROSCOPY, *CURING, *CYANATES, *PHENOLS, *FOURIER SPECTROSCOPY, *ULTRAVIOLET SPECTRA, ELECTRONICS, EMISSION, PEAK VALUES, MATERIALS, COMPOSITE MATERIALS, EXCITATION, RED(COLOR), INTENSITY, IMPURITIES, SIGNALS, SHIFTING, ESTERS, PHOSPHORESCENCE.
Subject Categories : Polymer Chemistry
Atomic and Molecular Physics and Spectroscopy
Distribution Statement : APPROVED FOR PUBLIC RELEASE