Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Chong Sook Paik Sung"'
Autor:
Chong Sook Paik Sung, Min Sun Kim
Publikováno v:
Fibers and Polymers. 9:171-175
Water interactions in polycarbonate films have been studied using fluorescence and NIR Fourier transform spectroscopy. During water sorption process, the fluorescence emission spectra showed sensitive changes with the peak at 332 nm red shifted by 18
Publikováno v:
Polymer. 46:9378-9384
Cure reactions of the stoichiometric mixtures of diglycidyl ether of bisphenol A (DGEBA) and two very low molecular weight aliphatic polyether diamines (PED) were studied by using fluorescence and mid- and near-IR spectroscopic techniques. As the cur
Autor:
Chong Sook Paik Sung, Min Sun Kim
Publikováno v:
Fibers and Polymers. 6:127-130
Intrinsic UV reflection and fluorescence behaviors of polycarbonate, polyurethane and poly(ethylene terephthalate) films were investigated in order to characterize the interaction of water in these films. During water sorption process, UV reflection
Publikováno v:
Journal of Applied Polymer Science. 94:2446-2450
A strong fluorescence emission was observed during cure of an unsaturated polyester resin containing about 30% styrene by weight. As the cure proceeded, the emission intensity at 306 nm increased. Model compound studies confirmed that the unsaturated
Publikováno v:
Macromolecules. 36:3166-3173
A near-IR spectroscopic technique for cure characterization of unsaturated polyester resin has been developed, first by using model compound mixtures to identify and quantify various reactions and then by applying these quantification techniques to t
Autor:
Chong Sook Paik Sung, Youzhi Eugene Xu
Publikováno v:
Macromolecules. 35:9044-9048
To develop cure monitoring techniques for bisphenol A dicyanate ester (BPADCY) resin, UV, fluorescence, phosphorescence, and IR spectra were investigated. UV−vis spectra during the cure reaction indicates that the cyclotrimerization of cyanate este
Autor:
Shi-Kwun Wang, Chong Sook Paik Sung
Publikováno v:
Macromolecules. 35:877-882
During the reaction injecting molding process of polyurethane−urea (PUU) based on 4,4‘-methylenebisphenyl diisocyanate (MDI), urethane as well as urea linkages are produced when a highly fluorescent aromatic diamine is used as a chain extender. T
Autor:
Shi-Kwun Wang, Chong Sook Paik Sung
Publikováno v:
Macromolecules. 35:883-888
Fluorescence and IR spectroscopic techniques have been used to characterize cure in polyurea (PUa), polyurethane (PU), and polyurethane−urea (PUU), based on the study of model compounds. Polyurea cured in a nonreactive diluent by reacting liquid MD
Publikováno v:
Macromolecules. 34:4923-4926
Water uptake in diglycidyl ether of butanediol (DGEB) epoxy cured with 4,4‘-diaminodiphenyl sulfone (DDS) was studied using UV reflection spectroscopy. There is a progressive shift to longer wavelength of approximately 13 nm for the DDS reflection
Publikováno v:
Macromolecules. 31:5779-5784
Chemical imidization of polyamic acid based on 1,5-diaminonaphthalene and a dianhydride was studied by UV−visible and FT-IR ATR techniques under various reaction conditions, such as polyamic acid concentration, solvent condition (dry vs humidity-ex