FT-IR Study of the Imidization Process of Photosensitive Polyimide PMDA/ODA

1998 ◽  
Vol 52 (7) ◽  
pp. 985-989 ◽  
Author(s):  
W. S. Li ◽  
Z. X. Shen ◽  
J. Z. Zheng ◽  
S. H. Tang
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
High Temperature ◽  
Film Thickness ◽  
Cure Process ◽  
Cure Reaction ◽  
Ft Ir ◽  
Lower Temperature ◽  
Ir Study

Fourier transform infrared spectroscopy (FT-IR) was used to study the cure reaction process of an ester-type photosensitive polyimide, PMDA/ODA films coated on silicon wafer substrates. In the in situ high-temperature FT-IR study carried out in vacuum, all the characteristic peaks of imide and the crosslinkable group were observed to decrease gradually with an increase in temperature. The completion of the imidization reaction is at ∼270 °C. Our result shows that the ester-type photosensitive polyimide can be cured at a much lower temperature than previously reported. The imide peak δas(C, C > NC) at 588 cm−1 was used to follow the imidization process, and the result agrees well with that obtained by using another imide peak v(C–N–C) at 1378 cm−1. The film shrinks by one third during the cure process, and the temperature dependence of the film thickness shows excellent agreement with the “imidization degree”.

scholarly journals Revealing electrolyte oxidation via carbonate dehydrogenation on Ni-based oxides in Li-ion batteries by in situ Fourier transform infrared spectroscopy

2020 ◽  
Vol 13 (1) ◽  
pp. 183-199 ◽  
Author(s):  
Yirui Zhang ◽  
Yu Katayama ◽  
Ryoichi Tatara ◽  
Livia Giordano ◽  
Yang Yu ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Fourier Transform Infrared ◽  
Li Ion Batteries ◽  
Ft Ir ◽  
Li Ion ◽  
Electrolyte Oxidation

Carbonate oxidation via dehydrogenation on LiNi0.8Co0.1Mn0.1O2 at voltages as low as 3.8 VLi was revealed by in situ FT-IR measurements.

Observations of surface-mediated reduction of Pu(VI) to Pu(IV) on hematite nanoparticles by ATR FT-IR

2015 ◽  
Vol 103 (8) ◽  
Author(s):  
Hilary P. Emerson ◽  
Brian A. Powell
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Attenuated Total Reflectance ◽  
Mineral Surfaces ◽  
Hematite Nanoparticles ◽  
Total Reflectance ◽  
Ft Ir ◽  
First Time ◽  
Mediated Reduction

AbstractPrevious studies have shown that mineral surfaces may facilitate the reduction of plutonium though the mechanisms of the reduction are still unknown. The objective of this study is to use batch sorption and attenuated total reflectance Fourier transform infrared spectroscopy experiments to observe the surface-mediated reduction of plutonium on hematite nanoparticles. These techniques allow for in situ measurement of reduction of plutonium with time and may lead to a better understanding of the mechanisms of surface mediated reduction of plutonium. For the first time, ATR FT-IR peaks for Pu(VI) sorbed to hematite are measured at ∼ 916 cm

scholarly journals Application of attenuated total reflection infrared spectroscopy in the study ofPeruphasma schulteidefensive secretion

2007 ◽  
Vol 21 (3) ◽  
pp. 169-176 ◽  
Author(s):  
Michael P. Mcleod ◽  
Aaron T. Dossey ◽  
M. Khalique Ahmed
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Natural Product ◽  
Short Communication ◽  
Defensive Secretion ◽  
Structural Characteristics ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Ft Ir ◽  
Ir Study

In this short communication, we present the first Fourier Transform Infrared Absorbance (FT-IR) study of peruphasmal; a defensive secretion fromPeruphasma schultei. The spectral data collected are representative of the natural product structure proposed by Dossey et al. This study demonstrates the viability of FT-IR as another tool in the physical and biological chemist's repertoire for use in determining important structural characteristics from minute amounts of available sample.

IN SITU HIGH TEMPERATURE FT-IR STUDY OF THE INTERLAYER NAPHTHALENE-2,6-DISULFONATE IN Mg AND Al LAYERED DOUBLE HYDROXIDE

2011 ◽  
Vol 25 (31) ◽  
pp. 4185-4189
Author(s):  
EIJI KANEZAKI ◽  
MASAHIRO KATOH
Keyword(s):  
High Temperature ◽  
Layered Double Hydroxide ◽  
Basal Spacing ◽  
Vibration Band ◽  
Stretching Vibration ◽  
Ft Ir ◽  
Ir Study ◽  
Double Hydroxide ◽  
Heating Up

In high temperature in situ FT-IR (HTFTIR) spectra of Mg and Al layered double hydroxide with interlayer naphthalene-2,6-disulfonate ( Mg / Al / N 26 DS - LDH ), one S - O stretching vibration band of the non-coordinating - SO 3 group in the interlayer N 26 DS dianion is observed below 400 °C at 1035 cm-1 with keeping intensity. High temperature in situ X-ray diffraction (HTXRD) indicates that the basal spacing remains also constant up to 400 °C, MgSO 4 appears after the LDH collapses at 500 °C and some metal oxides are formed at higher temperature. Both results in HTXRD and HTFTIR indicate that the layered structure in this LDH is stable against heating up to 400 °C.

Development of a New Drilling Fluid Additive from Lignosulfonate

2012 ◽  
Vol 524-527 ◽  
pp. 1157-1160
Author(s):  
Jie Zhang ◽  
Gang Chen ◽  
Nai Wang Yang
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
High Temperature ◽  
Room Temperature ◽  
Drilling Fluid ◽  
Raw Material ◽  
Drilling Process ◽  
Temperature Decrease ◽  
Temperature Resistance ◽  
Ft Ir

Nitration-oxidation lignosulfonate (NOLS) was prepared using lignosulfonate (LS) as raw material. The product was characterized by Fourier Transform Infrared spectroscopy (FT-IR). The performance as a drilling fluid additive was evaluated with regard to rhology, filtration and temperature resistance. The results showed that NOLS can improve the viscosity under room temperature, decrease the viscosity under high temperature and reduce the filtration more effectively than that of lignosulfonate, which display its good temperature resistance. So NOLS may be used as sustained release nitrogen fertilizer in agriculture as it was abandoned after the drilling process.

Diffuse Reflectance FT-IR Analysis of Rosin Flux-Metal Oxide Interactions

1987 ◽  
Vol 41 (3) ◽  
pp. 460-463 ◽  
Author(s):  
Randy W. Snyder
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
High Temperature ◽  
Solder Joint ◽  
Metal Oxide ◽  
Diffuse Reflectance ◽  
Metal Carboxylate ◽  
Oxide Powders ◽  
Ft Ir ◽  
Ir Analysis

The use of diffuse reflectance Fourier transform-infrared spectroscopy for the analysis of rosin flux residues on metal oxide powders, after exposure to high-temperature soldering conditions, is examined. The flux is shown to solvate some metal ions to form metal-carboxylate salt complexes. The ability of nonactivated rosin flux to remove possible corrosion products of copper-tin/lead solder joint areas is discussed.

Reaction of Nitrogen Oxides with Black Carbon: An FT-IR Study

1988 ◽  
Vol 42 (4) ◽  
pp. 674-680 ◽  
Author(s):  
D. M. Smith ◽  
W. F. Welch ◽  
S. M. Graham ◽  
A. R. Chughtai ◽  
Brian G. Wicke ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Black Carbon ◽  
Oxides Of Nitrogen ◽  
Surface Species ◽  
Qualitative And Quantitative ◽  
Quantitative Studies ◽  
Ft Ir ◽  
Ir Study

Qualitative and quantitative studies of the reaction of black carbon with the oxides of nitrogen, including NO, NO2/N2O4, N2O, and N2O3, have been carried out with the use of Fourier transform infrared spectroscopy (FT-IR). The active reactant is shown to be NO2, whether it acts as a disproportionation product or as an impurity in the gas under study. FT-IR spectra of the surface species identify them as resulting from reaction of carbon with NO2. For paraffin candle soot which was exposed simultaneously to oxygen atoms, and nitric oxide at 298 K, the surface species also are due to NO2, formed by oxidative adsorption of NO on the soot surface.

Sign in / Sign up

Export Citation Format

Share Document