The Infrared Spectra of Polymers II: Polyethylene

Infrared Spectra of High Polymers . II . Polyethylene *

The infrared spectrum of polyethylene has been obtained between about 3000 cm-1 and 70 em-I, polarization measurements on oriented specimens having been obtained to about 350 em-l. Assignments of the fundamentals are made with the help of a group theory analysis. The assignment of the controversial CH. wagging mode is discussed in detail and especially in terms of new evidence from the spectra ...

Crystal Structure and Infrared Spectra of Anhydrous (Adeninato )methylmercury(II)*

The title compound, C6H 7HgN5, belongs to the orthorhombic space group Pbcn, a == 14.658(8), b == 8.407(5), c == 13.006(9) A, D eal == == 2.898 g cm-3, Z == 8 molecules per cell. The structure was refined on 1132 unique nonzero reflections to R == 0.026. The crystal contains the same type of 1 : 1 monomeric molecule as the monohydrate, in which the CH3Hg group is bonded to the N(9) position of ...

Infrared Spectra of Tissues.

Near-Infrared Spectra of Ultraluminous Infrared Galaxies.

Near-infrared spectra with a resolution of lambda&solm0;Deltalambda approximately 1100 in the rest-wavelength range of 1.8-2.2 µm have been obtained for a complete sample of 33 ultraluminous infrared galaxies (ULIRGs). Of the 33 objects observed, two show evidence of a central active galactic nucleus (AGN) through either a broad Paschen-alpha line or emission in the 1.963 µm fine structure of [...

The Ultrafiltration Performance of Cellulose Acetate Asymmetric Membranes: A New Perspective on the Correlation with the Infrared Spectra

Integral asymmetric cellulose acetate (CA) membranes were casted by phase-inversion with formamide varying content - 22, 30 and 34% - as pore promoter. These membranes, CA-22, CA-30 and CA-34, were analyzed by infrared spectroscopy in attenuated total reflection mode (ATR-FTIR) to investigate the porous membrane matrix influence on the polymer/water/solute interactions and the selective ultrafi...