6533b7ddfe1ef96bd12746b0

RESEARCH PRODUCT

Infrared linear dichroism spectroscopy by a double modulation technique

Volker AbetzReimund StadlerGerald G. Fuller

subject

Polymers and PlasticsPhotoelastic modulatorChemistrybusiness.industryInfrared spectroscopyGeneral ChemistryDichroismCondensed Matter PhysicsLinear dichroismDichroic glassSignal-to-noise ratioOptical modulatorOpticsMaterials ChemistrySpectroscopybusiness

description

A linear IR dichroism experiment has been devised using a FTIR instrument in combination with a photoelastic modulator. Based on the Mueller-Stokes calculus, a method to directly obtain the absorbance spectra Av parallel and Av perpendicular from the modulated interferogram is developped, which allows the sensitive evaluation of the dichroic ratio. The photoelastic modulator, in combination with a FTIR instrument, offers high sensitivity, high speed, excellent signal to noise ratio and a broad spectral range from 3300 to 850 cm-1. First experimental results obstained from SBS block copolymer are reported.

yearjournalcountryeditionlanguage
1990-04-01Polymer Bulletin
https://doi.org/10.1007/bf00294876