Molar mass distribution in binary homopolymer blends by single-step two-dimensional liquid chromatography: Operation and data treatment

Authors
Clementi, Luis Alberto; Siskova, Alena; Meira, Gregorio Raul; Berek, Dusan; Vega, Jorge Ruben
Publication Year
2016
Language
English
Format
article
Status
Published version
Description
A single-step two-dimensional liquid chromatography technique is employed for estimating the individual molar mass distributions in blends of polystyrene and poly(methyl methacrylate). It involves an initial separation of the homopolymers by liquid chromatography under limiting condition of desorption (first column), followed by their fractionation by size exclusion chromatography (second Column). The technique requires a calibration stage with narrow standards for determining (for each homopolymer): a) the molar mass calibration of the complete fractionation system; and b) the band broadening function corresponding to the first column. Then, the molar mass distributions are estimated as Follows: i) the polymer blend is injected into the tandem of both fractionation columns; ii) the obtained bimodal chromatogram is pre-processed to isolate the homopolymer peaks; iii) each isolated chromatogram is corrected for the band broadening caused by the first column; and iv) the molar mass distributions areestimated from the band broadening corrected chromatograms and the corresponding molar mass calibrations. The analysis is straightforward and fast, but it requires a relatively elaborate calibration process.
Fil: Clementi, Luis Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Siskova, Alena. Slovak Academy of Science; Eslovaquia
Fil: Meira, Gregorio Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Berek, Dusan. Slovak Academy of Science; Eslovaquia
Fil: Vega, Jorge Ruben. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Subject
BINARY POLYMER BLENDS
LIQUID CHROMATOGRAPHY UNDER LIMITING CONDITION OF DESORPTION
SIZE EXCLUSION CHROMATOGRAPHY
MOLAR MASS DISTRIBUTION
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/24066