Comprehensive Microstructure and Molar Mass Analysis of Polybutadiene by Multidimensional Liquid Chromatography

2015 ◽  
Vol 36 (24) ◽  
pp. 2137-2142 ◽  
Author(s):  
Khumo Maiko ◽  
Harald Pasch
Keyword(s):  
Liquid Chromatography ◽  
Molar Mass ◽  
Mass Analysis

Reduced sample recovery in liquid chromatography at critical adsorption point of high molar mass polystyrene

2008 ◽  
Vol 44 (2) ◽  
pp. 514-522 ◽  
Author(s):  
E. Beaudoin ◽  
A. Favier ◽  
C. Galindo ◽  
A. Lapp ◽  
C. Petit ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Molar Mass ◽  
High Molar Mass ◽  
Sample Recovery

scholarly journals Separation of Poly(styrene-block-t-butyl methacrylate) Copolymers by Various Liquid Chromatography Techniques

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Tina Šmigovec Ljubič ◽  
David Pahovnik ◽  
Majda Žigon ◽  
Ema Žagar
Keyword(s):  
Liquid Chromatography ◽  
Block Copolymers ◽  
Molar Mass ◽  
Small Difference ◽  
Reversed Phase ◽  
Butyl Methacrylate ◽  
Critical Conditions ◽  
Chromatographic Techniques ◽  
Methacrylate Copolymers ◽  
Gradient Liquid Chromatography

The separation of a mixture of three poly(styrene-block-t-butyl methacrylate) copolymers (PS-b-PtBMA), consisting of polystyrene (PS) blocks of similar length andt-butyl methacrylate (PtBMA) blocks of different lengths, was performed using various chromatographic techniques, that is, a gradient liquid chromatography on reversed-phase (C18 and C8) and normal-phase columns, a liquid chromatography under critical conditions for polystyrene as well as a fully automated two-dimensional liquid chromatography that separates block copolymers by chemical composition in the first dimension and by molar mass in the second dimension. The results show that a partial separation of the mixture of PS-b-PtBMA copolymers can be achieved only by gradient liquid chromatography on reversed-phase columns. The coelution of the two block copolymers is ascribed to a much shorter PtBMA block length, compared to the PS block, as well as a small difference in the length of the PtBMA block in two of these copolymers, which was confirmed by SEC-MALS and NMR spectroscopy.

scholarly journals Solution viscosity – molar mass relationships for poly(butylene succinate) and discussion on molar mass analysis

2015 ◽  
Vol 9 (5) ◽  
pp. 424-434 ◽  
Author(s):  
Q. Charlier ◽  
E. Girard ◽  
F. Freyermouth ◽  
M. Vandesteene ◽  
N. Jacquel ◽  
...  
Keyword(s):  
Molar Mass ◽  
Solution Viscosity ◽  
Mass Analysis ◽  
Butylene Succinate

Accurate mass analysis and structure elucidation of selenium metabolites by liquid chromatography electrospray time-of-flight mass spectrometry

2007 ◽  
Vol 22 (8) ◽  
pp. 947-959 ◽  
Author(s):  
Juan F. García-Reyes ◽  
Mihaly Dernovics ◽  
Pilar Ortega-Barrales ◽  
Amadeo R. Fernández-Alba ◽  
Antonio Molina-Díaz
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Structure Elucidation ◽  
Time Of Flight ◽  
Accurate Mass ◽  
Mass Analysis ◽  
Flight Mass Spectrometry ◽  
Accurate Mass Analysis

Chromatographic behaviour of low molar-mass polyesters in normal-phase high-performance liquid chromatography

2000 ◽  
Vol 52 (5-6) ◽  
pp. 325-333 ◽  
Author(s):  
H. J. A. Philipsen ◽  
H. A. Claessens ◽  
P. Jandera ◽  
M. Bosman ◽  
B. Klumperman
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Molar Mass ◽  
Normal Phase ◽  
Chromatographic Behaviour
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