Two-Dimensional Chromatographic Analysis of Polystyrene-block-poly(methyl methacrylate) Copolymers Synthesized by Selective Oxidation of Polystrene-9-borabicyclo[3.3.1]nonane

2010 ◽  
Vol 298 (1) ◽  
pp. 174-181 ◽  
Author(s):  
Wael K. Elhrari ◽  
Peter E. Mallon
e-Polymers ◽  
2002 ◽  
Vol 2 (1) ◽  
Author(s):  
Harald Pasch ◽  
Kibret Mequanint ◽  
Adrian Jörg

AbstractPoly(styrene-block-methyl methacrylate)s were fully analyzed by liquid chromatography at the critical point of adsorption (LC-CC) and two-dimensional chromatography. Operating at chromatographic conditions corresponding to the critical points of the homopolymers polystyrene and poly(methyl methacrylate), the block lengths distributions for the different blocks of the block copolymers were determined quantitatively. Information on the amounts and molar mass distributions of homopolymers and coupling products that were identified in the samples as by-products was obtained by on-line coupled 2D chromatography. It was shown that a complete picture of the molecular heterogeneity of block copolymers can be obtained only when information from different chromatographic experiments is combined. Size exclusion chromatography alone is inappropriate for evaluating the molecular heterogeneity of such samples.


2005 ◽  
Vol 38 (26) ◽  
pp. 10623-10626 ◽  
Author(s):  
Kwangsok Kim ◽  
Sung Jun Cho ◽  
Sung Tae Kim ◽  
In-Joo Chin ◽  
Hyoung Jin Choi

Langmuir ◽  
2009 ◽  
Vol 25 (20) ◽  
pp. 12144-12150 ◽  
Author(s):  
Qin Li ◽  
K. H. Aaron Lau ◽  
Eva-Kathrin Sinner ◽  
Dong Ha Kim ◽  
Wolfgang Knoll

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