Identification of block copolymers and determination of their purity by thin-layer chromatography.
The application of adsorption, precipitation and extraction thin-layer chromatography to the identification of block copolymers, determination of their homogeneity (mixtures of homopolymers), and evaluation of their compositional homogeneity by one- and two-dimensional, multistage and gradient methods, is described. To detect the polymers on the thin-layer plate, various methods of detection are used, including those specific for each component of the block copolymer. Examples of analysis of the following block copolymers by thin-layer chromatography are reported: PS-PMMA, PS-PB, PS-PAN, PS-PBG, PI-PMS-PI, PMMA-PBMA, PMMA-PBG, PS-PEO.
Gankina
E S
ES
Institute of Macromolecular Compounds of the Academy of Sciences of the USSR, Leningrad, USSR.
Efimova
I I
II
Kever
J J
JJ
Belenkii
B G
BG