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HPLC‐ 1 H‐NMR Characterization of Polystyrene‐ block ‐Polyisoprene Copolymers: LCCC‐ 1 H‐NMR Using a Single Mobile Phase
Author(s) -
Sinha Pritish,
Hiller Wolf,
Pasch Harald
Publication year - 2014
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201450305
Subject(s) - copolymer , polystyrene , nuclear magnetic resonance spectroscopy , molar mass , polymer chemistry , proton nmr , polymerization , phase (matter) , materials science , living anionic polymerization , anionic addition polymerization , chemistry , organic chemistry , polymer , composite material
Summary The analysis of PS‐ b ‐PI copolymers, synthesized by sequential living anionic polymerization was conducted by on‐line hyphenation of liquid chromatography at critical conditions (LCCC) and proton nuclear magnetic resonance spectroscopy ( 1 H‐NMR). Critical conditions were established for polyisoprene using 1,4‐dioxane as the mobile phase and varying the column oven temperature. At these critical conditions, the polyisoprene homopolymer formed during synthesis was separated from the copolymer. The molar mass of the PS block, the chemical composition of the block copolymers as well as the microstructure of PI were determined in a single experiment.