Abstract
Inverse gas chromatography (IGC) was applied to amphiphilic graft copolymers of poly(2-hydroxyethyl methacrylate) (PHEMA) with polystyrene (PSt) branches using various probes at 160°C. Retention of tetradecane or amylbenzene, which selectively interacts only with PSt phase, suggested that a microphase inversion occurs around 20—30 wt% PSt, below which PSt segments constitute a discontinuous phase (islands). Rather nonselective probes such as dimethyl-formamide and 2-(2-methoxyethoxy)ethanol showed a retention which exceeds that expected from a simple additive relation, suggesting a considerable contribution of their interaction with the interface of the microphase-separated domains. In contrast, random copolymers showed a retention behavior as expected for a statistical distribution of the monomer units. General discussion is given on IGC as a means of characterizing binary polymer systems.
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Ito, K., Masuda, Y., Shintani, T. et al. Inverse Gas Chromatography on Graft and Random Copolymers of Styrene and 2-Hydroxyethyl Methacrylate. Polym J 15, 577–583 (1983). https://doi.org/10.1295/polymj.15.577
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DOI: https://doi.org/10.1295/polymj.15.577