Hydrogen‐bonding‐based reversible polymer networks are prepared from poly(2‐(dimethylamino ethyl)methacrylate)‐block‐poly(ethylene oxide)‐block‐poly(2‐(dimethylamino ethyl)methacrylate) (PDMAEMA‐ co ‐PEO‐ co ‐PDMAEMA) triblock copolymer blends with lignin. FTIR and DSC analyses reveal miscible blends. Fitting of the T g /composition data using the Kwei equation produces significantly large positive q ‐values: +275 for PDMAEMA and +413 PDMAEMA‐ co ‐PEO‐ co ‐PDMAEMA. In solution the blends self‐assemble into a hydrogen‐bonded polymer network with a strong dependence on blend composition and solution pH. 1 H NMR spectra show that there is a clear core/corona transformation by adjust the solution pH.
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Gao et al. (2014) studied this question.
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