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Temperature-variable 11B-NMR spectra of poly(NIPAAm-block-NIPAAm-co-PBA) in D2O from 4 to 40 °C (a) and the 11B-chemical shift (open triangle) and normalized peak area intensities (open circle) of boronic-acid groups against BF3·OEt2 (b). BF3·OEt2 was used as the external reference.
