Understanding of detailed chain-folding structure is still challenging issue in polymer science. Solid-state NMR spectroscopy with selective 13C isotope labeling is applied to investigate local chain trajectory of isotactic-poly(1-butene) in melt grown crystals. 13C-13C double quantum (DQ) build-up curve of isolated 13C labeled chains highly relies on inter-nuclei distance, spin number, and spin topology originating from chain trajectory as well as 13C labeling sites. 13C-13C DQ NMR determines adjacent-reentry site, fraction, and chain-folding number of semi-crystalline polymers.

Chain-folding structure of a semi-crystalline polymer determined by <sup>13</sup>C-<sup>13</sup>C double quantum NMR

245th National Meeting (2013)

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Chain-folding structure of a semi-crystalline polymer determined by 13C-13C double quantum NMR

Chain-folding structure of a semi-crystalline polymer determined by ¹³C-¹³C double quantum NMR