Three-Dimensional Conformation of Folded Polymers in Single Crystals
The chain-folding mechanism and structure of semicrystalline polymers have long been controversial. Solid-state NMR was applied to determine the chain trajectory of (13)C CH3-labeled isotactic poly(1-butene) (iPB1) in form III chiral single crystals blended with nonlabeled iPB1 crystallized in dilut...
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| Veröffentlicht in: | Physical review letters 2015-10, Vol.115 (16), p.168301-168301, Article 168301 |
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| creator | Hong, You-lee Yuan, Shichen Li, Zhen Ke, Yutian Nozaki, Koji Miyoshi, Toshikazu |
| description | The chain-folding mechanism and structure of semicrystalline polymers have long been controversial. Solid-state NMR was applied to determine the chain trajectory of (13)C CH3-labeled isotactic poly(1-butene) (iPB1) in form III chiral single crystals blended with nonlabeled iPB1 crystallized in dilute solutions under low supercooling. An advanced (13)C-(13)C double-quantum NMR technique probing the spatial proximity pattern of labeled (13)C nuclei revealed that the chains adopt a three-dimensional (3D) conformation in single crystals. The determined results indicate a two-step crystallization process of (i) cluster formation via self-folding in the precrystallization stage and (ii) deposition of the nanoclusters as a building block at the growth front in single crystals. |
| doi_str_mv | 10.1103/PhysRevLett.115.168301 |
| format | Article |
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| source | American Physical Society Journals |
| title | Three-Dimensional Conformation of Folded Polymers in Single Crystals |
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