Chain-Folding Structure of a Semicrystalline Polymer in Bulk Crystals Determined by 13C-13C Double Quantum NMR.
Chain-Folding Structure of a Semicrystalline Polymer in Bulk Crystals Determined by 13C-13C Double Quantum NMR.
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DOI：
10.1021/mz300630j
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发表时间：
2013-05
影响因子：
5.8
通讯作者：
You-lee Hong;Toshikazu Miyoshi
中科院分区：
文献类型：
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作者：
You-lee Hong;Toshikazu Miyoshi
提出了一种独特的方法，使用13 C-13 C双量子（DQ）NMR结合选择性13 C同位素标记研究合成聚合物在体相晶体中的链轨迹。由于DQ建立曲线高度依赖于耦合自旋数，拓扑结构和核间距，这源于选择性13 C-标记的聚合物的链轨迹，相邻的再进入位点和分数下有限的链折叠数可以确定。
A unique approach using 13C-13C double quantum (DQ) NMR combined with selective 13C isotope labeling is proposed to investigate the chain trajectory of the synthetic polymer in bulk crystals. Since the DQ buildup curve highly depends upon coupled spin number, topology, and internuclear distance, which originated from the chain trajectory of selectively 13C-labeled polymers, the adjacent re-entry site and fraction under finite chain-folding number can be determined.