波谱学杂志 ›› 1989, Vol. 6 ›› Issue (4): 461-468.

• 研究论文 • 上一篇    下一篇

尼龙6结晶和动力学的固体高分辨13C NMR研究

王德华, 胡建治, 晏欣, 王国玺, 钱保功   

  1. 中国科学院武汉物理所波谱与原子分子物理开放研究实验室
  • 收稿日期:1989-01-21 修回日期:1989-06-12 出版日期:1989-12-05 发布日期:2018-01-22
  • 基金资助:
    The project supported by National Natural Science Foundation of China

CARBON-13 CP/MAS NMR STUDY OF THE NYLON 6 POLYMORPHS AND DYNAMICS

Dehua Wang, Jianzhi Hu, Xin Yan, Guoxi Wang, Baogong Qian   

  1. Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of physics, Academia Sinica, Wuhan, Hubei, P. R. China
  • Received:1989-01-21 Revised:1989-06-12 Online:1989-12-05 Published:2018-01-22
  • Supported by:
    The project supported by National Natural Science Foundation of China

摘要: 用MSL-400核磁共振(NMR)波谱仪记录了尼龙6的13C交叉极化魔角旋转(CP/MAS)NMR谱,发现固态下ω碳原子有两个峰,
α β γ δ ω-[CO-CH2-CH2-CH2-CH2-CH2-NH]-n尼龙6记为ω1ω2.在同一样品的13C NMR溶液谱中,这两个峰合并成一个峰,证明固态尼龙6中两种晶区是共存的.在固态,ω2峰比ω1峰向高场偏移2.2ppm.
测量了尼龙6-系列不同接触时间的CP/MAS NMR谱以研究动态行为.用SIMPLEX非线性最小二乘法拟合技术计算了交叉极化速率和质子TH用Ngai公式计算了固态尼龙6的运动参数.

关键词: 固体核磁共振, 动力学, 尼龙6

Abstract: C-13 CP/MAS spectra of nylon 6 were obtained on MSL-400 spectrometer. It was found that the ω carbon
α β γ δ ω-[CO-CH2-CH2-CH2-CH2-CH2-NH]-n, nylon 6,shows two peaks in the solid state. They are designated as ω1 and ω2 which originate from different crystalline components. The two peaks coalesced in solution spectrum of the same sample. It gives the evidence of coexistence of different crystalline regions in solid nylon 6. In the solid state the ω2 peak is 2.2 ppm upfield from the ω1 peak.
A series of CP/MAS spectra of nylon 6 was measured by varying the contact time to investigate the dynamic behavior. A SIMPLEX nonlinear least square optimization algorithm was applied to calculate the cross-polarization rates TIS and T1PH. The dynamic parameters of solid nylon 6 were calculated according to Ngai formalism.

Key words: Solid-State NMR, Dynamics, Nylon 6