波谱学杂志 ›› 1993, Vol. 10 ›› Issue (2): 109-116.

• 研究论文 •    下一篇

AB-交联聚合物(PPU/PS)中分子运动和相容性的固态高分辨NMR研究

贾铭椿1, 沈联芳1, 钱保功1, 姚树人2   

  1. 1. 中国科学院武汉物理研究所, 武汉 430071;
    2. 海军工程学院, 武汉 430033
  • 收稿日期:1992-03-09 修回日期:1992-06-19 出版日期:1993-06-05 发布日期:2018-01-20
  • 基金资助:
    The project was supported by the National Natural science Foundation of China

SOLID STATE HIGH RESOLUTION NMR STUDY OF THE MOLECULAR MOTION AND COMPATIBILITY OF AB-CROSSLINKED POLYMER BASED ON PPU/PS

Jia Mingchun1, Shen Lianfang1, Qian Baogong1, Yao Shuren2   

  1. 1. Wuhan Institute of Physics, The Chinese Academy of Sciences, Wuhan 430071;
    2. The Navel Academy of Engineering, Wuhan 430033
  • Received:1992-03-09 Revised:1992-06-19 Online:1993-06-05 Published:2018-01-20
  • Supported by:
    The project was supported by the National Natural science Foundation of China

摘要: 本文用固体高分辨NMR技术测量了AB-交联聚合物(即ABCP)PPU/PS(聚氨酯/聚苯乙烯)中侧甲基的13C弛豫时间T1。使用分子内旋转的平均谱密度函数分析了ABCP中CH3侧基的内旋转运动。结果表明PPU/PS,ABCP中PPU的CH3侧基运动与PS的含量有关。当体系发生相反转时,侧甲基的运动也发生一转变。这反映了侧甲基的运动与ABCP的宏观性质密切相关。对该ABCP体系还进行了1H T1ρ的测量,分析了其相容性。

关键词: 自旋-晶格外弛豫, AB-交联聚合物, 分子运动, 相容性

Abstract: The 13C T1s of side-CH3 group in PPU/PS, AB-crosslinked polymer were measured by using high resolution solid state NMR technique. The motion of side-CH3 group in this system was analyzed by means of the average spectral density functions of internal rotation. The results showed that the motion of side-CH3 group of PPU in PPU/PS ABCPs depends on the content of PS. There is a transition in-CH3 motion when the phase is reversed. The motion of-CH3 group is related closely to the macroscopic properties of the ABCP. The measurements of 1H Tlρ were also carried out.

Key words: Spin-lattice relaxation, AB-crosslinked polymer, Molecular motion, Compatibility