| 紫外光辐照镍系聚丁二烯的NMR研究 |
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| 引用本文： | 马燕,孙万赋,王强,赵新.紫外光辐照镍系聚丁二烯的NMR研究[J].波谱学杂志,2009,26(2):255-263. |
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| 作者姓名： | 马燕 孙万赋 王强 赵新 |
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| 作者单位： | [1.新疆大学 理化测试中心，新疆 乌鲁木齐 830046；2.波谱与原子分子物理国家重点实验室(中国科学院 武汉物理与数学研究所)，湖北 武汉 430071] |
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| 基金项目： | 波谱与原子分子物理国家重点实验室资助课题 |
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| 摘 要： | 用1H NMR谱，13C NMR谱，二维谱，X-射线衍射等方法研究了镍系高顺式聚丁二烯橡胶(NiBR) 在强紫外（UV）光辐照前后的微观结构变化和分子运动情况. 分析表明NiBR样品随着UV光辐照时间的增加，侧链乙烯基端基双键比主链端基双键更易发生氧化反应；并且随着NiBR样品的各基团的半峰宽值逐渐增加，表明NiBR在UV辐照过程中发生了部分交联反应. 样品的X-射线衍射谱图中结晶峰强度随UV光辐照时间的增加逐渐降低，表明样品的晶形无序程度增加了. 自旋-晶格弛豫时间（T1）和自旋-自旋弛豫时间（T2）值给出了有关NiBR辐照前后分子运动变化的信息.
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| 关 键 词： | X-衍射 核磁共振(NMR) NiBR 辐照效应 |
| 收稿时间： | 2008-10-9 |
| 修稿时间： | 2008-12-19 |
The Effects of UV Irradiation on 1,4-Polybutadiene Studied by NMR Spectroscopy |
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| MA Yan,SUN Wan-fu,WANG Qiang,ZHAO Xin.The Effects of UV Irradiation on 1,4-Polybutadiene Studied by NMR Spectroscopy[J].Chinese Journal of Magnetic Resonance,2009,26(2):255-263. |
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| Authors: | MA Yan SUN Wan-fu WANG Qiang ZHAO Xin |
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| Institution: | [1.The Center of Analysis and Measurement, Xinjiang University, Urumqi 830046, China; 2.State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics (Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences), Wuhan 430071, China] |
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| Abstract: | The effects of UV irradiation on high cis-1,4-polybutadiene (NiBR) were studied by 1D and 2D NMR spectroscopy, 1H relaxation time measurements and X-ray diffraction. The results indicated that, with the increase of UV irradiation time, oxidation reaction takes place more often in the side vinyl group terminated of polybutadiene than in the double bonds terminated in the main chain. Moreover, the increase of the half width of the peaks upon irradiation indicated that the crosslinking reaction had occurred. The X-ray diffraction data showed that the intensity of the crystallization peak decreased with the increase of UV irradiation time. This indicated that the crystal content of the sample was reduced by UV irradiation. The changes in 1H relaxation times provided important insight into the effects of irradiation on molecular segmental motion in the polymer. |
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| Keywords: | NiBR |
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