| 固体高分辨13C NMR研究γ线辐照对结晶聚乙稀聚集态结构的影响 |
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| 引用本文： | 朱清仁,堀井文敬,等.固体高分辨13C NMR研究γ线辐照对结晶聚乙稀聚集态结构的影响[J].波谱学杂志,1990,7(1):33-42. |
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| 作者姓名： | 朱清仁 堀井文敬 |
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| 作者单位： | 中国科技大学结构中心, 合肥 |
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| 摘 要： | 结晶聚乙烯(PE)经60Coγ线辐照后,用固体高分辨13C NMR CP/DD MAS方法观测解析了辐射效果与具有片晶结构的结晶相,结晶-橡胶状无定形界面相以及橡胶状无定形相的聚集态结构的关系。考察了各相中的13C核自旋-晶格弛豫和自旋-自旋弛豫行为及辐照对其影响。得到辐照后产生交联,破坏,相转变及晶型变化等有意义的结果,对PE的辐照效应和机制的探讨提供了核磁共振的新实验证据。
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| 关 键 词： | 固体高分辨13CNMR 魔角旋转 交叉极化 聚乙烯辐射效果 界面相 |
| 收稿时间： | 1988-10-24 |
EFFECT OF γ-RAY ON MORPHOLOGY OF CRYSTALLINE POLYETHYLENE BY HIGH-RESOLUTION SOLID-STATE 13C NMR |
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| Zhu Qingren,Horii Fumitaka,Kitamaru Ryozo.EFFECT OF γ-RAY ON MORPHOLOGY OF CRYSTALLINE POLYETHYLENE BY HIGH-RESOLUTION SOLID-STATE 13C NMR[J].Chinese Journal of Magnetic Resonance,1990,7(1):33-42. |
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| Authors: | Zhu Qingren Horii Fumitaka Kitamaru Ryozo |
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| Institution: | 1. Structural Center University of Science and Technology of China, Hefei;2. Institute for Chemical Research Kyoto University, Uji, Kyoto 611, Japan |
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| Abstract: | Morphology of crystalline polyethylene (PE) irradiated under 60Co γ-ray has been investigated by the high-resolution solid-state 13C NMR. It is revealed that crystalline phases with lamella, rubbery amorphous phase and their interphase in PE behaved differently to the radiation in the dose range of 75-520 Mrad. The relexation parameters of T2C and line width were determined for different phases. Their relationship with the radiation is discussed. The phenomena of cross-linking, damage, phase transition and transition of crystal mode in different phases of PE after radiation has been observed, which offer a new proof about mechanism and effect of radiation on PE by the 13C NMR. |
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| Keywords: | High-resolution solid-state 13C NMR Magic-angle sample spinning Cross-polarization Radiation effect on crystalline PE Interphase |
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