利用准弹性中子散射研究金属氧化物团簇内部碳链的动态

张艺萱; 李阳

doi:10.11889/j.0253-3219.2016.hjs.39.110502

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利用准弹性中子散射研究金属氧化物团簇内部碳链的动态

核物理、交叉学科研究 | 更新时间：2021-05-24

- 利用准弹性中子散射研究金属氧化物团簇内部碳链的动态
- Study on the dynamics of the polymer chain confined in metal oxide cluster by quasielastic neutron scattering
- 核技术 2016年39卷第11期文章编号：110502
- 作者机构：
  
  中国核工业集团公司北京 100822
- 作者简介：
  
  [ "张艺萱,女,1986年出生,2011年于四川大学获硕士学位,工程师,研究领域为高分子化学、核工程与技术", "ZHANG Yixuan, female, born in 1986, graduated from Sichuan University with a master’s degree in 2011, engineer, focusing on nuclear engineering and polymer materials" ]
- 基金信息：
- DOI：10.11889/j.0253-3219.2016.hjs.39.110502
  中图分类号： TL99;O631.21
- 收稿日期：2016-08-13，
  
  修回日期：2016-09-20，
  
  纸质出版日期：2016-11
- 稿件说明：
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张艺萱, 李阳. 利用准弹性中子散射研究金属氧化物团簇内部碳链的动态[J]. 核技术, 2016,39(11):110502

Yixuan ZHANG, Yang LI. Study on the dynamics of the polymer chain confined in metal oxide cluster by quasielastic neutron scattering[J]. Nuclear techniques, 2016, 39(11): 110502
张艺萱, 李阳. 利用准弹性中子散射研究金属氧化物团簇内部碳链的动态[J]. 核技术, 2016,39(11):110502 DOI： 10.11889/j.0253-3219.2016.hjs.39.110502.

Yixuan ZHANG, Yang LI. Study on the dynamics of the polymer chain confined in metal oxide cluster by quasielastic neutron scattering[J]. Nuclear techniques, 2016, 39(11): 110502 DOI： 10.11889/j.0253-3219.2016.hjs.39.110502.

摘要

中子散射技术是研究凝聚态物质和材料性质的重要手段。通过将碳链植入金属氧化物团簇分子的内部，可以实现对碳链运动的彻底改变。通过分析中子谱得知，这些金属氧化物团簇分子内部的碳链的大尺度空间平移运动几乎被完全限制，碳链上的甲基和亚甲基的转动速度也被大幅度减慢。另外，碳链上的不同碳原子的运动有不均匀性。这些现象都表明，金属氧化物团簇分子对于其内部的高分子运动有强约束效应。该效应在金属氧化物团簇的包裹行为上有决定性作用。

Abstract

Background

Metal oxide clusters are very important inorganic materials

which are widely used in catalytic reactions. And neutron scattering is an important technique for the study of the condensed matters and materials.

Purpose

The aim is to study the dynamics of the polymer chain confined in metal oxide cluster molecules.

Methods

Quasielastic neutron scattering technique is employed to measure the dynamics of the sample. A theoretical model

which assumes that the vibrational

translational and rotational motions are independent of each other

is used to analyze the neutron spectra.

Results

The dynamics of the polymer chain confined in metal oxide cluster are highly restricted in space. The large-scale motion of the chain is greatly hindered. The rotations of the methyl group and methylene group are also slowed down.

Conclusion

The metal oxide cluster exhibits ultra-confinement effect on the polymer chains.

关键词

Keywords

references

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