Detection of Site-dependent Segmental Mobility of Polymer by Fluorescent Defocused Imaging

De-sheng Li; Jing-fa Yang; Jiang Zhao

doi:10.1007/s10118-017-1976-8

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Detection of Site-dependent Segmental Mobility of Polymer by Fluorescent Defocused Imaging

Papers | Updated：2021-02-18

- Detection of Site-dependent Segmental Mobility of Polymer by Fluorescent Defocused Imaging
- Chinese Journal of Polymer Science Vol. 35, Issue 12, Pages: 1488-1496(2017)
- Affiliations：
  
  a.Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  b.The University of Chinese Academy of Sciences, Beijing 100049, China
- Author bio：
  
  Jiang Zhao (赵江), E-mail:jzhao@iccas.ac.cn
- Funds：
- DOI：10.1007/s10118-017-1976-8
  CLC：
- Received：08 April 2017，
  
  Revised：2017-05-09，
  
  Accepted：10 May 2017，
  
  Published：05 December 2017
- Accepted：
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De-sheng Li, Jing-fa Yang, Jiang Zhao. Detection of Site-dependent Segmental Mobility of Polymer by Fluorescent Defocused Imaging[J]. Chinese Journal of Polymer Science, 2017, 35(12): 1488-1496.
DOI：

De-sheng Li, Jing-fa Yang, Jiang Zhao. Detection of Site-dependent Segmental Mobility of Polymer by Fluorescent Defocused Imaging[J]. Chinese Journal of Polymer Science, 2017, 35(12): 1488-1496. DOI： 10.1007/s10118-017-1976-8.

摘要

Abstract

Polymer chain ends play an important role in the glassy dynamics of polymeric materials. In this study

a combination of single molecule defocus fluorescence microscopy and well-controlled atom transfer radical polymerization was used to investigate site-dependent segmental mobility of poly(

-butyl methacrylate). As the temperature increased

the rotation of fluorophores

which were selectively labelled in chain end and chain middle

was gradually activated. The power spectra of rotation trajectories

the distribution of angular displacement as well as the population of rotating fluorophores demonstrated that the local dynamics was more activated at the chain ends than the middles

showing the unique contribution of the chain end to the dynamics of the system.

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references

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