How to Teach the Conductivity of Polymer (I)—The Materials with One-dimensional Structure Are Nonconductive

Tao WANG; Ping-sheng HE

doi:10.14028/j.cnki.1003-3726.2018.04.012

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How to Teach the Conductivity of Polymer (I)—The Materials with One-dimensional Structure Are Nonconductive

更新时间：2022-09-05

- How to Teach the Conductivity of Polymer (I)—The Materials with One-dimensional Structure Are Nonconductive
- Polymer Bulletin Vol. 31, Issue 4, Pages: 95-99(2018)
- 作者机构：
  
  1.南昌大学材料科学与工程学院, 南昌 330031
  2.中国科学技术大学高分子科学与工程系, 合肥 230026
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2018.04.012
  CLC：
- Published：20 April 2018，
  
  Received：22 October 2017，
  
  Revised：18 December 2017，
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Tao WANG, Ping-sheng HE. How to Teach the Conductivity of Polymer (I)—The Materials with One-dimensional Structure Are Nonconductive. [J]. Polymer Bulletin 31(4):95-99(2018)
DOI：

Tao WANG, Ping-sheng HE. How to Teach the Conductivity of Polymer (I)—The Materials with One-dimensional Structure Are Nonconductive. [J]. Polymer Bulletin 31(4):95-99(2018) DOI： 10.14028/j.cnki.1003-3726.2018.04.012.

摘要

一般来说，由共价单键连接起来的高分子链已经没有了能够自由运动的电子（载流子），加上主要靠范德华力堆砌的聚合物分子之间距离较大，电子云交叠差，载流子的离域运动极为困难，因此聚合物通常是绝缘体。但是，即使像聚乙炔那样具有

键结构、其主链每个碳原子上带有一个导电电子的聚合物也不能导电，这是因为高分子链是一维体系，空间结构维度性决定了其导电性。一维结构的材料具有派尔斯不稳定性，使得即使每个原子都有导电的价电子，它也不会（在低温下）导电，这是一条普遍的物理规律。

Abstract

Generally

polymer is an insulator due to that polymer chain connected by the covalent single bond does not contain free electrons (carriers). In addition

macromolecular chains are coherent with each other through Van der Waals forces

and hence have large distance between them resulting in poor electron clouds overlapping

so that it is much difficult for carriers’ delocalization. Likewise

polymer even with

-bond and conductive electrons

such as polyacetylene

is nonconductive as well. The reason is the one-dimensional chain structure in which Peierls instability occurs.

关键词

聚合物导电性派尔斯不称定性一维体系

Keywords

PolymerconductivityPeierls instabilityOne-dimensional system

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