Effect of Substance Polarity in Coagulation Bath on PAN Crystallinity

Zhen ZHU; Jun-song YUAN; Yang XIAO; Wei WANG; Liang-hua XU

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Effect of Substance Polarity in Coagulation Bath on PAN Crystallinity

更新时间：2022-09-18

- Effect of Substance Polarity in Coagulation Bath on PAN Crystallinity
- Polymer Bulletin Vol. 26, Issue 2, Pages: 51-55(2013)
- 作者机构：
  
  北京化工大学碳纤维及功能高分子教育部重点实验室，北京　100029
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2013-02，
  
  Received：09 August 2012，
  
  Revised：15 October 2012，
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Zhen ZHU, Jun-song YUAN, Yang XIAO, Wei WANG, Liang-hua XU. Effect of Substance Polarity in Coagulation Bath on PAN Crystallinity. [J]. Polymer Bulletin 26(2):51-55(2013)
DOI：

Zhen ZHU, Jun-song YUAN, Yang XIAO, Wei WANG, Liang-hua XU. Effect of Substance Polarity in Coagulation Bath on PAN Crystallinity. [J]. Polymer Bulletin 26(2):51-55(2013) DOI：

摘要

采用恒温加热和双扩散两种脱除溶剂的方式制备PAN大分子薄膜

运用X射线衍射仪、傅里叶红外、紫外分光光度计等进行表征

研究凝固浴中沉淀剂极性对PAN大分子结晶度的影响。结果表明在凝固相分离过程中

沉淀剂对PAN大分子结晶度的影响是通过与氰基发生亲和作用实现的。沉淀剂极性越大

与PAN大分子之间亲合作用越强

对分子链的束缚越明显

使PAN分子调节自身构象变得困难

阻碍结晶的生长。电解质的加入能够弱化这种亲合作用

提高PAN的结晶度。

Abstract

PAN films were prepared by either isothermal heating or double diffusion to expel the solvent in the polymer solution. We used X-ray diffraction

FT-IR

UV spectrometer to investigate the effect of the polarity of the precipitant on the crystallization of PAN in the solutions. The results show that in the process of solidification

the effect of precipitant on PAN crystallization is achieved by the close association between precipitant and cyanogroup. The stronger polarity precipitants hold

the stronger association they form. Therefore

polymer chains are restricted more tightly to block the crystallization of PAN polymers. Addition of electrolyte can help to weaken the association and to improve PAN crystallinity.

关键词

PAN薄膜结晶度极性脱溶剂

Keywords

PAN filmsCrystallinityPolarityExpelling the solvent

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