The Effect of Entanglements between Molecules on Crystallization Behavior of PAN in Solidification Process

Zhen ZHU; Xin CHEN; Zhou-wen HE; Liang-hua XU; Chang-qing LI

doi:10.14028/j.cnki.1003-3726.2015.04.006

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The Effect of Entanglements between Molecules on Crystallization Behavior of PAN in Solidification Process

更新时间：2022-09-18

- The Effect of Entanglements between Molecules on Crystallization Behavior of PAN in Solidification Process
- Polymer Bulletin Vol. 28, Issue 4, Pages: 52-58(2015)
- 作者机构：
  
  1.国网智能电网研究院，北京　102211
  2.北京化工大学，北京　100029
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2015.04.006
  CLC：
- Published：2015-04，
  
  Received：07 May 2014，
  
  Revised：10 December 2014，
扫描看全文
Zhen ZHU, Xin CHEN, Zhou-wen HE, Liang-hua XU, Chang-qing LI. The Effect of Entanglements between Molecules on Crystallization Behavior of PAN in Solidification Process. [J]. Polymer Bulletin 28(4):52-58(2015)
DOI：

Zhen ZHU, Xin CHEN, Zhou-wen HE, Liang-hua XU, Chang-qing LI. The Effect of Entanglements between Molecules on Crystallization Behavior of PAN in Solidification Process. [J]. Polymer Bulletin 28(4):52-58(2015) DOI： 10.14028/j.cnki.1003-3726.2015.04.006.

摘要

制备不同浓度聚合物溶液凝固得到的PAN薄膜以及不同喷丝速率下得到的初生纤维

运用流变仪、 X射线衍射仪等进行表征

研究凝固过程中分子缠结对PAN分子结晶行为的影响。结果表明

聚合物溶液浓度的不同会影响聚合物溶液中分子线团的密集程度

从而影响分子之间的缠结

最终导致结晶行为发生变化。分子间缠结度越高

分子结晶度越低。剪切作用能够改变分子链的构象

促进分子间的解缠结

有利于提升 PAN分子的运动能力

增大PAN初生纤维的结晶度。

Abstract

Preparing PAN films by expelling the solvent in polymer solution of different concentration with double diffusion and gathering PAN nascent fibers through various jet rate. The effect of entanglements between molecules on crystallization behavior of PAN molecules in solidification process was studied by rheometer

X-ray diffraction etc. The results show that the differences of polymer solution concentration affect the intensity of molecular chain in polymer solution which affects the entanglements between molecules and crystallization behavior. The stronger entanglement is

the lower crystallization is. Shearing could change the conformation of molecular chain

which promotes to weaken the entanglements so that it is benefit to elevate the activity of polymer chain and the crystallization of PAN nascent fiber.

关键词

分子缠结结晶度极性分子线团

Keywords

Molecular entanglementsCrystallinityPolarityMolecular mass

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