Preheat Compression Molding for Polyetherketoneketone: Effect of Molecular Mobility

Xiao-Hua Zhang; Meng-Xiao Jiao; Xin Wang; Bo-Lan Li; Feng Zhang; Yan-Bo Li; Jing-Na Zhao; He-Hua Jin; Yu Yang

doi:10.1007/s10118-021-2649-1

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Preheat Compression Molding for Polyetherketoneketone: Effect of Molecular Mobility

Papers | Updated：2021-11-20

- Preheat Compression Molding for Polyetherketoneketone: Effect of Molecular Mobility
- Chinese Journal of Polymer Science Vol. 40, Issue 2, Pages: 175-184(2022)
- Affiliations：
  
  a.Key Laboratory of Textile Science & Technology (Ministry of Education), College of Textiles, and Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China
  b.Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
  c.Key Laboratory of Carbon Materials, National Engineering Laboratory for Carbon Fiber Technology, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
- Author bio：
  
  zhangxh@dhu.edu.cn
- Funds：
  
  This work was financially supported by the Fundamental Research Funds for the Central Universities (No. 2232021G-01) and the National Natural Science Foundation of China (No. 51862036).
- DOI：10.1007/s10118-021-2649-1
  CLC：
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Xiao-Hua Zhang, Meng-Xiao Jiao, Xin Wang, et al. Preheat Compression Molding for Polyetherketoneketone: Effect of Molecular Mobility. [J]. Chinese Journal of Polymer Science 40(2):175-184(2022)
DOI：

Xiao-Hua Zhang, Meng-Xiao Jiao, Xin Wang, et al. Preheat Compression Molding for Polyetherketoneketone: Effect of Molecular Mobility. [J]. Chinese Journal of Polymer Science 40(2):175-184(2022) DOI： 10.1007/s10118-021-2649-1.

摘要

Abstract

Polyetherketoneketone (PEKK) is a new evolving polymeric material, and is considered as another important member of the polyaryletherketone (PAEK) family in addition to polyetheretherketone (PEEK). Hot compression molding can be used to compact and consolidate the PEKK products, where the temperature and pressure play key roles to affect the molecular mobility, entanglement and crystallization, and thus the mechanical properties of PEKKs. In this study, a preheating treatment was introduced in the compression molding, and it is found that such preheating is very essential to avoid the formation of crystal Form II, based on the increased chain entanglement. Molecular dynamics simulations revealed that the molecular mobility is always suppressed when a compression is applied. Therefore, by increasing the entanglement ,via, the preheating and maintaining such entanglement in the consequent compression molding, strong and tough PEKK materials were obtained, with a negligible fraction of crystal Form II.

关键词

Keywords

PolyetherketoneketoneMolecular mobilityCompression moldingMechanical properties

references

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