Premium
Dissolution of Aramid by Ionization of Byproduct HCl Promoted by Acetate
Author(s) -
Dai Yu,
Cheng Zheng,
Meng Chenbo,
Yuan Yihao,
Luo Longbo,
Liu Xiangyang
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201801843
Subject(s) - dissolution , solubility , chemistry , thermogravimetric analysis , aramid , polymerization , inorganic chemistry , polyamide , chloride , amide , polymer , nuclear chemistry , polymer chemistry , organic chemistry , fiber
Poor solubility of high‐performance polymer has always been a leading bottleneck for its application. Para‐aramid fiber as a typical high‐performance fiber owns significant hydrogen‐bond interaction and chloride salts are generally needed to provide Cl − ions as hydrogen‐bond acceptors for its dissolution. In this paper, Poly‐(benzimidazole‐terephthalamide) (PABI) which complexed with by‐product HCl (PABI‐HCl) during polymerization was fabricated and by‐product HCl was regarded as potential Cl − ions donor. CH 3 COONa as cosolvent was added in DMAc to dissolve PABI‐HCl. It was confirmed that solubility of PABI‐HCl in DMAc could be improved significantly in existence of CH 3 COONa. The finding was characterized by conductivity measurement, UV‐Vis spectra, Atomic Absorbance Spectra and Thermogravimetric analysis etc. By‐product HCl as a strong acid was converted into CH 3 COOH due to existence of CH 3 COO − in solution. Then it would release Cl − ions and they could interact with secondary amide of aramid to disrupt interaction among macromolecules. Therefore, aramid was dissolved successfully by utilizing by‐product HCl and no external Cl − ions donor was needed.