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Dissolution and formation of polyacrylonitrile in low‐temperature molten salts
Author(s) -
Hettrich K.,
Fischer S.,
Brendler E.,
Voigt W.
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20000906)77:10<2113::aid-app3>3.0.co;2-f
Subject(s) - polyacrylonitrile , acrylonitrile , eutectic system , potassium thiocyanate , polymerization , polymer chemistry , thiocyanate , molten salt , polymer , dissolution , chemistry , materials science , solubility , inorganic chemistry , organic chemistry , copolymer , alloy
The solubility and the polymerization of polyacrylonitrile in low‐temperature molten salts was investigated. It was found, that the polymer dissolves in eutectic mixtures of molten sodium thiocyanate and potassium thiocyanate (NaSCN/KSCN) as well as in the molten hydrate lithium perchlorate (LiClO 4 *3H 2 O). The polymer can be regenerated by cooling the melt or diluting with water. The chemical interaction between the molten salt and the polymer was investigated by 13 C‐NMR spectroscopy. These measurements show that the dissolution of the polymer in molten KSCN/NaSCN is accompanied by the splitting of the the hydrogen bonds. Starting from acrylonitrile, the formation of polyacrylonitrile by a radical polymerization in a molten salt becomes successful. The polymerization of acrylonitrile in an eutectic mixture of KSCN/NaSCN results in the formation of atactic polyacrylonitrile with high molecular weight. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 2113–2117, 2000