چكيده لاتين :
Ionic liquids (IL)s represent an attractive and potentially very valuable group of new
solvents, which have the benefit of low vapour pressure and therefore easier handling
than many conventional solvents. These liquids, because of their unique properties,
are attracting a lot of attention to replace volatile organic solvents, eco-friendly
and green media. This work describes microwave-assisted polyamidation reaction of 5(
2-phthalimidyl-3-methylbutanoylamino)isophthalic acid as a diacid monomer with various
aromatic diamines such as 4,4י-diaminodiphenyl sulphone, 4,4י-diaminodiphenylether,
4,4י-diaminodiphenyl methane, benzidine, p-phenylenediamine, mphenylenediamine,
2,5-diaminotoluene and 1,5-naphthalene diamine in the presence
of different imidazolium salts and triphenyl phosphite without adding extra compounds.
This technique of polymerization is a very fast and green process for polymer synthesis.
This polymerization method benefits the advantages of elimination of volatile and
toxic solvents such as NMP, very short reaction time and direct polymerization, so there
is no need of preparation of diacid chloride and therefore, saves time and energy in this
procedure. This method gave polyamides (PAs) with inherent viscosities ranging from
0.32-0.66 dLg-1. The resulting wholly aromatic PAs with bulky pendent groups, each
has polyisophthalimide backbone substituted with phthalimide and S-valine groups in
ring position 5 of the diacid, and different aromatic diamines. These polymers have chiral
centre in the pendant groups and show optical activity. They were characterized by
FTIR, 1H NMR, elemental analysis and specific rotation techniques. Introduction of
bulky and flexible clusters in these polymers pendant group; make them soluble in most
polar aprotic solvents. Thermogravimetric analysis showed that these PAs exhibit high
thermal stability.
