Chemistry Reference
In-Depth Information
The polysulfone has following main characteristics: water absorp-
tion - 1.8% (within 5.64 × 10
4
sec); tensile strength - 90 MPa (20 °С)
and 30 MPa) (260 °С); bending strength - 120 MPa (20 °С) and 63 MPa
(260 °С); modulus in tension - 2.8 GPa (20 °С); molding shrinkage -
0.8%; electric inductivity at a frequency 60 Hz - 3.94; dielectric loss tan-
gent at 60 Hz - 0.003 [154-157].
The polysulphones have good resistance to the effect of acids, alkalis,
engine oils, oil products and aliphatic hydrocarbons.
The polysulfone “Astrel-600” can be reprocesses at harder conditions.
Depending on the size and shape of the article, the temperature of pressed
material should lie within the ranger of 315-410 °С while pressure should
be about 350 MPa [158]. The given polysulfone can be reprocessed by any
present method. Articles from it can be mechanically treated and welded.
Thanks to its properties, polysulfone finds broad use in electronique, elec-
trotechnique and avia-industry [159, 160].
The Refs. [161-163] reported in 1968 on the production of heat-re-
sistant polyarylenesulfonoxides “Arilon” of following constitution (com-
pany “Uniroyal,” USA):
“Arilon” has high rigidity, impact-resistance and chemical stability.
The gain weight was 0.9% after 7 days of tests in 20% HCl and 0.5% in
10% NaOH.
This polymer is suitable for long-term use at temperatures 0-130 C
and can be easily reprocessed into articles by die casting. It also can be
extruded and exposed to vacuum molding with deep drawing.
Given polysulfone finds application in different fields of technique as
constructional material.
Since 1972, the company “ICI” (Great Britain) has been manufacturing
the polyarylenesulfonoxide named “Victrex” which forms at homopoly-
condensation of halogenphenoles [164-166] of coming structure formula:
