Chemistry Reference
In-Depth Information
The chemical stability of polyesterester ketone “Victrex
R
” is about the
same as of polytetrafluorethylene while its long-term strength and impact
toughness are essentially higher than those or nylon А-10 [223].
The manufacture of the polyesteresterketones in Japan is organized
by companies “Mitsui Toatsu Chem” under the labels “Talpa-2000”, “ICI
Japan,” “Sumitoma Kogaku Koge.” The Japanese polyesteresterketones
have glassing temperature 143 C and melting point 334 C [224, 225].
The consumption of polyesteresterketones in Japan in 1984 was
20 tons, 1 kilogram cost 17000 Ian. The total consumption of polyester-
sulfones and polyesteresterketones in Japan in 1990 was 450-500 tons per
year [226].
Today, 35% of polyesteresterketones produced in Japan (of general
formula [−ОС
6
Н
4
−О−С
6
Н
4
−СО−С
6
Н
4
−]
n
) are used in electronics and
electrotechnique, 25% - in aviation and aerospace technologies, 10% - in
car manufacture, 15% - in chemical industry as well as in the fields of
everyday life, for example at producing the buckets for hot water, operat-
ing under pressure and temperature up to 300 °C. The Japanese industrial
labels of polyesteresterketones have good physical-mechanical character-
istics: the high impact toughness; the heat resistance (152 °C, and 286 °C
with introduction of 20% of glass fiber); the chemical resistance (bear
the influence of acids and alkalis, different chemicals and medicines), the
tolerance for radiation action; the elasticity modulus 250-300 kg/mm
2
;
the rigidity; the lengthening of 100%; the negligible quantity of smoke
produced. The polyesteresterketone can be reprocessed by die casting at
300-380 °C (1000-1400 kg/cm
2
), extrusion, formation and others meth-
ods [224]. High physical-mechanical properties remain the dame for the
long time and decrease on 50% only after 10 years.
The polymer is expensive. One of the ways for reducing the product
price is compounding. The company “Kogaku Sumitoma” created com-
pounds “Sumiploy K” on the basis of polyesteresterketones by their origi-
nal technology. The series “Sumiploy K” includes the polymers with high
strength and of improved wear resistance. The series “Sumiploy SK” is
based on the polyesteresterketone alloyed with other polymers [224]. The
series includes polymers, the articles of which can be easily taken out from
the form, and products are of improved wear resistance, increased high
strength, good antistatic properties, can be easily metalized.
The company “Hoechst” (Germany) produces unreinforced polyes-
teresterketones “Hoechst X915,” armored with 30 weight% of glass
