Chemistry Reference
In-Depth Information
polymers leads to increasing of glass transition temperature and lowering
of crystallinity degree, melting temperature and activation energy.
The methyl-substituted polyarylesterketones have been produced in Ref.
[375] be means of electrophylic polymerization of 4,4{}bis-(0-methylphe-
noxy)bisphenylketone or 1,4-bis(4-(methylphenoxy)benzoyl)benzene with
terephthaloyl or isophthaloyl chloride in 1,2-dichloroethane in the presence of
dimethylformamides and АlСl
3
. The polymers have glassing temperature and
melting point 150-170 °C and 175-254 °C.
The simple aromatic polyesterketones, which are of interest as construc-
tional plastics and film materials, capable of operating within the long time at
200 °C, have been synthesized [376-381] by means of polynitrosubstitution
reaction of 1,1-dichlor-2, 2-di(4-nitrophenyl)-ethylene and 4,4′-dinitrobenzo-
phenone with aromatic bisphenols.
The simple esterketone oligomer can be synthesized [378] also by poly-
condensation of aromatic diol with halogen-containing benzophenone at
150-250 °C in organic solvent in the presence of alkali metal compound as
catalyst and water.
The particles of polyesterketone have a diameter ≤50 micrometers,
intrinsic viscosity 0.5-2 dL/g (35 °C, the ratio
n
-chlorphenol: phenol is
90:10).
The simple polyesterketone containing lateral side cyano-groups, pos-
sessing the glass transition temperature in range l61-179 °C, has been pro-
duced [379] by low-temperature polycondensation of mix 2,6-phenoxy-
benzonitrile and 4,4′-bisphenoxybenzophenone with terephthaloylchloride
in 1,2-dichloroethane.
The simple polyarylesterketones, containing the carboxyl pendent
groups [380] and flexible segments of oxyethylene [381] have been syn-
thesized either.
Russian and foreign scientists work on synthesis of copolymers [382-
393] and block copolymers [394-399] of aromatic polyketones.
So, the high-molecular polyketones, having amorphous structure and
high values of glassing temperature, have been produced by copoly-
merizing through the mechanism of aromatic combination of 5,5-bis(4-
chlorbemzoyl)-2,2-dimethoxybisphenyl and 5,5-bis(3-chlorbenzoyl)-2,2-
dimetoxybishenyl with help of nickel complexes [382].
Terpolymers on the basis of 4,4′-bisphenoxybisphenylsulfone, 4,4′-bi-
sphenoxybenzophenone and terephthaloylchloride were produced in Ref.
[383] by low-temperature polycondensation. The reaction was lead in
