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Synthesis of novel poly(phthalazinone ether sulfone ketone)s and improvement of their melt flow properties
Author(s) -
Meng Y. Z.,
Hay A. S.,
Jian X. G.,
Tjong S. C.
Publication year - 1997
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/(sici)1097-4628(19971121)66:8<1425::aid-app1>3.0.co;2-g
Subject(s) - sulfone , ether , ketone , glass transition , condensation polymer , polymer chemistry , materials science , polymer , oligomer , organic chemistry , chemistry , composite material
A series of novel poly(phthalazinone ether sulfone ketone)s was synthesized from bis(4‐fluorophenyl) ketone, bis(4‐chlorophenyl)sulfone, and 4‐(4‐hydroxybenzyl)‐2,3‐phthalazin‐1‐one through nucleophilic substitution polycondensation. The synthesized polymers exhibited surprisingly high glass transition temperatures and had excellent thermooxidative properties. The melt viscosities of these synthesized polymers are generally too high to be processed by common processing methods because of their very high glass transition temperatures and amorphous microstructure. An attempt was made to reduce their melt viscosities by solution blending the synthesized polymer with two kinds of oligomers: low molecular weight poly(phthalazinone ether sulfone ketone) and commercial poly(ether sulfone). The results proved that the addition of the oligomers to the polymers led to a marked decrease in melt viscosities. Furthermore, no obvious changes were observed in the thermal and mechanical properties of these blends after oligomer additions. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 1425–1432, 1997