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Synthesis and characterization of poly(ether ketone ketone) (PEKK)/sodium sulfonated poly(arylene ether ketone) (S-PAEK) block copolymers

✍ Scribed by Daoji Gan; Shiqiang Lu; Zhijian Wang

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
139 KB
Volume
50
Category
Article
ISSN
0959-8103

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✦ Synopsis

Abstract

A series of well‐defined poly(ether ketone ketone) (PEKK)/sodium sulfonated poly(aryl ether ketone) (S‐PAEK) block copolymers of high molecular weights was prepared by direct nucleophilic polymerization of hydroquinone with sodium 5,5′‐carbonylbis(2‐fluorobenzene sulfonate) (1) and PEKK oligomer (2). Varying the ratio of 1 to 2 used in polymerization can be used to control the degree of polymer sulfonation, which correspondingly affects the polymer solubility in solvents. Increasing content of 1 in the copolymers, slightly decreases their thermal stability which is nevertheless thermally stable up to 400 °C. Two T~g~ values, or one broad T~g~, were observed in the DSC measurements of the block copolymers, indicating the existence of phase separation, which was further proved by phase‐separated morphologies as shown in atomic force microscopy images.

© 2001 Society of Chemical Industry

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