Untitled

Synthesis of block copolyetherether ketones and investigations of their properties

“…The results agree with the literature in which PEEKs obtained from bisphenol A and 4,4′‐dichlorodiphenylketone 7 and PEKs obtained from OKPPs 8 with different degrees of condensation and dichloranhydrides of isophthalic and terephthalic acids showed improved thermal and mechanical behaviors with an increased degree of condensation.…”

“…Probably this is the reason for the relatively low and similar values of the BCPEEK indices. As it is known, 8 under similar conditions the lower values of the dielectric characteristics correspond to the more compact packing of the polymers. This higher packing may also be responsible for the observed decrease in the tan δ (see Table II) of the BCPEEKs with longer OKs.…”

“…6, 7 Similarly, poly(etherether ketones) (PEEK) were synthesized from OKs of 2,2‐bis[4‐hydroxyphenyl]‐propane (bisphenol A) containing hydroxyl end groups and equimolar mixtures of dichlorides of isophthalic and terephthalic acids; their properties were also reported in the literature. 8…”

Novel ternary Fe3O4@polyaniline/polyazomethine/polyetheretherketone crosslinked hybrid membranes: fabrication, thermal properties and electromagnetic behaviours

“…The low-density polymer-based hybrid materials have aroused considerable concerns for their lightweight, high efficient, extensive absorption, exibility and easy processing advantages. [38][39][40][41][42] Therefore, it is an effective method to improve the comprehensive properties of the microwave-absorbing materials by introducing PEEK as the matrix. [33][34][35][36][37] Polyetheretherketone (PEEK) high performance plastic is one of the most ideal matrix polymers due to its outstanding properties, such as excellent mechanical property, thermal stability, ammability and non-toxic property.…”

The synthesis of block copolyetherketones based on 4,4′‐dichlorodiphenylketone, phenolphthaleine, and bisphenol A and investigation of their properties

“…Polyetherketones (PEK) based on different oligoketonephenolphthaleines and 4,4′dichlordiphenylketone with different condensation degrees was reported 19. Similarly, PEEK were synthesized from oligoketones of 2,2‐bis[4‐hydroxyphenyl]‐propane (bisphenol A) and 4,4′‐dichlorodiphenylketone 20. A new unsaturated block copolyether was obtained from a monomer described as 1,1‐dichlor‐2,2‐di(4‐oxyphenyl)etylene, polysulphone, and bisphenol A (or phenolphthaleine) 21.…”