نتایج جستجو برای: poly 1 4 phenylene ether ether sulfone
تعداد نتایج: 3433402 فیلتر نتایج به سال:
High energy density, high temperature, and low loss dielectric polymers have drawn increasing attention in research owing to their potential applications power electronic pulsed devices. In this study, a new class of organo-soluble dipolar glass (DGPs) are synthesized via polycondensation post-functionalization poly(aryl ether)s (PAEs) based on phenolphthalin. Due the nonplanar backbone structu...
Poly(ether ether ketone) (PEEK) is a high-performance thermoplastic with distinctive combination of corrosion resistance, thermo-oxidative stability and outstanding physical mechanical properties at high temperatures. A pertinent step forward in the development this has been inclusion electrically conductive fillers to expand its functionality. In review an overview research on PEEK composites ...
The asymmetric synthesis of a chiral, nonracemic π-conjugated system with D2 point group of symmetry, dodecaphenylene 4 is described. In the key step, (−)-sparteineand Cu(II)-mediated oxidation of 2,2′-dilithio-1,1′-biaryls in ether gives the corresponding dimers, tetra-o-phenylenes, in 80% isolated yields and 50–60% ee’s. X-Ray crystallography confi rms the structure of rac-4 and its molecular...
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