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Poly(2,6-diphenylphenylene oxide) is a low bleeding material with a low level of impurities, and has a high thermal stability (up to 350 °C). Before use poly(2,6-diphenylphenylene oxide) should be thermally conditioned with a high purity gas at elevated temperatures to remove any residual components.
The simplest member of the phenyl ether family is diphenyl ether (DPE), also called diphenyl oxide, the structure of which is provided in Figure 4. Low molecular weight polyphenyl ethers and thioethers are used in a variety of applications, and include high-vacuum devices, optics, electronics, and in high-temperature and radiation-resistant ...
Poly(p-phenylene oxide) (PPO), poly(p-phenylene ether) (PPE), poly(oxy-2,6-dimethyl-1,4-phenylene), often referred to simply as polyphenylene oxide, is a high-temperature thermoplastic with the general formula (C 8 H 8 O) n. It is rarely used in its pure form due to difficulties in processing.
It is often said the resonance stability of phenol makes it a stronger acid than that of aliphatic alcohols such as ethanol (pK a = 10 vs. 16–18). However, a significant contribution is the greater electronegativity of the sp 2 alpha carbon in phenol compared to the sp 3 alpha carbon in aliphatic alcohols.
ph 2 ph + o 2 → ph 2 p(o)oh An intermediate in this oxidation is diphenylphosphine oxide . The use of the diphenylphosphine–borane complex, Ph 2 PH•BH 3 avoids the problem of phosphine oxidation by protecting the phosphine from oxidation and is available through chemical vendors.
P. Patiromer; PEDOT-TMA; PEDOT:PSS; PIDA (polymer) Pliofilm; Poly-γ-glutamate; Poly(2,6-diphenylphenylene oxide) Poly(3,4-ethylenedioxythiophene) Poly(4-vinylphenol) Poly(hexamethylene carbonate) Poly(hydridocarbyne) Poly(methacrylic acid) Poly(p-phenylene oxide) Polyphenylene sulfide; Poly(p-phenylene vinylene) Polyacetylene; Polyallylamine ...
Such a mixture is well-suited for heat transfer applications because of the relatively large temperature range of its liquid state. A eutectic mixture (commercially, Dowtherm A) is 73.5% diphenyl ether and 26.5% biphenyl. [9] [10] Diphenyl ether is a starting material in the production of phenoxathiin via the Ferrario reaction. [11]
Poly(p-phenylene) (PPP) is made of repeating p-phenylene units, which act as the precursor to a conducting polymer of the rigid-rod polymer family. The synthesis of PPP has proven challenging, but has been accomplished through excess polycondensation with the Suzuki coupling method.