Search results
Results From The WOW.Com Content Network
Therefore, control of blanks is essential and storage time of samples on poly(2,6-diphenylphenylene oxide) is less than a month. Pre-filters based on sodium thiosulphate or Teflon may be appropriate to use. The breakthrough volumes are low for very volatile substances. This problem is partly solved by graphitised poly(2,6-diphenylphenylene oxide).
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 ...
Diphenyl ether is the organic compound with the formula (C 6 H 5) 2 O. It is a colorless, low-melting solid. It is a colorless, low-melting solid. This, the simplest diaryl ether , has a variety of niche applications.
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.
Another industrially significant epoxide is propylene oxide (PO, OCH 2 CHCH 3). PO is mainly used for alkoxylation to produce polyether polyols. The alkoxylation process is shown in simplified form: ROH + n OCH 2 CHCH 3 → R(OCH 2 CHCH 3) n OH. Polyols derived from PO have complex stereochemistry owing to the chirality of the propylene oxide.
Biphenyl (also known as diphenyl, phenylbenzene, 1,1′-biphenyl, lemonene [4] or BP) is an organic compound that forms colorless crystals. Particularly in older literature, compounds containing the functional group consisting of biphenyl less one hydrogen (the site at which it is attached) may use the prefixes xenyl or diphenylyl .
Diphenyl oxalate (trademark name Cyalume) is a solid whose oxidation products are responsible for the chemiluminescence in a glowstick. This chemical is the double ester of phenol with oxalic acid. Upon reaction with hydrogen peroxide, 1,2-dioxetanedione is formed, along with release of the two phenols. [2]
It can be used to synthesize (diphenyl)methyl esters and ethers with carboxylic acids and alcohols respectively. [5] [6] It can also generate (diphenyl)methyl carbene and nitrogen gas upon illumination by ultraviolet light or by heating. [7] [8] It can also be electrolyzed form a Ph 2 CN − 2 anion, which can decompose to form a Ph 2 C − ...