enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Photo-oxidation of polymers - Wikipedia

    en.wikipedia.org/wiki/Photo-oxidation_of_polymers

    Charge-transfer complexes of oxygen and polystyrene phenyl groups absorb light to form singlet oxygen, which acts as a radical initiator. [23] Carbonyl impurities in the polymer (c.f. acetophenone) also absorb light in the near ultraviolet range (300 to 400 nm), forming excited ketones able to abstract hydrogen atoms directly from the polymer. [24]

  3. Schenck ene reaction - Wikipedia

    en.wikipedia.org/wiki/Schenck_ene_reaction

    The Schenck ene reaction or the Schenk reaction is the reaction of singlet oxygen with alkenes to yield hydroperoxides. The hydroperoxides can be reduced to allylic alcohols or eliminate to form unsaturated carbonyl compounds. It is a type II photooxygenation reaction, and is discovered in 1944 by Günther Otto Schenck. [1]

  4. Polycarbonate - Wikipedia

    en.wikipedia.org/wiki/Polycarbonate

    The main polycarbonate material is produced by the reaction of bisphenol A (BPA) and phosgene COCl 2. The overall reaction can be written as follows: The first step of the synthesis involves treatment of bisphenol A with sodium hydroxide, which deprotonates the hydroxyl groups of the bisphenol A. [6] (HOC 6 H 4) 2 CMe 2 + 2 NaOH → Na 2 (OC 6 ...

  5. Sodium percarbonate - Wikipedia

    en.wikipedia.org/wiki/Sodium_percarbonate

    Sodium percarbonate or sodium carbonate peroxide is a chemical substance with empirical formula Na 2 H 3 CO 6.It is an adduct of sodium carbonate ("soda ash" or "washing soda") and hydrogen peroxide (that is, a perhydrate) whose formula is more properly written as 2 Na 2 CO 3 · 3 H 2 O 2.

  6. Diallyl carbonate - Wikipedia

    en.wikipedia.org/wiki/Diallyl_carbonate

    The Tsuji-Trost reaction was first introduced in 1962. This method played an important role in the synthesis of diallyl carbonate. The first mention of its commercial production dates back to 1982, when Tokuyama Corporation synthesized it for the first time using the sodium carbonate method.

  7. Organic peroxides - Wikipedia

    en.wikipedia.org/wiki/Organic_peroxides

    Anthrahydroquinone reacts spontaneously with oxygen to form anthraquinone and hydrogen peroxide, possibly through some organic peroxide intermediate. After extraktion of the hydrogen peroxide the anthraquinone is catalytically reduced to anthrahydroquinone and reused in the process. There are other hydroquinones reacting in a similar fashion.

  8. Radical polymerization - Wikipedia

    en.wikipedia.org/wiki/Radical_polymerization

    Redox reactions Reduction of hydrogen peroxide or an alkyl hydrogen peroxide by iron (Figure 3). [2] Other reductants such as Cr 2+, V 2+, Ti 3+, Co 2+, and Cu + can be employed in place of ferrous ion in many instances. [1]

  9. Hydrogen peroxide - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_peroxide

    Hydrogen peroxide is a chemical compound with the formula H 2 O 2.In its pure form, it is a very pale blue [5] liquid that is slightly more viscous than water.It is used as an oxidizer, bleaching agent, and antiseptic, usually as a dilute solution (3%–6% by weight) in water for consumer use and in higher concentrations for industrial use.