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Dicumyl peroxide is an organic compound with the formula (C 6 H 5 CMe 2 O) 2 (Me = CH 3). Classified as a dialkyl peroxide, it is produced on a large scale industrially for use in polymer chemistry. It serves as an initiator and crosslinking agent in the production of low density polyethylene. [2]
Dialkyl peroxides, e.g., dicumyl peroxide, are synthesized by addition of hydrogen peroxide to alkenes or by O-alkylation of hydroperoxides. Diacyl peroxides are typically prepared by treating hydrogen peroxide with acid chlorides or acid anhydrides in the presence of base: [1] H 2 O 2 + 2 RCOCl → (RCO 2) 2 + 2 HCl H 2 O 2 + (RCO) 2 O → ...
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Depending on the conditions, autoxidation of cumene gives dicumyl peroxide or cumene hydroperoxide. Both reactions exploit the weakness of the tertiary C-H bond. The tendency of cumene to form peroxides by autoxidation poses safety concerns. [6] Tests for peroxides are routinely conducted before heating or distilling.
Peroxide crosslinking (PE-Xa): The crosslinking of polyethylene using peroxides (e.g. dicumyl peroxide or di-tert-butyl peroxide) is still of major importance. In the so-called Engel process , a mixture of HDPE and 2% [ 12 ] peroxide is at first mixed at low temperatures in an extruder and then crosslinked at high temperatures (between 200 °C ...
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In chemistry, main group peroxides are peroxide derivatives of the main group elements. Many compounds of the main group elements form peroxides ( R−O−O−R' ), and a few are of commercial significance.
UN Number Class Proper Shipping Name UN 2101? (UN No. no longer in use) tert-Butyl peroxymaleate (UN No. no longer in use) [1] UN 2102? (UN No. no longer in use) Di-tert-butyl peroxide (UN No. no longer in use) [1]