Dicumyl alcohol

Figure 3. Comparison of the infrared spectra of (A) natural rubber, (B) dicumyl peroxide, (C) dicumyl alcohol and (D) acetophenone in the 1800 cm to 450 cm region.

Figure 26. Superposed spectra of cured els-polybutadiene minus its components. Spectrum A, polybutadiene and the products of the degrading dicumyl peroxide. Spectrum B, cured spectrum minus uncured polybutadiene spectrum C, B minus dicumyl peroxide spectrum D, C minus dicumyl alcohol and spectrum E, D minus acetophenone. The amount of each component determined by least squares analysis.

Strictly speaking, it should be named as a,a-dihydroxy-p-diisopropyl-benzene, a tertiary aromatic dialcohol. The name dicumyl alcohol is used for convenience. 

Tertiary alcohols, dicumyl alcohol (The Goodyear Tire Rubber Company) and cumyl alcohol (Aldrich) were used to carry out the necessary conversion of excess isocyanate groups to amine groups as mentioned earlier Thus, these tertiary alcohols are not directly involved in the chain extension step The amount of excess MDI and tertiary alcohols... 

When cumyl alcohol is used instead of dicumyl alcohol to carry out in situ chain extension, some dissimilarity between the mechanical... 

The following commercially available dialkyl peroxides are produced according to equations 24—27 di-Z fZ-butyl peroxide from hydrogen peroxide and sulfated tert-huty alcohol or isobutylene dicumyl peroxide from a-cumyl hydroperoxide and cumyl alcohol, cumyl chloride, and/or a-methylstyrene m- and -di(2-/ f2 -butylperoxyisopropyl)ben2ene [2781-00-2] from tert-huty hydroperoxide [75-91-2] and m- and -di(2-hydroxyisopropyl)ben2ene ... 

The synthesis and purification of cumyl alcohol (CumOH), p-dicumyl methyl ether (DCE)) and 2-chloro-2,4,4-trimethylpentane (TMPC1), and the sources and purification of methyl chloride (MeCl), methylcyclohexane (MCHx), isobutylene have been described [9, 10]. P-Pinene (P-PIN), (Aldrich), was chromatographed over alumina (activity I, Fisher), and freshly distilled over CaH2 under nitrogen according to 1H-NMR spectroscopy and GC analysis the purity was >99%. 2,6-Di-/er/-butylpyridine (DtBP), (Aldrich), anhydrous A,A-dimethylacetamid (DMA), (Aldrich), ethylaluminum dichloride (EtAlCl2), 1.0 M solution in hexanes (Aldrich), and methanol (Fisher) were used as received. 

The polymers are further modified by allyl alcohol, trimethoxy-vinylsilane, allyl glycidyl ether, or maleic anhydride. The functionalization is effected by dicumyl peroxide. 

For ageing experiments the toluene solution of the grafted polymer was first treated with an excess of triphenyl phosphine (reduction of residual hydroperoxides into alcohols), then suitable amount of the parent polymer was added and co-precipitation was performed into methanol. The polymer blend was vulcanized by adding dicumyl peroxide (5% w)prior precipitation (pressing conditions became 190°C, 190 bar, 5 min). 

Stereoanalysis of 2-alkyl-branched acids, esters and alcohols in apple aroma concentrate Restriction capillary (25 m X 0.23 mm i.d.) coupled to a glass capillary column, (25 m X 0.32 mm i.d.) coated with a 18.8% solution of PS-255 and 1.5% dicumyl peroxide. Glass capillary column (38 m X 0.23 mm i.d.) coated with heptakis (2,3,6-tri-0-ethyl)-/3-cyclodextrin (33% in OV-1701-vinyl) 6... 

To obtain a heat and water resistant crosslinked polymer, Cu naphthenate and an alcohol (e.g. benzyl alcohol) were added to BPA/DC as a catalyst epoxide resins (cf. Sect. 6) can be used as well [19]. The use of Zn acetate together with dicumyl peroxide was also mentioned [20],... 

Mercury dicumyl yields white needles, M.pt. 1 14° C., soluble in alcohol, ether, chloroform, benzene, or xylene. It has a eliaracteristle smell and is easily decomposed when heated with liydrochloric acid. ... 

Evidence suggesting a change in the mode of peroxide decomposition under conditions of rapid thermolysis is provided by the decomposition of dicumyl peroxide in mineral oil ). Thus, although the yield of cumyl alcohol is the same whether the decomposition occurs at 135 or 180 C, the yield of acetophenone and methane, the products of ketonic scission of the cumyloxy radical, essentially doubles at the higher temperature. 

Activated attapulgite. See Attapulgite Activated carbon. See Carbon, activated Activated charcoal. See Charcoal, activated Activator 1102. See Dibutylammonium oleate Active 2. See Cocamide DEA Active 18. See Oleamide DEA Active amyl alcohol. See 2-Methyl-1-butanol Active carbon. See Carbon, activated Active dicumyl peroxide. See Dicumyl peroxide Active primary amyl alcohol. See2-Methyl-1-butanol... 

In addition to the sp C-H bond adjacent to nitrogen, sp C-H/sp C-H CDC reactions have also been successful adjacent to oigrgen. We discovered a palladium-catalyzed coupling of N-heterocycles with simple alcohols initiated by dicumyl peroxide (Scheme 1.12). ... 

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