P-Dicumyl chloride

Indan formation is significant in polymerizations of styrene, a-methylstyrene, and p-alkyl-substituted styrenes, but is less important in p-me-thoxystyrene polymerizations [14], Indan formation is not possible in polymerizations of styrene derivatives substituted at both ortho positions and is suppressed in polymerizations of 3,5-disubstituted styrene derivatives due to steric hindrance [105]. Indan formation consumes initiator in attempts at polymerizing isobutene with cumyl chloride and p-dicumyl chloride initiators [280]. 

Ketmedy and Smith ) nthesised and characterised an a, co-d f-chloro)polyiso-butene using BCI3 with p-dicumyl chloride in methylene chloride. One fragment of the bifunctional cocatalyst was found in each polymer molecule as measured by doubledetection (uv and refractive index) GPC analysis. This result proved that initiation had taken place according to the following mechanism at each C-Cl bond ... 

New Products Prepared by the Inifer Technique. A new family of linear and three-arm star polyisobutylenes have been prepared by the inifer technique. The inifer systems used were cumyl chloride (minifer) p-dicumyl chloride (binifer) and sym-tricumyl chloride (trinifer) always in combination with BCI3 coinitiator (1) ... 

The p-dicumyl chloride/BCl3/isobutylene inifer system has been thoroughly investigated. Detailed characterization research including various chemical techniques [3,8,10],1H NMR spectroscopy [1,3,8], GPC equipped by dual RI and UV detectors [1], end-group determination by dehydrochlorination [9], and kinetic studies [8] proved that the structure of the product is as shown by formula I in Scheme I and that the molecule is perfectly bifunctional (Ern = 2.0). 

The exo-olefin is a precursor to a variety of chain-end-functionalized polymers via postpolymerization reaaions as shown in Scheme 37. Hydroxy-functionalized PIB has been utilized as a precursor for the preparation of RAFT macromo-lecular CTAs and carboxylic acid end-fimctionalized polymers. Telechelic PIB diols have been prepared using p-dicumyl chloride/BCU initiator system followed by dehydro-chlorination, hydroboration, and alkaline peroxide oxidation. Aldehyde end-fiinctionalized PIBs have been used to prepare carboxyl- and hydroxyl-terminated poly-mers. Carboxylic acid-functionalized PIBs have also been prepared from the oxidation of the methyl ketone-functionalized PIBs." The hydroxyl-functionalized PIBs have also been used to prepare methacrylate macromonomers by their reaction with methacryloyl chloride in the presence of triethylamine. The homopolymerization and copolymerization of these maaomonomers with methyl methacrylate were also reported. Cyanoacrylate-funaionalized PIBs prepared via the hydroxyl-functionalized PIB were also reported by Kennedy et al. ... 

Fig. 15. of poly(isobutyl vinyl ether) obtained with p-dicumyl chloride (pDCC)/ AgSbFg in CH2CIJ at —90 °C as a function of the total amount of added monomer ... 

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. 

Dicumyl chloride 61 p-Dicumyl methyl ether 10 Dielectric constant 123 Diene insertion, carbon-metal bond 165... 

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