Vinyl cyclohexane

Poly(vinyl cyclohexane) +90 +372 Steric hindrance of side group... 

S-B,.4 Polystyrene 1,4-Polybutadiene Poly(vinyl cyclohexane) Polyethylene Hydrogenation of both blocks... 

Vinyl cyclohexane and other similar monomers give analogous phantom polymers under similar conditions, and the reaction has been explored in great detail by Kennedy and his collaborators [9f, 74]. The occurrence of such relatively fast isomerizations makes it appear very likely that in these polymerizations the propagating species is a cation. 

Photolysis of rraHs-4,5-dibrorno-c.vfl-9,10-diazatricyclo[6.3.0.02 7]undec-9-ene (21, R = H) gave ra s-4,5-dibromo-c v >-tricyclo[6.1.0.02 7]nonane (22, R = H) as the major product.95 However, significant amounts of both stereoisomers of fratts-4,5-dibromo-l-methylenc-2-vinyl-cyclohexane (23, R = H) were also formed. 

The aziridine ring may also be opened in an electrophilic fashion. For example, the aziridine nucleus of the functionalized allyl silane 113 undergoes intramolecular ring opening in the presence of boron trifluoride etherate to give the aminomethyl vinyl cyclohexane 114 in 90% yield as a 2.7 1 mixture of cis and tram isomers [95TL3793]. 

Styrene undergoes copolymerisation with ethylene and various a-olefins in the presence of heterogeneous Ziegler-Natta catalysts. Its reactivity in the copolymerisation is quite low, which is illustrated by the values of the relative reactivity ratios, r and r2, presented in Table 4.5 [118]. One may note, however, a considerably high relative reactivity of styrene in copolymerisation with vinyl-cyclohexane. The copolymerisation of styrene with small amounts of a-olefin, such as 1-octene or 1-decene, yields copolymers of reduced crystallinity and thus reduced brittleness compared with the homopolymer of styrene. 

Difunctional epoxy diluents are low-viscosity, low-MW epoxy resins. These diluents may be used at very high concentrations, and they do not greatly affect the properties of the cured resin. In some instances the difunctional epoxy diluents will actually improve properties. These materials include butadiene dioxide, vinyl cyclohexane dioxide, and diglycidyl ether of resorcinol. 

An asymmetric variant of double-bond isomerization could be achieved with the chiral a ra-bis(indenyl)titanium complex [43]. After activation with LiAlH4 it isomerizes m 50,traw5-4-tert-butyl-l-vinyl-cyclohexane to the 5-alkene with remarkable enantioselectivity (80 % ee). 

Poly(isopropyl a-chloroacrylate) Poly(4-methoxy-2-methyl styrene) Poly(vinyl cyclohexane) Poly(cyano-p-xylylcnc)... 

Poly(vinyl cyclopentane) 565 Poly(vinyl cyclohexane) 575 to 656... 

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