Mechanism of alternating copolymerization of sulphur dioxide with donor monomers

Stoyachenko, I.L.; Shklyarova, Ye.I.; Kaplan, A.M.; Голубев, В. Б.; Zubov, V.P.; Kabanov, V.Ya.

doi:10.1016/0032-3950(76)90367-1

Cited by 9 publications

(3 citation statements)

References 10 publications

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“…A similar mechanism has been put forward by others, 30 based on ESR spectroscopy data for the complex-radical copolymerization of sulfur dioxide and butadiene.…”

Section: Resultssupporting

confidence: 56%

Tricarbonylchromium complexes of styrenes in radical copolymerization

Гришин

Semyonycheva

Illichev

et al. 2001

Applied Organom Chemis

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The organometallic monomers styrenetricarbonylchromium and p-methylstyrenetricarbonylchromium were copolymerized in ethyl acetate solutions with methyl methacrylate and butyl acrylate using azobisisobutyronitrile at 50°C and a binary system including di-tert-butylperoxytriphenylantimony at 30°C as the freeradical initiators. Comonomers are proposed to form a molecular complex based on the results of ultraviolet and electron spin resonance spectroscopy. A kinetic study shows that chromiumcontaining monomers at high concentrations in the mixture reduce the rate of copolymerization. The addition of styrenetricarbonylchromium to butyl acrylate significantly slows down the autoacceleration. The reactivity ratios of the comonomer pairs, namely, styrenetricarbonylchromium-methyl methacrylate, styrenetricarbonylchromium-butyl acrylate and p-methylstyrenetricarbonylchromium-methyl methacrylate, were determined using the method of Kelen-Tudos for low conversion polymerizations.

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“…A similar mechanism has been put forward by others, 30 based on ESR spectroscopy data for the complex-radical copolymerization of sulfur dioxide and butadiene.…”

Section: Resultssupporting

confidence: 56%

Tricarbonylchromium complexes of styrenes in radical copolymerization

Гришин

Semyonycheva

Illichev

et al. 2001

Applied Organom Chemis

View full text Add to dashboard Cite

show abstract

“…The weak intensities show that the above structures are infrequent, so it is quite unlikely that their pseudoasymmetric centers will be adjacent and present different tacticities. Note however that cts-l,4-M units are sufficiently numerous in sample 8 that their resonances show directional dyad splitting. For example, the peaks at 32.81 and 32.09 ppm are due to Ci(l,4-cis-l,4-MM) and C1(4,l-czs-l,4-MAf), respectively.…”

Section: Methodsmentioning

confidence: 99%

“…However, it is still debatable whether this structure results exclusively from cross-propagation steps involving discrete monomer molecules (the Lewis-Mayo model with = r2 = 0) or "homopolymerization" of a 1:1 molecular association complex between unsaturated hydrocarbon (donor) and sulfur dioxide (acceptor). 8 Additional insight into propagation step mechanisms can be gained from variable composition polysulfones by observing the effect of copolymerization parameters on monomer sequence distibutions. Chloroprene is especially interesting in this regard because of its potential for structural isomerism not inherent in vinyl comonomers.…”

mentioning

confidence: 99%