Cooligomerization of Sulfur Dioxide with Octene-1

Furukawa, Junji; Kobayashi, Eiichi

doi:10.1295/polymj.3.322

Cited by 5 publications

(2 citation statements)

References 22 publications

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“…Polarized IR spectra of elongated films of alternating butadiene-methyl methacrylate polymer showed a strong dichroism. No dichroism was observed for random copolymers which showed poor stretching properties (126).…”

Section: Gas Chromatographymentioning

confidence: 95%

Analysis of high polymers

Cobler¹,

Chow²

1977

Anal. Chem.

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Section: Gas Chromatographymentioning

confidence: 95%

Analysis of high polymers

Cobler¹,

Chow²

1977

Anal. Chem.

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“…In a coordinated anionic mechanism23 lithium is coordinated with the carbonyl group of the last and penultimate monomer units of the propagating chain. 24 In this work we assumed an additional coordination center for copper that allows the isotactaic addition of monomers to be more prominent than when other organolithium catalysts are used. In a polar solvent such as THF, on the other hand, the propagating chain end has a free ionic character and the syndiotactic configuration, which has a lower energy barrier than the isotactaic configurat i~n ,~~ is more favorable.…”

Section: Tacticity Of Polymersmentioning

confidence: 99%

Vinyl polymerization by lithium organocuprates

Han

Park

Choi

1982

J. Polym. Sci. Polym. Chem. Ed.

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Vinyl polymerizations initiated by lithium organocuprates under several conditions were investigated. It was observed that this catalyst was effective in the polymerization of specific monomers such as α,β‐unsaturated nitrile and carbonyl analogues. The rate of polymerization was rapid but retarded by the addition of pyridine, nitrobenzene, or hydroquinone. Polymerization of methyl methacrylate (MMA) with lithium di‐n‐butylcuprate as initiator produces predominantly isotactic poly(methyl methacrylate) (PMMA) in toluene. The overall activation energy was estimated as 3.5 kcal/mol deg. Lithium di‐n‐butylcuprate exerts a higher stereoregulating effect on the addition of monomers than other organolithium initiators. It is proposed that polymerization proceeds via a coordinated anionic mechanism.

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Terpolymerization of sulfur dioxide or maleic anhydride with unsaturated compounds under ultraviolet irradiation

Furukawa

Kobayashi

Nakamura

1974

J. Polym. Sci. Polym. Chem. Ed.

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The effect of ultraviolet irradiation on the terpolymerization was investigated. In the terpolymerizations of sulfur dioxide–butene‐1–acrylonitrile, sulfur dioxide–butene‐1–n‐butyl acrylate, and maleic anhydride–allyl chloride–acrylonitrile systems, the composition of the terpolymers prepared under ultraviolet irradiation was different from those prepared in the dark. The unit content of sulfur dioxide and butene‐1 or of maleic anhydride and allyl chloride in the terpolymer increased under ultraviolet irradiation. The nature of the growing end under ultraviolet irradiation is supposed to be the same as that of the dark polymerization on the basis of the same solvent effect on the terpolymer composition, the rate of polymerization and the molecular weight of polymer. The experimental results suggest that the complex between sulfur dioxide and butene‐1 or maleic anhydride and allyl chloride might be excited by ultraviolet light and the excited complex may participate in the terpolymerization.

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Cooligomerization of Sulfur Dioxide with Octene-1

Cited by 5 publications

References 22 publications

Analysis of high polymers

Analysis of high polymers

Vinyl polymerization by lithium organocuprates

Terpolymerization of sulfur dioxide or maleic anhydride with unsaturated compounds under ultraviolet irradiation

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