Anionic polymerization of tolane and of diphenylbutadi-yne

Misin, V. M.; Kisilitsa, P. P.; Bolondayeva, N.I.; Cherkashin, Μ. I.

doi:10.1016/0032-3950(76)90379-8

Cited by 7 publications

(7 citation statements)

References 12 publications

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“…Also in the cases of phenylacetylene 11 and /1-naphthylacetylene, 12 the two types of polymers obtained with WC1 6 and MoCl 5 have shown different IR spectra; this has been explained in terms of geometric structure. Therefore.…”

Section: Structure Of Poly( Dpa)mentioning

confidence: 99%

“…The WCl 6 · Ph 4 Sn catalyst was prepared by mixing equimolar amounts of WC1 6 and Ph4 Sn in a solvent and then keeping the mixture for 15 min at 60°C. Polymerization by the MoCl 5 · EtOH · 2Et 3 Al catalyst was performed as follows: Equimolar amounts of MoC15 and ethanol were mixed in a solvent in advance.…”

Section: Experiments Almentioning

confidence: 99%

“…Acetylenic monomers, however, do not form high polymers by conventional radical, cationic, or anionic polymerization.1 Only a few transition-metal catalysts are known to polymerize acetylenes to give high polymers: for example, Ti(OC 4 H9 ) 4 -4(C2 H5hAI for acetylene,2 Fe (III) acetylacetonate-3(iso-C 4 H9 ) 3 Al for alkylacetylenes, 3 and WC1 6 and MoC15 for phenylacetylene. 4 It is anticipated that disubstituted acetylenes are generally less reactive than unsubstituted and monosubstituted acetylenes, owing to steric effects.…”

mentioning

confidence: 99%

“…The polymerization of diphenylacetylene (DPA) has been attempted so far by thermal 5 and anionic 6 initiations. In the thermal polymerization, however, only an oligomer (DP< 7) has been obtained, even though high temperatures up to 300-400°C have been employed.…”

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confidence: 99%

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Polymerization of Phenylacetylenes. X. Polymerization of Diphenylacetylene by WCl6- and MoCl5-Based Catalysts

Masuda

Kawai

Ohtori

et al. 1979

Polym J

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ABSTRACT:The polymerization of diphenylacetylene was investigated. The reaction was performed at 0-90°C in aromatic and halogenated hydrocarbons. The catalysts used are a mixture ofWCl 6 and tetraphenyltin (W catalyst) and a mixture ofMoCl 5 , ethanol, and triethylaluminum (Mo catalyst). Polymerization smoothly proceeded by the W catalyst to give yellow insoluble poly-(diphenylacetylene) in high yield. The Mo catalyst also provided poly(diphenylacetylene), which is dark red and insoluble. The IR spectroscopy, differential thermal analysis, and X-ray diffraction showed that the former polymer was rich in trans structure and amorphous, and the latter rich in cis structure and crystalline. The electric conductivity and paramagnetic property of the polymer are also described.

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Section: Structure Of Poly( Dpa)mentioning

confidence: 99%

Section: Experiments Almentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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Polymerization of Phenylacetylenes. X. Polymerization of Diphenylacetylene by WCl6- and MoCl5-Based Catalysts

Masuda

Kawai

Ohtori

et al. 1979

Polym J

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“…1 The polymerization of disubstituted acetylenes, however, remains appreciably difficult, and virtually restricted to the following cases: hexafiuoro-2-butyne (anionic catalyst; insoluble polymer), 2 dicyanoacetylene (anionic catalysts; polymer molecular weight, MW 500), 3 1-phenylpropyne (WCI 6 · Ph 4 Sn; polymer MW 6000), 4 diphenylacetylene (anionic catalysts; polymer MW 1800) 5 (WCI 6 · Ph 4 Sn; insoluble polymer), 6 1-chloro-2-phenylacetylene (Mo(COkhv; polymer MW 4 x 10 5 ), 7 and dialkylacetylenes8 -lo (vide infra).…”

mentioning

confidence: 99%