Kinetics of intercalation of tetraalkylammonium ions into polyacetylene

Ignatious, Françis; François, B.; Mathis, C.

doi:10.1016/0032-3861(90)90259-2

Cited by 2 publications

(6 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They were made in a similar manner (see scheme 1). 4-Vinylphenyldiphenylbismuth (I) and 4isopropenylphenyldiphenylbismuth (11) were obtained as viscous oils (14). HPLC (C18-bonded silica gel and acetonitrile as eluent) revealed both monomers to be mixtures of at least three products (see discussion).…”

Section: Methodsmentioning

confidence: 99%

“…Although the Ph,BiCl precursor is pure, its reaction with the Grignard of 4bromostyrene yields an oil composed of three main products (reverse phase HPLC): 31% Ph,Bi, 42% monomer I and 20% distyrylphenylbismuth (14). A small amount (-3%) tristyrylbismuth was detected.…”

Section: Scheme Imentioning

confidence: 99%

“…Tg values correspond to the inflection point of DSC scans. Radiopacities were measured with a Picker X-ray unit operating at 90 KV and 6 mA, and compared with analuminiun stepwedge (14). Thermal stabilities were measured using a Mettler TGA at a heating rate of 20"C/min under a flow of nitrogen.…”

Section: Polymerizutionmentioning

confidence: 99%

“…Work is in progress to obtain the two bismuth monomers in pure form. The tris (4-isopropenylphenyl) bismuth can be isolated as a pure crystalline product, mp 124°C (14).…”

Section: Scheme Imentioning

confidence: 99%

“…However, it nevertheless would be desirable to eliminate any chance for the X-ray contrast additive to leach into the surrounding fluid. For that reason we have recently explored (13,14) the use of heavy atom-containing monomers that can be permanently incorporated into a polymeric matrix through copolymerization with other monomers. This procedure would result in X-ray contrast polymeric materials with covalently bound heavy atoms and prevent their diffusion out of the polymer.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Anionic polymerization of arylbismuth, lead and tin derivatives of styrene and α‐methylstyrene

Ignatious

Delaviz

Cabasso

et al. 1992

Makromolekulare Chemie. Macromolecular Symposia

Self Cite

View full text Add to dashboard Cite

Styryl‐ and α‐methylstyryldiphenylbismuth (I and II, respectively), and styryl and α‐methylstyryltriphenyllead and the two corresponding tin‐containing monomers (III, IV, V and VI, respectively) were synthesized. Compounds III through VI were obtained pure, but I and II contain substantial quantities of Ph3Bi and di‐ and tri‐vinyl derivatives. Homopolymers of I, III and V, as well as copolymers with methyl acrylate were synthesized radically. Monomers III, V, and VI yielded narrow MWD polymers with anionic initiators such as the potassium salt of the α‐methylstyrene dimer carbanion in THF at −80°C, while I gave a broad, bimodal MWD. Monomers II and IV did not polymerize under these conditions due to side reactions with the initiator. Glass transition temperatures, thermal stabilities and radiopacities of a number of the polymers were determined.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Scheme Imentioning

confidence: 99%

Section: Polymerizutionmentioning

confidence: 99%

“…Work is in progress to obtain the two bismuth monomers in pure form. The tris (4-isopropenylphenyl) bismuth can be isolated as a pure crystalline product, mp 124°C (14).…”

Section: Scheme Imentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations