Living polymerization of 4-methyl-2-pentyne and 1-trimethylsilyl-1-propyne initiated by NbCl5-Ph4Sn catalyst

Sultanov, E. Yu.; Gorshkova, M. Yu.; Semenistaya, E. N.; Khotimsky, V. S.

doi:10.1134/s1560090408110079

Cited by 5 publications

(4 citation statements)

References 16 publications

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“…Living nature of polymerization of TMSP as well as MP by catalysts NbCl 5 –Ph 4 Sn and NbCl 5 –Ph 3 SiH allows synthesis of AB- and BA-type PTMSP- b -PMP block copolymers by the sequential polymerization method.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, we showed that polymerization of TMSP and MP by the catalytic system NbCl 5 –Ph 4 Sn in cyclohexane has principal evidence of living polymerization, namely, continuation of chain propagation after addition of a new portion of the monomer, linear dependence of number-average molecular weight ( M n ) on monomer conversion, and unimodal molecular weight distribution (MWD) for homopolymers obtained by sequential polymerization. It was found out that the continuation of chain propagation after addition of a new portion of the same monomer is observed also when the catalyst NbCl 5 –Ph 3 SiH is used during two-stage hopolymerization of TMSP or MP.…”

Section: Introductionmentioning

confidence: 99%

“…10,11 Living polymerization of several substituted acetylenes was used for synthesis of their block copolymers by the sequential copolymerization method. 12−14 Recently, we showed 15 that polymerization of TMSP and MP by the catalytic system NbCl 5 −Ph 4 Sn in cyclohexane has principal evidence of living polymerization, namely, continuation of chain propagation after addition of a new portion of the monomer, linear dependence of number-average molecular weight (M n ) on monomer conversion, and unimodal molecular weight distribution (MWD) for homopolymers obtained by sequential polymerization. It was found out 16…”

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confidence: 99%

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Synthesis, Characterization, and Properties of Poly(1-trimethylsilyl-1-propyne)-block-poly(4-methyl-2-pentyne) Block Copolymers

et al. 2012

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Poly(1-trimethylsilyl-1-propyne)-block-poly(4-methyl-2-pentyne) (PTMSP-b-PMP) block copolymers of different composition were synthesized through sequential living polymerization by catalytic systems based on niobium pentachloride with organometallic cocatalysts in cyclohexane. Mechanical, thermal, and gas transport properties of synthesized block copolymers are investigated. The morphology of PTMSP-b-PMP can be described as a two-phase supramolecular structure which includes regions with an increased level of ordering, distributed in an amorphous phase. The observed structure of block copolymers is explained by the presence of densely packed poly(4-methyl-2-pentyne) (PMP) blocks and less ordered poly(1-trimethylsilyl-1-propyne) (PTMSP) blocks. The correlation of morphology of block copolymers with gas transport parameters as well as with resistance toward organic solvents is discussed. As result of this study, novel polymeric materials based on PTMSP and PMP combining resistance toward aromatic and aliphatic hydrocarbons with high gas transport parameters are synthesized.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Synthesis, Characterization, and Properties of Poly(1-trimethylsilyl-1-propyne)-block-poly(4-methyl-2-pentyne) Block Copolymers

et al. 2012

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“…Nb catalysis has been recognized as an important method in polymer chemistry. High-valent Nb(V) complexes can catalyze polymerization of alkenes and alkynes by coordination-insertion and metathesis mechanisms. − In contrast, there have been limited examples of polymerization of alkenes and alkynes catalyzed by low-valent Nb species, despite such species being highly reactive to multiple bonds. − …”

Section: Introductionmentioning

confidence: 99%

Low-Valent Niobium Catalysis for the Polymerization of Electron-Rich Diphenylacetylenes

Nakaguchi,

Taniguchi,

Nishimura

et al. 2023

Macromolecules

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A low-valent niobium (Nb) species formed in situ from NbCl5 with PhSiH3 induces the polymerization of diphenylacetylenes having electron-donating groups to afford the corresponding poly(diphenylacetylene)s (PDPAs) with high molecular weights in good yield. An insertion ring-expansion mechanism would be involved in the polymerization and would produce cyclic PDPAs, as suggested by results of atomic force microscopy (AFM) observations and NMR analysis of the obtained polymers. The present polymerization method was applicable to the synthesis of symmetrically substituted PDPAs having chiral alkoxy pendants at para- and meta-positions, and their chiroptical properties were investigated.

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Living Polymerization of 1‐Trimethylsilyl‐1‐propyne and 4‐Methyl‐2‐pentyne by NbCl₅‐Based Catalysts

Sultanov

Khotimskiy

2010

Macromolecular Symposia

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Sequential homopolymerization of disubstituted acetylenes 1‐trimethylsilyl‐1‐propyne and 4‐methyl‐2‐pentyne by NbCl5–Ph3SiH was investigated and the main evidence of living polymerization, namely, continuation of chain propagation after addition of a new portion of monomer was observed. AB and BA type block copolymers of 1‐trimethylsilyl‐1‐propyne and 4‐methyl‐2‐pentyne were synthesized by sequential polymerization of these monomers in presence of NbCl5–based catalytic systems.

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Living polymerization of 4-methyl-2-pentyne and 1-trimethylsilyl-1-propyne initiated by NbCl5-Ph4Sn catalyst

Cited by 5 publications

References 16 publications

Synthesis, Characterization, and Properties of Poly(1-trimethylsilyl-1-propyne)-block-poly(4-methyl-2-pentyne) Block Copolymers

Synthesis, Characterization, and Properties of Poly(1-trimethylsilyl-1-propyne)-block-poly(4-methyl-2-pentyne) Block Copolymers

Low-Valent Niobium Catalysis for the Polymerization of Electron-Rich Diphenylacetylenes

Living Polymerization of 1‐Trimethylsilyl‐1‐propyne and 4‐Methyl‐2‐pentyne by NbCl₅‐Based Catalysts

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Living polymerization of 4-methyl-2-pentyne and 1-trimethylsilyl-1-propyne initiated by NbCl5-Ph4Sn catalyst

Cited by 5 publications

References 16 publications

Synthesis, Characterization, and Properties of Poly(1-trimethylsilyl-1-propyne)-block-poly(4-methyl-2-pentyne) Block Copolymers

Synthesis, Characterization, and Properties of Poly(1-trimethylsilyl-1-propyne)-block-poly(4-methyl-2-pentyne) Block Copolymers

Low-Valent Niobium Catalysis for the Polymerization of Electron-Rich Diphenylacetylenes

Living Polymerization of 1‐Trimethylsilyl‐1‐propyne and 4‐Methyl‐2‐pentyne by NbCl5‐Based Catalysts

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Living Polymerization of 1‐Trimethylsilyl‐1‐propyne and 4‐Methyl‐2‐pentyne by NbCl₅‐Based Catalysts