Mechanochemical synthesis of polyboronphenylsiloxanes

Libanov, V. V.; Капустина, А. А.; Шапкин, Н. П.; Dmitrinok, P.; Puzyr’kov, Zahar N.

doi:10.1016/j.polymer.2020.122367

Cited by 7 publications

(5 citation statements)

References 28 publications

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“…In our work, we used titanium derivatives in which bulky β-diketonate groups surrounded the atom introduced into the siloxane chain. It was assumed that the reaction would proceed according to the radical ion mechanism described in [9,10], and that the polymerization of the initial titanium complexes, described in [30], would be absent due to the exclusion of the solvent in the process of mechanochemical activation.…”

Section: Resultsmentioning

confidence: 99%

“…The method of mechanochemical activation is becoming more and more popular not only in the synthesis of inorganic and organic compounds [1][2][3][4][5][6][7][8], but also in the modification of element organic polymers [9][10][11][12][13][14]. This method has been widely used as one of the methods for modifying macromolecular compounds, as well as for processing secondary polyolefins [15] and for removing persistent organic pollutants [16].…”

Section: Introductionmentioning

confidence: 99%

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Interaction of Polyphenylsilsesquioxane with Various β-Diketonate Complexes of Titanium by Mechanochemical Activation

Libanov

Капустина

Шапкин

et al. 2023

Powders

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In the present work, we studied the interaction of polyphenylsilsesquioxane with various β-diketonate complexes of titanium by mechanochemical activation. Polyphenylsilsesquioxane, bis-(2,4-pentanedionate) titanium dichloride, bis-(1-phenyl-1,3-butanedionate) titanium dichloride, and bis-(1,3-diphenyl-1,3-propanedionate) titanium dichloride were used as starting reagents. Various chemical and physicochemical methods of analysis were used to study the synthesis products. The composition of the obtained compounds has been determined. It is shown that under conditions of mechanochemical activation, high-molecular-weight products with a Si/Ti ratio different from the specified ones are formed. In addition, under the action of mechanical stresses, the initial titanium complexes (except for acetylacetonate complex) polymerize with the formation of coordination of high-molecular-weight compounds, which are destroyed by the addition of ethyl alcohol. It has been established that with an increase in the volume of the organic ligand, titanium atoms enter the polymer siloxane chain to a lesser extent. This work is aimed at finding efficient and environmentally friendly methods for the synthesis and modification of organometallic macromolecular compounds.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interaction of Polyphenylsilsesquioxane with Various β-Diketonate Complexes of Titanium by Mechanochemical Activation

Libanov

Капустина

Шапкин

et al. 2023

Powders

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“…In our work, we used titanium derivatives in which the atom introduced into the siloxane chain was surrounded by bulky β-diketonate groups. It was assumed that the reaction would proceed according to the schemes [12,14] previously described by us, and the side processes described in work [25] would be absent due to the exclusion of the solvent in the process of mechanochemical synthesis.…”

Section: Resultsmentioning

confidence: 99%

“…2.2.1 Polyphenylsilsesquioxane (PPSSO) was synthesized as it was described previously [14]. The compound with the composition [C 6 H 5 SiO 1.5 •0.26Н 2 О] n was obtained with a yield of 94.3%.…”

Section: Synthesis Of Starting Reagentsmentioning

confidence: 99%

“…The method of mechanochemical activation is becoming more and more popular not only in the synthesis of inorganic and organic compounds [1][2][3][4][5][6][7][8], but also in the modi cation of elementorganic polymers [9][10][11][12][13][14]. It is widely used as one of the methods for modifying high molecular weight compounds, as well as for processing secondary polyole ns [15], removing persistent organic pollutants [16].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Interaction of Polyphenylsilsesquioxane With Various β-diketonate Complexes of Titanium By Mechanochemical Activation

Libanov

Капустина²,

Шапкин³

et al. 2022

Preprint

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In the present work, we studied the interaction of polyphenylsilsesquioxane with various β-diketonate complexes of titanium by mechanochemical activation. Polyphenylsilsesquioxane, bis-(2,4-pentanedionate) titanium dichloride, bis-(1-phenyl-1,3-butanedionate) titanium dichloride and bis-(1,3-diphenyl-1,3-propanedionate) titanium dichloride were used as starting reagents. Synthesis products were studied by various chemical and physicochemical methods of analysis. The composition of the obtained compounds has been determined. It is shown that under conditions of mechanochemical activation, high molecular weight products with a Si/Ti ratio different from the specified ones are formed. In addition, under the action of mechanical stresses, the initial titanium complexes (with the exception of acetylacetonate) polymerize with the formation of coordination high-molecular compounds, which are destroyed by the addition of ethyl alcohol. The work is fundamental and contributes to the understanding of the mechanisms of mechanochemical synthesis. The work is aimed at finding effective and environmentally friendly methods for the synthesis and modification of elementorganic high-molecular compounds.

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