Comb‐type methylsiloxane copolymers with diorganosilylene fragments as a lateral group

Mukbaniani, O.; Tatrishvili, Tamara; Mukbaniani, N.

doi:10.1002/app.24474

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…Nowadays, the hydride polyaddition reactions are widely used in silicon organic chemistry. Recently, they have gained importance in obtaining complex monomers 1 and investigating the mechanisms and additions to various catalyst systems such as Pt, Pd, Co, and carbonyl metals. It is important to note the specificity of various catalytic systems [2][3][4][5] .…”

Section: Introductionmentioning

confidence: 99%

Cyclic Silicon Organic Copolymers: Synthesis and Investigation. Review

Tatrishvili,

Mukbaniani

2024

ChChT

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This paper considers the synthesis and investigation of cyclic silicon-organic polymers with mono- and polycyclic fragments in the side chain. For obtaining monocyclic polymers, the hydrosilylation reaction of 1-hydro-3-vinylhexamethylcyclotetrasiloxane was used. The reaction was conducted in a CCl4 solution at 75°C in the presence of Speier’s catalyst (H2PtCl6  6H2O) to produce a viscous-flow at room temperature polymer. The polymers were studied by NMR spectroscopy. Poly(carbosiloxane) with cyclic fragments in the methyl-siloxane backbone was synthesized by the hydride polyaddition of divinylorganocyclosiloxane with dihydrodimethylsiloxane. A semi-quantitative assessment conducted using NMR spectroscopy revealed the ratio of isomeric 1,3- and 1,5-cyclic structures as 1:1. X-ray diffraction studies indicated that copolymers are single-phase amorphous systems. Also, in the review, synthesis and studies of carbosiloxane copolymers containing flexible dimethylsiloxane and decaorganotricyclodecasiloxane fragments in the backbone are discussed. Hydride polyaddition of divinyl-containing compounds was carried out for -dihydridedimethylsiloxanes of various lengths. The synthesized copolymers were characterized by the X-ray diffraction method and TGA.

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Section: Introductionmentioning

confidence: 99%

Cyclic Silicon Organic Copolymers: Synthesis and Investigation. Review

Tatrishvili,

Mukbaniani

2024

ChChT

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“…A wide range of variation of these substituent groups is possible. Some siliconorganic copolymers contain donor groups and exhibit complexing properties …”

Section: Introductionmentioning

confidence: 99%

Siloxane Oligomers with Epoxy Pendant Groups

Mukbaniani¹,

Aneli²,

Esartia

et al. 2013

Macromolecular Symposia

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Summary: Hydrosilylation reaction of 2.4.6.8-tetrahydro-2.4.6.8-tetramethylcyclotetrasiloxane with allyl glycidyl ether at 1:4.1 molar ratios of initial compounds in the presence of platinum hydrochloric acid (0.1 M solution in THF), Karstedt's catalyst (Pt 2 [(VinSiMe 2 ) 2 O] 3 ) and platinum on the carbon have been studied and 2.4.6.8-tetrapropyl glycidyl-2.4.6.8-tetramethylcyclotetrasiloxane has been obtained. For hydrosilylation reaction order, rate constants and activation energy have been determined in the presence of Karstedt's catalyst. Ring-opening polymerization reaction of D 4 R in the presence of catalytic amount of powder-like potassium hydroxide has been carried out. Linear methylsiloxane oligomer with regular arrangement of propyl glycidyl groups in the side chain has been obtained. The reaction of epoxy group containing compounds with primary and secondary amines has been carried out and corresponding amino hydroxyl groups containing compounds have been obtained. The synthesized organosiloxanes were studied by FTIR, 1 H, 13C and 29 Si NMR spectroscopies. Comb-type oligomers were characterized by sizeexclusion chromatography, wide-angle X-ray methods. Via sol-gel processes of 2.4.6.8-tetrapropyl glycidyl-2.4.6.8-tetramethylcycltetrasiloxane, ethylene diamine and tetraethoxysilane doped with lithium trifluoromethylsulfonate (triflate) or lithium bis(trifluoromethylsulfonyl)imide solid polymer electrolyte membranes have been obtained. The dependence of ionic conductivity as a function of temperature and salt concentration has been studied. It is shown that the conductivity of membrane containing 15 wt % of triflate type salt concentration is higher on the 3 orders than analogous containing the same amount of the salt lithium bis(trifluoromethylsulfonyl)imide. The difference is described in terms of ion mobilities in the polymer matrix.

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“…A wide range of variation of these substituent groups is possible. Some organosilicon copolymers contain donor groups and exhibit complexing properties [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of cross-linked comb-type polysiloxane for polymer electrolyte membranes

et al. 2012

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Hydrosilylation reaction of 2.4.6.8-tetrahydro-2.4.6.8-tetramethylcyclotetrasiloxane with allyl acetoacetate and vinyltriethoxysilane at 1:3:1 ratio of initial compounds in the presence of Karstedt's catalyst (Pt 2 [(VinSiMe 2 ) 2 O] 3 ), platinum hydrochloric acid (0.1 M solution in THF) and platinum on the carbon have been studied and D 4 R,R' type methylorganocyclotetrasiloxane has been obtained. Ring-opening co-polymerization reactions of methylorganocyclotetrasiloxane and hexamethyldisiloxane, in the presence of catalytic amount of powder-like potassium hydroxide, have been carried out and linear methylsiloxane oligomer with regular arrangement of propyl acetoacetate and triethoxysilane groups in the side chain has been obtained. The synthesized methylorganocyclotetrasiloxane and oligomers were studied by FTIR, 1 H, 13 C, 29 Si NMR spectroscopy. Comb-type oligomers were characterized by gel-permeation chromatography, wide-angle X-ray and differential scanning calorimetric methods. Via sol-gel processes of doped with lithium trifluoromethylsulfonate (triflate) or lithium bis-(trifluoromethylsulfonyl)imide oligomer systems solid polymer electrolyte membranes have been obtained. The dependence of ionic conductivity as a function of temperature and salt concentration has been studied. The electrical conductivity of these materials at room temperature belongs to the range of 7x10 -8 to 4x10 -6 S cm -1 and depends on the structures of grafted anion receptors and the polymer backbones.

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Comb‐type methylsiloxane copolymers with diorganosilylene fragments as a lateral group

Cited by 3 publications

References 12 publications

Cyclic Silicon Organic Copolymers: Synthesis and Investigation. Review

Cyclic Silicon Organic Copolymers: Synthesis and Investigation. Review

Siloxane Oligomers with Epoxy Pendant Groups

Synthesis of cross-linked comb-type polysiloxane for polymer electrolyte membranes

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