Synthesis of Strictly Alternating Siloxane Copolymers and Cyclics

Nguyen, Kim-Anh Thi; Clarke, Stephen; Matisons, Janis G.; Skelton, Brian W.; White, Allan H.; Markovic, Elda

doi:10.1007/s12633-013-9148-0

Cited by 8 publications

(15 citation statements)

References 20 publications

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“…The first synthesis of 1,5-di-(ethylphenyl)-1,5-dimethyl-3,3,7,7-tetraphenylcyclotetrasiloxane [37] was reported using an ew "One Pot" procedure ar ecently reported for the preparation of new strictly alternating cyclic silicone monomers. The reaction for this reaction is shown in Scheme 8.…”

Section: Silicone Polymer Researchmentioning

confidence: 99%

“…Therefore, some outstanding work was conducted to produce, for the first time, as eries of new anhydrous dimethyl and diphenylsilanediolates (R 2 Si(OM) 2 ), where R = Me or Ph, and M = Li, Na and Kw ere synthesised by the reactionb etween dimethyl and diphenylsilanediola nd am etal or metal hydride (M/MH where M = Li, Na andK ). The anhydrous silanediolates were characterisedb y 29 Si, 13 Ca nd 1 HNMR,F TIR and mass spectroscopy.…”

Section: Silicone Polymer Researchmentioning

confidence: 99%

“…Whilst all five disilanolate monomers readily reacted to produce copolymers of equal monomer stoichiometry,t he copolymer was again not strictly alternating. 29 Si NMR was used to identify the copolymers produced were random,i nn ature, confirming the silanolate end-groups on these new anhydrous Scheme4.Thermald ecompositiono fd ipotassium dimethylsilanediolate monohydrate salt. Scheme5.Synthesis for making anhydrous dialkali organisilanolates.…”

Section: Silicone Polymer Researchmentioning

confidence: 99%

“…(4) New synthesis proceduresfor the preparation of alternating siloxane copolymersand alternating siloxane cyclic monomers An exciting "one-pot" synthetic route [29,30] was developedf or preparing 1,1,5,5-tetramethyl-3,3,7,7-tetraphenylcyclotetrasiloxane ands trictly alternating poly(dimethylsiloxanealt-diphenylsiloxane)c opolymer.T he synthetic route used the heterofunctional polycondensation of diphenylsilanediol andd ichlorodimethylsilane in the presence of triethylamine, to prepare the alternating cyclic siloxane and diethylamine, to prepare the alternating copolymer. The cyclic siloxaneproducts were characterized by single-crystal X-ray diffraction, 1 H, 13 Ca nd 29 Si NMR spectroscopy,t hermogravimetric analysis and differential scanning calorimetry,t his being expertiser esidenti nt he research teams managed by Matisons and Clarke.] [31][32][33][34][35][36] 1,5-Di-(ethylphenyl)-1,5-dimethyl-3,3,7,7-tetraphenylcyclotetrasiloxane, alternating cyclic siloxane monomer,w as also synthesised by this novel synthetic route.…”

Section: Silicone Polymer Researchmentioning

confidence: 99%

“…[31][32][33][34][35][36] 1,5-Di-(ethylphenyl)-1,5-dimethyl-3,3,7,7-tetraphenylcyclotetrasiloxane, alternating cyclic siloxane monomer,w as also synthesised by this novel synthetic route. [37] The reactions cheme to prepare the crystalline alternating cyclic siloxane monomer is shown in Scheme6,b elow: Figure 6a nd Figure 7s how 29 Si NMR and single-crystal XRD image of 1,1,5,5-tetramethyl-3,3,7,7-tetraphenylcyclotetrasiloxane.…”

Section: Silicone Polymer Researchmentioning

confidence: 99%

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Advanced Silicon Chemistry in Australia: Forming Strong Links with Asia

Clarke¹,

Nguyen

Markovic³

et al. 2017

Chemistry An Asian Journal

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This paper details Australianc ommercial and academic silicon research. Areas of interest include silicon metal, polysiloxane polymers, copolymers, cyclics, emulsions, microemulsions, silanes, silane coupling agents, sol-gel chemistry and water-treatments, porouss ilicon, polysiloxane degradation, silicon hydrogel contact lenses, silanolate synthesis, siloxanei nterfacial polymerisation, hydrosilylation, polysiloxanee lectrolytes forl ithium ion batteries, silanes for PBX materials, octafunctionalized polyhedralo ligomeric silsesquioxanes (POSS), POSS hybrids, sol-gel hydrogenation catalysts, silane modification of silica, sol-gel energy storage, silicate grout stabilisation,G eoPolymer concretes, aerogel insulatingfoams,"Phaco-Ersatz"A ccommodating Gel-Intraocular Lens technologies. Strong collaborative opportunities, in silicon, with Asia, exist with organisationss uch as:1 )The Asian Silicon Society and 2) The Agency for the Assessment and Application of Technology (BPPT) Indonesia. General OverviewHigh-cost, specialised silicon materials, including silicone polymers, have reduced in price, over the years and,i nm any instances, are now competitive in cost and application,w ith counterpart petrochemical derived, organic materials and polymers. Clarson has identified the growth of silicon options, from a2 5% increase in annual demandf or silicon used in solar panel applications,w hichh as been the drivingf orce, pushing down the cost of many silicon applications. [1] Silicon materials have been used for aw ide variety of applications,a nd Australia has played ak een role in the development of many new silicon materials. Siliconm aterials are used for aw ide variety of applications including:s olar panelsf or electricale nergy;a pplicationsi ns pecialist materials;p hotonics;e nvironmental applications;m etallurgicala pplicationsa nd surfacemodification.[2]

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Section: Silicone Polymer Researchmentioning

confidence: 99%

Section: Silicone Polymer Researchmentioning

confidence: 99%

Section: Silicone Polymer Researchmentioning

confidence: 99%

Section: Silicone Polymer Researchmentioning

confidence: 99%

Section: Silicone Polymer Researchmentioning

confidence: 99%

See 3 more Smart Citations

Advanced Silicon Chemistry in Australia: Forming Strong Links with Asia

Clarke¹,

Nguyen

Markovic³

et al. 2017

Chemistry An Asian Journal

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Siloxane‐Based Building Blocks for Molecular Technology

Saito

Sato

Yoshikawa

et al. 2019

Molecular Technology

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High‐Throughput Synthesis and Characterization of Aryl Silicones by Using the Piers–Rubinsztajn Reaction

Schneider

Brook

2019

Chemistry A European J

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Arylsilicones are widely exploited for their thermal and optical properties. The creation of phenylsilicone elastomers with specific physical properties is typically done by a “one‐off” formulation and test process. Herein, it is demonstrated that high‐throughput synthesis methods can be used to rapidly prepare a series of arylsilicone elastomers and then the relative impact of different aryl groups on their physical properties is assessed. Aromatic groups were incorporated into polydimethylsiloxane (PDMS) elastomers by exploiting the relative reactivity of different functional groups in the Piers–Rubinsztajn reaction. To analyze trends in the silicone mechanical properties as a function of increasing aryl concentration—structure/property relationships—libraries of elastomers were both quickly synthesized and characterized by using high‐throughput suites starting from low viscosity silicone oils/monomers in 96‐well plates. Liquid handling parameters were optimized to effectively work with the silicones. Incorporating aryl instead of alkyl crosslinkers into the PDMS backbone increased the silicone elastomer modulus by approximately 50 % (at a crosslink density of 6 %); elastomers prepared with an aromatic crosslinker with three contact points led to much higher moduli compared with those with one contact point at the same crosslink density. When located at precise rather than random points on the silicone chains, diphenylsilicones had lower moduli than analogous monophenylsilicones.

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Synthesis of Strictly Alternating Siloxane Copolymers and Cyclics

Cited by 8 publications

References 20 publications

Advanced Silicon Chemistry in Australia: Forming Strong Links with Asia

Advanced Silicon Chemistry in Australia: Forming Strong Links with Asia

Siloxane‐Based Building Blocks for Molecular Technology

High‐Throughput Synthesis and Characterization of Aryl Silicones by Using the Piers–Rubinsztajn Reaction

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