Anhydrous formation of foamed silicone elastomers using the Piers–Rubinsztajn reaction

Grande, John B.; Fawcett, Amanda S.; Mclaughlin, A.; Gonzaga, Ferdinand; Bender, Timothy P.; Brook, Michael A.

doi:10.1016/j.polymer.2012.05.033

Cited by 85 publications

(67 citation statements)

References 16 publications

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“…Finally all three members of the siloxane family (molecular compounds [26,127], linear [128] and 3D cross-linked [53,129,130] polysiloxanes) were successfully prepared by the Piers-Rubinsztajn reaction (or dehydrocarbon condensation) as reviewed elsewhere [25,111]. Although research into this reaction type is strongly focused on the polymer science, the first examples of the preparation of porous silica-based hybrid materials [131] and mixed Si-O-B oxides [54] have been reported.…”

Section: Siloxanes By Nhsg Condensations Piers-rubinsztajn Reactionmentioning

confidence: 99%

The Power of Non-Hydrolytic Sol-Gel Chemistry: A Review

et al. 2017

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This review is devoted to non-hydrolytic sol-gel chemistry. During the last 25 years, non-hydrolytic sol-gel (NHSG) techniques were found to be attractive and versatile methods for the preparation of oxide materials. Compared to conventional hydrolytic approaches, the NHSG route allows reaction control at the atomic scale resulting in homogeneous and well defined products. Due to these features and the ability to design specific materials, the products of NHSG reactions have been used in many fields of application. The aim of this review is to present an overview of NHSG research in recent years with an emphasis on the syntheses of mixed oxides, silicates and phosphates. The first part of the review highlights well known condensation reactions with some deeper insights into their mechanism and also presents novel condensation reactions established in NHSG chemistry in recent years. In the second section we discuss porosity control and novel compositions of selected materials. In the last part, the applications of NHSG derived materials as heterogeneous catalysts and supports, luminescent materials and electrode materials in Li-ion batteries are described.

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Section: Siloxanes By Nhsg Condensations Piers-rubinsztajn Reactionmentioning

confidence: 99%

The Power of Non-Hydrolytic Sol-Gel Chemistry: A Review

et al. 2017

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“…[63] A functional group other than chloro-and hydrosilane may also be a good candidate for the synthesis. 3D cross-linked polymers are obtained from SiÀHterminated silicone and tetraalkoxysilane.…”

Section: Synthesis Of 3d Siloxane Polymers Using Lewis Acid Catalystsmentioning

confidence: 99%

Siloxane‐Bond Formation Promoted by Lewis Acids: A Nonhydrolytic Sol–Gel Process and the Piers–Rubinsztajn Reaction

Wakabayashi

Kuroda

2013

ChemPlusChem

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Siloxane formation reactions of both the nonhydrolytic sol–gel process and Piers–Rubinsztajn reaction can be integrated as Lewis acid promoted siloxane syntheses without involving silanol groups. The former was developed in the field of inorganic materials chemistry and the latter was initiated in polymer chemistry. We have realized both reactions are quite similar, in terms of 1) the nonhydrolytic reaction, 2) the use of alkoxysilanes, 3) the group‐exchange reactions competing with the siloxane formation, and 4) the proposed reaction mechanisms. This Minireview focuses on the above two reactions. The evolution of both reactions should realize a more sophisticated molecular design of siloxane compounds, which surely contributes to the development of advanced functional materials.

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“…As a high‐performance type of material, SiFs exhibit many outstanding characteristics, including good biological compatibility, nontoxicity, antiaging, strong sound absorption, chemical stability, light weight, ozone resistance, high‐ and low‐temperature resistance, and electrical insulation . Therefore, they are widely applied in aerospace, national defense, medicine, electrical, transportation, and construction industries . However, as the abundant hydrocarbon groups on its side chain, SiFs can smolder, combust, and release choking smoke once ignited, which become a bottleneck restricting their rapid popularization and application.…”

Section: Introductionmentioning

confidence: 99%

Flame retardancy and smoke suppression of silicone foams with microcapsulated aluminum hypophosphite and zinc borate

Kang

Wang

Deng

et al. 2020

Polymers for Advanced Techs

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The flame‐retardant microcapsules were successfully fabricated with an aluminum hypophosphite (AHP) core. Fourier transform infrared (FTIR) and X‐ray photoelectron spectroscopy (XPS) were used to verify that AHP was encapsulated in the microcapsules, and thermogravimetry analysis showed that microencapsulated AHP (MAHP) possessed higher thermal stability than that of AHP. Then, a flame‐retardant and smoke suppression system for silicone foams (SiFs) was obtained through a synergistic effect of MAHP and zinc borate (2ZnO·3B2O3·3.5H2O). The mechanical properties, flame retardance, and smoke suppression of SiFs with MAHP and zinc borate were tested using the tensile test, limiting oxygen index (LOI) test, UL‐94 test, and cone calorimeter test. The mechanical properties indicated that the tensile strength and elongation at break of SiFs could evidently improve with the incorporation of MAHP. Compared with pure SiF, SiF8 with 4.5‐wt% MAHP and 1.5‐wt% zinc borate could achieve an LOI value of 30.7 vol% and an UL‐94 V‐0 rating, the time to ignition amplified almost six times, the peak heat release rate and total heat release were 51.10% and 46.00% less than that of pure SiF, respectively, the fire performance index increased nearly 13 times, and the fire growth index value was only 13.18% of pure SiF. Moreover, the partial substitution of zinc borate imparted a substantial improvement in both flame retardancy and smoke suppression. Especially, the peak smoke production rate and total smoke production of SiF8 were merely 38.46% and 38.84% of pure SiF.

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Anhydrous formation of foamed silicone elastomers using the Piers–Rubinsztajn reaction

Cited by 85 publications

References 16 publications

The Power of Non-Hydrolytic Sol-Gel Chemistry: A Review

The Power of Non-Hydrolytic Sol-Gel Chemistry: A Review

Siloxane‐Bond Formation Promoted by Lewis Acids: A Nonhydrolytic Sol–Gel Process and the Piers–Rubinsztajn Reaction

Flame retardancy and smoke suppression of silicone foams with microcapsulated aluminum hypophosphite and zinc borate

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