Anionic ring-opening polymerization of 1,1,3-trimethyl-1-silacyclopent-3-ene. Effect of temperature on poly(1,1,3-trimethyl-1-sila-cis-pent-3-ene) microstructure

Park, Young Tae; Manuel, Georges; Weber, William P.

doi:10.1021/ma00209a004

Cited by 19 publications

(4 citation statements)

References 2 publications

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“…Polymers possessing an alternating arrangement of a π‐conjugated unit 83 such as phenylene, 84 ethenylene, 85–87 and a sil(an)ylene unit in the backbone were synthesized by coupling reactions, 86,88 thermal cyclopolymerization 89,90 and a variety of ring‐opening polymerization (ROP) reactions including anionic, 91–95 thermolytic, and catalytic coordination techniques, 96 each with some limitations.…”

Section: Preceramic Polymer Synthesismentioning

confidence: 99%

Polymer‐Derived Ceramics: 40 Years of Research and Innovation in Advanced Ceramics

Colombo

Mera

Riedel

et al. 2010

Journal of the American Ceramic Society

1,533

582

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Preceramic polymers were proposed over 30 years ago as precursors for the fabrication of mainly Si-based advanced ceramics, generally denoted as polymer-derived ceramics (PDCs). The polymer to ceramic transformation process enabled significant technological breakthroughs in ceramic science and technology, such as the development of ceramic fibers, coatings, or ceramics stable at ultrahigh temperatures (up to 20001C) with respect to decomposition, crystallization, phase separation, and creep. In recent years, several important advances have been achieved such as the discovery of a variety of functional properties associated with PDCs. Moreover, novel insights into their structure at the nanoscale level have contributed to the fundamental understanding of the various useful and unique features of PDCs related to their high chemical durability or high creep resistance or semiconducting behavior. From the processing point of view, preceramic polymers have been used as reactive binders to produce technical ceramics, they have been manipulated to allow for the formation of ordered pores in the meso-range, they have been tested for joining advanced ceramic components, and have been processed into bulk or macroporous components. Consequently, possible fields of applications of PDCs have been extended significantly by the recent research and development activities. Several key engineering fields suitable for application of PDCs include high-temperature-resistant materials (energy materials, automotive, aerospace, etc.), hard materials, chemical engineering (catalyst support, food- and biotechnology, etc.), or functional materials in electrical engineering as well as in micro/ nanoelectronics. The science and technological development of PDCs are highly interdisciplinary, at the forefront of micro- and nanoscience and technology, with expertise provided by chemists, physicists, mineralogists, and materials scientists, and engineers. Moreover, several specialized industries have already commercialized components based on PDCs, and the production and availability of the precursors used has dramatically increased over the past few years. In this feature article, we highlight the following scientific issues related to advanced PDCs research: (1) General synthesis procedures to produce silicon-based preceramic polymers. (2) Special microstructural features of PDCs. (3) Unusual materials properties of PDCs, that are related to their unique nanosized microstructure that makes preceramic polymers of great and topical interest to researchers across a wide spectrum of disciplines. (4) Processing strategies to fabricate ceramic components from preceramic polymers. (5) Discussion and presentation of several examples of possible real-life applications that take advantage of the special characteristics of preceramic polymers. Note: In the past, a wide range of specialized international symposia have been devoted to PDCs, in particular organized by the American Ceramic Society, the European Materials Society, and the Materials Research S...

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Section: Preceramic Polymer Synthesismentioning

confidence: 99%

Polymer‐Derived Ceramics: 40 Years of Research and Innovation in Advanced Ceramics

Colombo

Mera

Riedel

et al. 2010

Journal of the American Ceramic Society

1,533

582

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“…The residue was purified by fractional distillation through a 15-cm vacuum-jacketed Vigreux column. A fraction with bp 105 °C (0.8 mmHg), 1.9 g, 41% yield, was obtained: IR NMR Í 0.11 (s, 3 H), 0.61 (m, 2 ), 1.17 (t, 3 H, J = 7.0 Hz), 1.22 (m, 4H,«7= 6.1 Hz), 1.59 (m, 2 H), 3.39 (t, 2 H ,J= 7.02 Hz), 3.48 (q, 2 H, J -7.0 Hz), (3), 75 (3), 74 (5), 73 (43), 72 (10), 45 (100); high-resolution MS…”

Section: Vofmentioning

confidence: 99%

Synthesis and properties of novel comb polymers: unsaturated carbosilane polymers with pendent oligo(oxyethylene) groups

Wang¹,

Weber²

1993

Macromolecules

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l-[-Methoxyoligo(oxyethylene)propyl]-l-methyl-l-silacyclopent-3-enes have been prepared by the dissolving-metal reaction of [to-methoxyoligo(oxyethylene)propyl] methyldichlorosilane with magnesium and 1,3-butadiene or by the platinum-catalyzed hydrosilation reaction between the Si-H bond of 1-methyll-silacyclopent-3-ene and the C-C double bond of oligo(ethylene glycol) allyl methyl ether. Anionic ringopening polymerization of these monomers yields poly [l-[co-methoxyoligo(oxyethylene)propyl]-l-methyll-sila-cís-pent-3-enes]. These comb polymers have low T,s (-70 to -75 °C). Complex formation between the pendant oligo(oxyethylene) chains and lithium cations has been studied by 13C NMR and differential scanning calorimetry.

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“…In this regard, we have prepared poly(l,l-dimethyl-l-sila-cis-pent-3-ene) and related systems by the anionic ring-opening polymerization of 1,1dimethyl-l-silacyclopent-3-ene and similar 1-silacyclopent-3-enes. [13][14][15] In these polymers, the carbon-carbon double bond is an integral part of the polymer chain. The allylic relationship of the carbon-carbon double bonds to the silyl centers in these polymers makes them susceptible to acid-catalyzed degradation.…”

Section: Resultsmentioning
confidence: 99%

Synthesis and characterization of poly(1-methyl-1-vinyl-1-silabutane), poly(1-phenyl-1-vinyl-1-silabutane), and poly(1,1-divinyl-1-silabutane)
Liao¹,
Weber²
1992
Macromolecules
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Poly(l-methyl-l-vinyl-l-silabutane),poly(l-phenyl-l-vinyl-l-silabutane), andpoly(l, 1-divinyl-1-silabutane) have been prepared by anonic ring-opening polymerization, cocatalyzed by n-butyllithium and hexamethylphosphoramide (HMPA) in THF at -78 °C, of i-methyl-l-vinyl-l-silacyclobutane, 1-phenyl-lvinyl-l-silacyclobutane, and 1,1-divinyl-l-silacyclobutane, respectively. These polymers have been characterized by 1H, 13C, and 29Si NMR as well as FT-IR and UV spectroscopy. Their molecular weight distribution has been determined by gel permeation chromatography (GPC), their thermal stability by thermogravimetric analysis (TGA), and their glass transition temperatures (Tg) by differential scanning calorimetry (DSC). Thermal degradation of poly(l,l-divinyl-l-silabutane) in an inert atmosphere gives a 45% char yield.

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Anionic ring-opening polymerization of 1,1,3-trimethyl-1-silacyclopent-3-ene. Effect of temperature on poly(1,1,3-trimethyl-1-sila-cis-pent-3-ene) microstructure

Cited by 19 publications

References 2 publications

Polymer‐Derived Ceramics: 40 Years of Research and Innovation in Advanced Ceramics

Polymer‐Derived Ceramics: 40 Years of Research and Innovation in Advanced Ceramics

Synthesis and properties of novel comb polymers: unsaturated carbosilane polymers with pendent oligo(oxyethylene) groups

Synthesis and characterization of poly(1-methyl-1-vinyl-1-silabutane), poly(1-phenyl-1-vinyl-1-silabutane), and poly(1,1-divinyl-1-silabutane)

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