Industrial synthesis of reactive silicones: reaction mechanisms and processes

Köhler, Theresia Dorothee; Gutacker, Andrea; Mejía, Esteban

doi:10.1039/d0qo01075h

Cited by 45 publications

(62 citation statements)

References 72 publications

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“…Vinyl-terminated polymers showed higher thermal stability than hydroxyl-terminated polymers under nitrogen atmosphere. In a review by Köhler T. [1], the process of obtaining OH-terminated polydimethylsiloxanes by the ROP mechanism is considered in detail. US Pat.…”

Section: Obtaining Functional Telechelics By Aropmentioning

confidence: 99%

“…Polyorganosiloxanes are one of the most important classes of polymers with great practical importance. The nature of the backbone determines the set of unique characteristics of these macromolecular compounds, making them indispensable in the creation of materials widely used in various fields of practice, ranging from construction, engineering, agriculture, and environmental protection to medicine, cosmetics, pharmaceuticals, and home care products [1][2][3][4][5]. Siloxanes have low surface tension, hydrophobicity, good surface wettability, damping properties, low glass transition temperature and frost resistance, low temperature dependence of physical properties, low toxicity and flammability, and they are safe for the environment [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Ring-Opening Polymerization (ROP) and Catalytic Rearrangement as a Way to Obtain Siloxane Mono- and Telechelics, as Well as Well-Organized Branching Centers: History and Prospects

et al. 2022

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PDMS telechelics are important both in industry and in academic research. They are used both in the free state and as part of copolymers and cross-linked materials. At present, the most important, practically used, and well-studied method for the preparation of such PDMS is diorganosiloxane ring-opening polymerization (ROP) in the presence of nucleophilic or electrophilic initiators. In our brief review, we reviewed the current advances in the field of obtaining polydiorganosiloxane telechelics and monofunctional PDMS, as well as well-organized branching centers by the ROP mechanism and catalytic rearrangement, one of the first and most important reactions in the polymer chemistry of silicones, which remains so at the present time.

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Section: Obtaining Functional Telechelics By Aropmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ring-Opening Polymerization (ROP) and Catalytic Rearrangement as a Way to Obtain Siloxane Mono- and Telechelics, as Well as Well-Organized Branching Centers: History and Prospects

et al. 2022

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“…Linear polyorganosiloxanes are the academically and industrially most important siloxanes followed by cyclic diorganosiloxanes. Due to ubiquitous fields of applications, polyorganosiloxanes are nowadays the basis of a multi‐million dollar industry [4] . Polydimethylsiloxanes (PDMS), for instance, are characterized by greater stability to high temperature and UV radiation in comparison to organic polymers.…”

Section: Siloxanes: a Short Introductionmentioning

confidence: 99%

Siloxane Coordination Revisited: Si−O Bond Character, Reactivity and Magnificent Molecular Shapes

Dankert

Hänisch

2021

Eur J Inorg Chem

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Siloxanes have evolved into a multi‐million dollar business due to their manifold of commercial and industrial applications. As siloxanes have high hydrophobicity, low basicity, high flexibility and also high chemical inertness in common, their chemistry differs significantly from that of organic ethers. The discovery of organic crown ethers, for instance, is commonly accepted as the birth of synthetic host‐guest chemistry. Regarding the chemical properties of siloxanes, cyclic siloxanes which formally resemble silicon analogues of crown ethers, have received considerably less interest in terms of their host‐guest chemistry. Hence, only little is known about siloxane coordination chemistry in the chemical community and the number of published works in this field has been very low till lately. In the last few years, the field has significantly advanced and elegant methods were established to enable the Si−O−Si unit for coordination. This review therefore summarizes the recent developments in the field, recapitulates the historical aspects of siloxane coordination chemistry and describes the specific Si−O bond character with regard to different siloxane linkages. Implications on Si−O bond activation are included and the limits of siloxane coordination are redefined.

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“…Silicon-containing polymers and materials are technologically important with diverse applications including adhesives, biomedical implants, sealants, and personal care products. [1][2][3][4] In particular, polydimethylsiloxane (PDMS) is praised for its excellent biocompatibility, high gas permeability, low glass transition temperature (T g ), low surface energy, good thermal and oxidative stability, and water repellency. [5][6][7][8] Over the past decade, supramolecular silicone materials [9,10] have attracted much attention due to their outstanding properties, such as high DOI: 10.1002/macp.202100116 stiffness, high stretchability, self-healing ability, and thermoplastic capacity.…”

Section: Introductionmentioning

confidence: 99%

Reprocessable Supramolecular Elastomers of Poly(Siloxane–Urethane) via Self‐Complementary Quadruple Hydrogen Bonding

Zhou

Liu³

et al. 2021

Macro Chemistry & Physics

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Supramolecular silicone materials are promising candidates toward sustainable and recyclable applications. Herein, quadruple hydrogen bond motifs are introduced into the main chain of polysiloxane for the first time, providing a new type of supramolecular silicone elastomers. This structural design enables the well-defined spacing length between ureidopyrimidinone (UPY) units, exercising better control over polymer network structure. The obtained materials exhibit elastomeric properties and robust reprocessability, and can be further developed into europium (Eu)-coordinated elastomers with interesting water-responsive luminescence. It is highly anticipated that this work will broaden the scope and application of silicone-based sustainable materials.

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Industrial synthesis of reactive silicones: reaction mechanisms and processes

Abstract: Silicones and silicone rubbers are ubiquitous in our daily lives, being used in a broad range of applications ranging from consumer products and adhesives to medicinal and electronic devices. The...

Cited by 45 publications

References 72 publications

Ring-Opening Polymerization (ROP) and Catalytic Rearrangement as a Way to Obtain Siloxane Mono- and Telechelics, as Well as Well-Organized Branching Centers: History and Prospects

Ring-Opening Polymerization (ROP) and Catalytic Rearrangement as a Way to Obtain Siloxane Mono- and Telechelics, as Well as Well-Organized Branching Centers: History and Prospects

Siloxane Coordination Revisited: Si−O Bond Character, Reactivity and Magnificent Molecular Shapes

Reprocessable Supramolecular Elastomers of Poly(Siloxane–Urethane) via Self‐Complementary Quadruple Hydrogen Bonding

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