1
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Okamoto H, Sogabe A, Honda S. Synergetic binary organocatalyzed ring opening polymerization for the precision synthesis of polysiloxanes. Commun Chem 2024; 7:61. [PMID: 38514873 PMCID: PMC10957864 DOI: 10.1038/s42004-024-01140-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 03/05/2024] [Indexed: 03/23/2024] Open
Abstract
Organocatalytic ring-opening polymerization (ROP) is a versatile method for synthesizing well-defined polymers with controlled molecular weights, dispersities, and nonlinear macromolecular architectures. Despite spectacular advances in organocatalytic ROP, precision synthesis of polysiloxanes remains challenging due to the mismatch in polarity between highly polar initiators and nonpolar monomers and polymers and the difficulty in suppressing the formation of scrambling products via transetherification reactions during ROP of cyclic siloxanes. Here, we describe a binary organocatalytic ROP (BOROP) of hexamethylcyclotrisiloxane (D3) employing organic bases as catalysts and (thio)ureas as cocatalysts. The BOROP of D3 using triazabicyclodecene (TBD) and (thio)ureas generates polydimethylsiloxanes (PDMSs) with narrow dispersity (Mw/Mn < 1.1). Despite the similar basicities of TBD and 1,8-bis(tetramethylguanidino)naphthalene (TMGN), which is known as a proton sponge, a unitary organocatalytic system using TMGN was inactive for the ROP of D3. When the TMGN was paired with acidic urea, the BOROP of D3 yielded PDMSs with narrow dispersity (Mw/Mn < 1.1). Data suggest that the synergetic effect of TMGN and urea is results in an unprecedented activation-deactivation equilibrium between dormant and propagating species. The benefits of the present BOROP system are demonstrated by the formation of PDMS elastomers with more uniform network structures that are highly stretchy and have excellent mechanical properties.
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Affiliation(s)
- Hiroshi Okamoto
- MIRAI Technology Institute, Shiseido Co. Ltd, 1-2-11 Takashima, Nishi-ku, Yokohama, Kanagawa, 220-0011, Japan
| | - Atsushi Sogabe
- MIRAI Technology Institute, Shiseido Co. Ltd, 1-2-11 Takashima, Nishi-ku, Yokohama, Kanagawa, 220-0011, Japan
| | - Satoshi Honda
- Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo, 153-8902, Japan.
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2
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Khmelnitskaia AG, Kalinina AA, Meshkov IB, Tukhvatshin RS, Cherkaev GV, Ponomarenko SA, Muzafarov AM. Synthesis of Vinyl-Containing Polydimethylsiloxane in An Active Medium. Polymers (Basel) 2024; 16:257. [PMID: 38257056 PMCID: PMC10819907 DOI: 10.3390/polym16020257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 01/04/2024] [Accepted: 01/12/2024] [Indexed: 01/24/2024] Open
Abstract
This research deals with the synthesis of copoly(methylvinyl)(dimethyl)siloxanes by the copolycondensation of dimethyldiethoxy- and methylvinyldimethoxysilane in an active medium, followed by thermal condensation in a vacuum. We achieved a range of copolymers exhibiting finely tuned molecular weights spanning between 1500 and 20,000 with regulated functional methylvinylsiloxane units. Analysis of the microstructure showed that the copolymerization predominantly formed products demonstrating a random distribution of units (R~1). However, an increase in the content of vinyl-containing monomers increases the R parameter, indicating an enhanced tendency towards alternating linkages within the copolymer matrix.
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Affiliation(s)
| | - Aleksandra A. Kalinina
- Enikolopov Institute of Synthetic Polymeric Materials of Russian Academy of Sciences (ISPM RAS), Profsoyuznaya 70, 117393 Moscow, Russia; (A.G.K.); (I.B.M.); (S.A.P.); (A.M.M.)
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3
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Okayama Y, Eom T, Czuczola M, Abdilla A, Blankenship JR, Albanese KR, de Alaniz JR, Bates CM, Hawker CJ. Heterotelechelic Silicones: Facile Synthesis and Functionalization Using Silane-Based Initiators. Macromolecules 2023; 56:8806-8812. [PMID: 38024157 PMCID: PMC10653272 DOI: 10.1021/acs.macromol.3c01802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/09/2023] [Accepted: 10/16/2023] [Indexed: 12/01/2023]
Abstract
The synthetic utility of heterotelechelic polydimethylsiloxane (PDMS) derivatives is limited due to challenges in preparing materials with high chain-end fidelity. In this study, anionic ring-opening polymerization (AROP) of hexamethylcyclotrisiloxane (D3) monomers using a specifically designed silyl hydride (Si-H)-based initiator provides a versatile approach toward a library of heterotelechelic PDMS polymers. A novel initiator, where the Si-H terminal group is connected to a C atom (H-Si-C) and not an O atom (H-Si-O) as in traditional systems, suppresses intermolecular transfer of the Si-H group, leading to heterotelechelic PDMS derivatives with a high degree of control over chain ends. In situ termination of the D3 propagating chain end with commercially available chlorosilanes (alkyl chlorides, methacrylates, and norbornenes) yields an array of chain-end-functionalized PDMS derivatives. This diversity can be further increased by hydrosilylation with functionalized alkenes (alcohols, esters, and epoxides) to generate a library of heterotelechelic PDMS polymers. Due to the living nature of ring-opening polymerization and efficient initiation, narrow-dispersity (Đ < 1.2) polymers spanning a wide range of molar masses (2-11 kg mol-1) were synthesized. With facile access to α-Si-H and ω-norbornene functionalized PDMS macromonomers (H-PDMS-Nb), the synthesis of well-defined supersoft (G' = 30 kPa) PDMS bottlebrush networks, which are difficult to prepare using established strategies, was demonstrated.
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Affiliation(s)
- Yoichi Okayama
- Materials
Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Taejun Eom
- Materials
Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Michael Czuczola
- Department
of Chemistry & Biochemistry, University
of California, Santa Barbara, California 93106, United States
| | - Allison Abdilla
- Department
of Chemistry & Biochemistry, University
of California, Santa Barbara, California 93106, United States
| | - Jacob R. Blankenship
- Materials
Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Department
of Chemistry & Biochemistry, University
of California, Santa Barbara, California 93106, United States
| | - Kaitlin R. Albanese
- Materials
Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Department
of Chemistry & Biochemistry, University
of California, Santa Barbara, California 93106, United States
| | - Javier Read de Alaniz
- Department
of Chemistry & Biochemistry, University
of California, Santa Barbara, California 93106, United States
| | - Christopher M. Bates
- Materials
Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Department
of Chemistry & Biochemistry, University
of California, Santa Barbara, California 93106, United States
- Materials
Department, University of California, Santa Barbara, California 93106, United States
- Department
of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Craig J. Hawker
- Materials
Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Department
of Chemistry & Biochemistry, University
of California, Santa Barbara, California 93106, United States
- Materials
Department, University of California, Santa Barbara, California 93106, United States
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4
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Optimization and Characterization of the F-LSR Manufacturing Process Using Quaternary Ammonium Silanolate as an Initiator for Synthesizing Fluorosilicone. Polymers (Basel) 2022; 14:polym14245502. [PMID: 36559868 PMCID: PMC9784997 DOI: 10.3390/polym14245502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 12/04/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
Due to the growing demand for versatile hybrid materials that can withstand harsh conditions (below -40 °C), fluorosilicone copolymers are becoming promising materials that can overcome the limited operating temperature of conventional rubber. In order to synthesize a fluorosilicone copolymer, a potent initiator capable of simultaneously initiating various siloxane monomers in anionic ring-opening polymerization (AROP) is required. In this study, tetramethyl ammonium silanolate (TMAS), a quaternary ammonium (QA) anion, was employed as an initiator for AROP, thereby fluoro-methyl-vinyl-silicone (FVMQ) and fluoro-hydrido-methyl-silicone (FHMQ) were successfully synthesized under optimized conditions. FT-IR, NMR, and GPC analyses confirmed that the chain length and functional group content of FVMQ and FHMQ are controlled by changing the ratio of the components. Moreover, fluorine-involved liquid silicone rubber (F-LSR) was prepared with FVMQ as the main chain and FHMQ as a crosslinker. The tensile strength, elongation, and hardness of each F-LSR sample were measured. Finally, it was confirmed through TGA, DSC, TR-test, and embrittlement testing that elastic retention at low temperatures improved even though the heat resistance slightly decreased as the trifluoropropyl group increased in F-LSR. We anticipate that the optimization of fluorosilicone synthesis initiated by QA and the comprehensive characterization of F-LSRs with different fluorine content and chain lengths will be pivotal to academia and industry.
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5
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Bezlepkina KA, Milenin SA, Vasilenko NG, Muzafarov AM. 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. Polymers (Basel) 2022; 14:polym14122408. [PMID: 35745987 PMCID: PMC9229176 DOI: 10.3390/polym14122408] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/07/2022] [Accepted: 06/10/2022] [Indexed: 01/01/2023] Open
Abstract
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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6
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Wuchte L, DiPasquale S, Masterson A, Vance A, Goff J, Arkles B, Sulaiman S, Byrne M. Characterization and analysis of extended-wear silicone hydrogel contact lenses utilizing novel silicone macromers. J Biomed Mater Res A 2022; 110:1512-1523. [PMID: 35366061 PMCID: PMC9325505 DOI: 10.1002/jbm.a.37389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 03/16/2022] [Accepted: 03/21/2022] [Indexed: 11/09/2022]
Abstract
Contact lenses are one of the most successful biomaterials in history with a global market estimated to be worth over $17 billion in 2025. Silicone hydrogel contact lenses dominate the market and are complex biphasic biomaterials with several critical material properties needed for clinical use. Careful consideration of composition and chemistry is needed to identify formulations of lenses meeting all commercial standards with the potential for improved manufacturability, cost, and/or next generation use. Four silicone macromers were investigated in this work with varying symmetry of siloxane units and macromer structure, number of siloxane groups, branching, length, and concentration. Novel silicone hydrogel lenses were produced and evaluated for optical transmittance, elastic modulus, oxygen transmissibility, water content, and surface wettability. Several lenses met commercial standards and demonstrated an increase in oxygen permeability (Dk) and inverse relationship with elastic modulus and siloxane concentration, respectively. A hydrophobic/hydrophilic ratio below 1.4 was needed for a co‐continuous water phase. Substitution of methoxypropyl groups for butyl groups increased hydrophobic microdomains leading to decreased optical quality and mechanical properties. Generally, fluorine‐containing silicone macromers allowed for a wider range of successful compositions, and above a certain hydrophilic composition, the presence of trifluoropropyl groups resulted in improved solubility and optically clear lenses. Data also showed asymmetric siloxane macromers have potential to meet critical lens properties at lower overall siloxane content. New lens materials with wider composition ranges meeting all clinical lens properties is a significant challenge and may significantly expand the field.
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Affiliation(s)
- Liana Wuchte
- Biomimetic & Biohybrid Materials, Biomedical Devices, and Drug Delivery Laboratories, Department of Biomedical Engineering, Rowan University, Glassboro, New Jersey, USA.,Gelest, Inc., 11 East Steel Road, Morrisville, Pennsylvania, USA
| | - Stephen DiPasquale
- Biomimetic & Biohybrid Materials, Biomedical Devices, and Drug Delivery Laboratories, Department of Biomedical Engineering, Rowan University, Glassboro, New Jersey, USA.,OcuMedic, Inc., Mullica Hill, New Jersey, USA
| | - Ashlyn Masterson
- Biomimetic & Biohybrid Materials, Biomedical Devices, and Drug Delivery Laboratories, Department of Biomedical Engineering, Rowan University, Glassboro, New Jersey, USA
| | - Abigail Vance
- Biomimetic & Biohybrid Materials, Biomedical Devices, and Drug Delivery Laboratories, Department of Biomedical Engineering, Rowan University, Glassboro, New Jersey, USA
| | - Jonathan Goff
- Gelest, Inc., 11 East Steel Road, Morrisville, Pennsylvania, USA
| | - Barry Arkles
- Gelest, Inc., 11 East Steel Road, Morrisville, Pennsylvania, USA
| | - Santy Sulaiman
- Gelest, Inc., 11 East Steel Road, Morrisville, Pennsylvania, USA
| | - Mark Byrne
- Biomimetic & Biohybrid Materials, Biomedical Devices, and Drug Delivery Laboratories, Department of Biomedical Engineering, Rowan University, Glassboro, New Jersey, USA.,OcuMedic, Inc., Mullica Hill, New Jersey, USA.,Department of Chemical Engineering, Rowan University, Glassboro, New Jersey, USA
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Shi J, Liu Z, Zhao N, Liu S, Li Z. Controlled Ring-Opening Polymerization of Hexamethylcyclotrisiloxane Catalyzed by Trisphosphazene Organobase to Well-Defined Poly(dimethylsiloxane)s. Macromolecules 2022. [DOI: 10.1021/acs.macromol.1c02654] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jinfeng Shi
- Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China
| | - Zhengyang Liu
- Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China
| | - Na Zhao
- Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China
| | - Shaofeng Liu
- Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China
| | - Zhibo Li
- Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China
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8
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Talalaeva EV, Kalinina AA, Chernov EV, Khmelnitskaia AG, Obrezkova MA, Cherkaev GV, Muzafarov AM. Synthesis of 1,1,3,3,5,5-Hexamethyl-7,7-diorganocyclotetrasiloxanes and Its Copolymers. Polymers (Basel) 2021; 14:28. [PMID: 35012055 PMCID: PMC8747541 DOI: 10.3390/polym14010028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/14/2021] [Accepted: 12/20/2021] [Indexed: 12/31/2022] Open
Abstract
This paper reports a method for the synthesis of 1,1,3,3,5,5-hexamethyl-7,7-diorganocyclotetrasiloxanes by the interaction of 1,5-disodiumoxyhexamethylsiloxane with dichlorodiorganosilanes such as methyl-, methylvinyl-, methylphenyl-, diphenyl- and diethyl dichlorosilanes. Depending on the reaction conditions, the preparative yield of the target cyclotetrasiloxanes is 55-75%. Along with mixed cyclotetrasiloxanes, the proposed method leads to the formation of polymers with regular alternation of diorganosylil and dimethylsylil units. For example, in the case of dichlorodiethylsilane, 70% content of linear poly(diethyl)dimethylsiloxanes with regular alternation of units can be achieved in the reaction product. Using 7,7-diethyl-1,1,3,3,5,5-hexamethylcyclotetrasiloxane as an example, the prospects of the mixed cycle in copolymer preparation in comparison with the copolymerization of octamethyl- and octaethylcyclotetrasiloxanes are shown.
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Key Words
- 1,1,3,3,5,5,7-heptamethyl-7-phenylcyclotetrasiloxanes
- 1,1,3,3,5,5,7-heptamethyl-7-vinylcyclotetrasiloxane
- 1,1,3,3,5,5-hexamethyl-7,7-diphenylcyclotetrasiloxane
- 1,5-disodiumoxyhexamethylsiloxane
- 7,7-diethyl-1,1,3,3,5,5-hexamethylcyclotetrasiloxane
- 7-hydro-1,1,3,3,5,5,7-heptamethylcyclotetrasiloxane
- mixed cyclosiloxanes
- poly(diethyl)(dimethyl)siloxane
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Affiliation(s)
- Evgeniya V. Talalaeva
- Enikolopov Institute of Synthetic Polymeric Materials Russian Academy of Sciences (ISPM RAS), Profsoyuznaya 70, 117393 Moscow, Russia; (E.V.T.); (A.A.K.); (E.V.C.); (A.G.K.); (M.A.O.); (G.V.C.)
| | - Aleksandra A. Kalinina
- Enikolopov Institute of Synthetic Polymeric Materials Russian Academy of Sciences (ISPM RAS), Profsoyuznaya 70, 117393 Moscow, Russia; (E.V.T.); (A.A.K.); (E.V.C.); (A.G.K.); (M.A.O.); (G.V.C.)
| | - Evgeniy V. Chernov
- Enikolopov Institute of Synthetic Polymeric Materials Russian Academy of Sciences (ISPM RAS), Profsoyuznaya 70, 117393 Moscow, Russia; (E.V.T.); (A.A.K.); (E.V.C.); (A.G.K.); (M.A.O.); (G.V.C.)
| | - Alina G. Khmelnitskaia
- Enikolopov Institute of Synthetic Polymeric Materials Russian Academy of Sciences (ISPM RAS), Profsoyuznaya 70, 117393 Moscow, Russia; (E.V.T.); (A.A.K.); (E.V.C.); (A.G.K.); (M.A.O.); (G.V.C.)
| | - Marina A. Obrezkova
- Enikolopov Institute of Synthetic Polymeric Materials Russian Academy of Sciences (ISPM RAS), Profsoyuznaya 70, 117393 Moscow, Russia; (E.V.T.); (A.A.K.); (E.V.C.); (A.G.K.); (M.A.O.); (G.V.C.)
| | - Georgii V. Cherkaev
- Enikolopov Institute of Synthetic Polymeric Materials Russian Academy of Sciences (ISPM RAS), Profsoyuznaya 70, 117393 Moscow, Russia; (E.V.T.); (A.A.K.); (E.V.C.); (A.G.K.); (M.A.O.); (G.V.C.)
| | - Aziz M. Muzafarov
- Enikolopov Institute of Synthetic Polymeric Materials Russian Academy of Sciences (ISPM RAS), Profsoyuznaya 70, 117393 Moscow, Russia; (E.V.T.); (A.A.K.); (E.V.C.); (A.G.K.); (M.A.O.); (G.V.C.)
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov St., 28, 119991 Moscow, Russia
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Sato KI, Ito S, Higashihara T, Fuchise K. Precise synthesis of α,ω-chain-end functionalized poly(dimethylsiloxane) with azide groups based on metal-free ring-opening polymerization and a quantitative azidation reaction. REACT FUNCT POLYM 2021. [DOI: 10.1016/j.reactfunctpolym.2021.105009] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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10
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Cationic Polymerization of Hexamethylcyclotrisiloxane in Excess Water. Molecules 2021; 26:molecules26154402. [PMID: 34361555 PMCID: PMC8348616 DOI: 10.3390/molecules26154402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/12/2021] [Accepted: 07/16/2021] [Indexed: 12/02/2022] Open
Abstract
Ring-opening ionic polymerization of cyclosiloxanes in dispersed media has long been discovered, and is nowadays both fundamentally studied and practically used. In this short communication, we show some preliminary results on the cationic ring-opening polymerization of hexamethylcyclotrisiloxane (D3), a crystalline strained cycle, in water. Depending on the catalyst or/and surfactants used, polymers of various molar masses are prepared in a straightforward way. Emphasis is given here on experiments conducted with tris(pentafluorophenyl)borane (BCF), where high-molar polymers were generated at room temperature. In surfactant-free conditions, µm-sized droplets are stabilized by silanol end-groups of thus generated amphiphilic polymers, the latter of which precipitate in the course of reaction through chain extension. Introducing various surfactants in the recipe allows generating smaller emulsions in size with close polymerization ability, but better final colloidal stability, at the expense of low small cycles’ content. A tentative mechanism is finally proposed.
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Fuchise K, Sato K, Igarashi M. Precise Synthesis of Side-Chain-Functionalized Linear Polysiloxanes by Organocatalytic Ring-Opening Polymerization of Monofunctional Cyclotrisiloxanes. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02653] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Keita Fuchise
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Kazuhiko Sato
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Masayasu Igarashi
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
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12
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Fuchise K, Sato K, Igarashi M. Organocatalytic controlled/living ring-opening polymerization of 1,3,5-triphenyl-1,3,5-tri- p-tolylcyclotrisiloxane for the precise synthesis of fusible, soluble, functionalized, and solid poly[phenyl( p-tolyl)siloxane]s. Polym Chem 2021. [DOI: 10.1039/d1py00652e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An organocatalytic controlled/living ring-opening polymerization (ROP) of 1,3,5-triphenyl-1,3,5-tri(p-tolyl)cyclotrisiloxane (PT3) produced linear poly[phenyl(p-tolyl)siloxane] (PPTS) with controlled structures.
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Affiliation(s)
- Keita Fuchise
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Kazuhiko Sato
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Masayasu Igarashi
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
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