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Mundil R, Bravo C, Merle N, Zinck P. Coordinative Chain Transfer and Chain Shuttling Polymerization. Chem Rev 2024; 124:210-244. [PMID: 38085864 DOI: 10.1021/acs.chemrev.3c00440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
Coordinative chain transfer polymerization, CCTP, is a degenerative chain transfer polymerization process that has a wide range of applications. It allows a highly controlled synthesis of polyolefins, stereoregular polydienes, and stereoregular polystyrene, including (stereo)block as well as statistical copolymers thereof. It also shows a green character by allowing catalyst economy during the synthesis of such polymers. CCTP notably allows the end functionalization of both the commodity and stereoregular specialty polymers aforementionned, control of the composition of statistical copolymers without adjusting the feed, and quantitative formation of 1-alkenes from ethene. A one-pot one-step synthesis of the original multiblock microstructures and architectures by chain shuttling polymerization (CSP) is also an asset of CCTP. This methodology takes advantage of the simultaneous presence of two catalysts of different selectivity toward comonomers that produce blocks of different composition/microstructure, while still allowing the chain transfer. This affords the production of highly performant functional polymers, such as thermoplastic elastomers and adhesives, among others. This approach has been extended to cyclic esters' and ethers' ring-opening polymerization, providing new types of multiblock microstructure. The present Review provides the state of the art in the field with a focus on the last 10 years.
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Affiliation(s)
- Robert Mundil
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova, 2030, 128 40 Prague 2, Czech Republic
| | - Catarina Bravo
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
| | - Nicolas Merle
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
| | - Philippe Zinck
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
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Zheng N, Liu J, Li Z, Lu J, Ni Y, Min X. Synthesis of block copolymer with cis-1,4-polybutadiene and isotactic-rich polystyrene using α-diimine nickel catalysts. ROYAL SOCIETY OPEN SCIENCE 2023; 10:230791. [PMID: 37859835 PMCID: PMC10582592 DOI: 10.1098/rsos.230791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 09/12/2023] [Indexed: 10/21/2023]
Abstract
A series of styrene-butadiene di-block copolymers with high cis-1,4 unit content (greater than 92%) polybutadiene (PB) and isotactic-rich polystyrene (PS) (mmmm > 65%) was synthesized using α-diimine nickel catalysts (Ni-diimine). Four different Ni-diimine catalysts were synthesized via a complexing reaction between nickel (II) naphthenate and laboratory-made α-diimine ligands L1, L2, L3 and L4, which have different steric volume structures. The results indicate that the Ni-diimine catalyst prepared using the L4 ligand with a higher steric volume can effectively initiate the block polymerization of butadiene and styrene, and the resulting polymer has distinguished cis-1,4 structure unit PB and high isotactic-selective PS block. Differential scanning calorimetry and electrochemical performance tests show that these block copolymers with cis-1,4-regulated and isotactic-selective polymerization have advantages in terms of high-temperature and low-temperature resistance as well as corrosion resistance. Therefore, these copolymers are expected to be widely used in some harsh industrial environments.
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Affiliation(s)
- Nan Zheng
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environmental Science, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, People's Republic of China
| | - Jie Liu
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environmental Science, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, People's Republic of China
| | - Zonglin Li
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environmental Science, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, People's Republic of China
| | - Jiufu Lu
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environmental Science, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, People's Republic of China
| | - Yan Ni
- Yuzhang Normal University, Nanchang, Jiangxi 330103, People's Republic of China
| | - Xin Min
- College of Chemistry and Environmental Engineering, Jiujiang University, Jiujiang, Jiangxi 332005, People's Republic of China
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3
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Maji P, Naskar K. Styrenic block copolymer‐based thermoplastic elastomers in smart applications: Advances in synthesis, microstructure, and structure–property relationships—A review. J Appl Polym Sci 2022. [DOI: 10.1002/app.52942] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Purbasha Maji
- Rubber Technology Centre Indian Institute of Technology Kharagpur West Bengal India
| | - Kinsuk Naskar
- Rubber Technology Centre Indian Institute of Technology Kharagpur West Bengal India
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Dong S, Chen F, Wang G, Hu W, Zhao C, Hu Y, Deng S. Study on vinyl crosslinking and related properties of silicon-containing arylacetylene resin synthesised by zinc powder catalysis. HIGH PERFORM POLYM 2022. [DOI: 10.1177/09540083221079704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A matrix resin poly(silicon-containing arylacetylene vinyl)s (PSAV) containing vinyl at both branch and terminal chains underwent synthesis via the zinc powder catalytic method using m-diacetylene benzene and dichloromethylvinylsilane as raw materials. Vinyl in the PSAV resin was crosslinked by the free radical initiator dibenzoyl peroxide to obtain a crosslinked network structure resin (PSAV-L). This approach sought to improve the thermal properties and other related properties of the matrix resin. A series of tests, such as rotated rheometer, FTIR, DSC, TGA, Py-GC-MS and universal testing machine, characterised processing property, curing behaviour, thermal properties and mechanical properties. The rheological curve shows that PSAV-L resin has a wide processing window (40–134.5°C), endowing the resin with excellent processing performance. Thermal curing behaviour indicates that PSAV-L resin can start curing at a lower temperature, namely, 32°C earlier than PSAV resin. TGA analysis shows that the degradation temperature at 5% weight loss (Td5) of PSAV-L resin stands at 579.4°C, 45.4°C higher than that of PSAV resin due to the fact that the crosslinking of vinyl gives PSAV-L resin a network structure. The flexural strength, flexural modulus and ILSS of the quartz fibre cloth reinforced PSAV-L resin composite (QF/PSAV-L) are 184.68 MPa, 15.50 GPa and 12.40 MPa. The PSAV-L resin exhibits the comprehensive properties of good processing performance, low curing temperature, excellent thermal performance and high mechanical properties.
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Affiliation(s)
- Sensen Dong
- Key Laboratory of Specially Functional Polymeric Materials and Related Technology (Ministry of Education), School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
| | - Fan Chen
- Key Laboratory of Specially Functional Polymeric Materials and Related Technology (Ministry of Education), School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
| | - Guihui Wang
- Key Laboratory of Specially Functional Polymeric Materials and Related Technology (Ministry of Education), School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
| | - Wei Hu
- Key Laboratory of Specially Functional Polymeric Materials and Related Technology (Ministry of Education), School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
| | - Chuanqing Zhao
- Key Laboratory of Specially Functional Polymeric Materials and Related Technology (Ministry of Education), School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
| | - Yanhong Hu
- Key Laboratory of Specially Functional Polymeric Materials and Related Technology (Ministry of Education), School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
| | - Shifeng Deng
- Key Laboratory of Specially Functional Polymeric Materials and Related Technology (Ministry of Education), School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
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Zanchin G, Leone G. Polyolefin thermoplastic elastomers from polymerization catalysis: Advantages, pitfalls and future challenges. Prog Polym Sci 2021. [DOI: 10.1016/j.progpolymsci.2020.101342] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Abstract
A comprehensive review of all the methodologies developed for the synthesis of telechelic polyolefins is reported.
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Affiliation(s)
- Tianwei Yan
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana−Champaign, Urbana, Illinois 61801, USA
| | - Damien Guironnet
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana−Champaign, Urbana, Illinois 61801, USA
- Department of Chemistry, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, USA
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Lee JC, Park KL, Bae SM, Lee HJ, Baek JW, Lee J, Sa S, Shin EJ, Lee KS, Lee BY. Styrene Moiety-Carrying Diorganozinc Compound Preparation for Polystyrene-Poly(ethylene-co-1-hexene)-Polystyrene Triblock Copolymer Production. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01253] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jong Chul Lee
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, South Korea
| | - Kyung Lee Park
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, South Korea
| | - Sung Moon Bae
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, South Korea
| | - Hyun Ju Lee
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, South Korea
| | - Jun Won Baek
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, South Korea
| | - Junseong Lee
- Department of Chemistry, Chonnam National University, Gwangju 61186, South Korea
| | - Seokpil Sa
- LG Chem Ltd., Daejeon 34122, South Korea
| | | | - Ki Soo Lee
- LG Chem Ltd., Daejeon 34122, South Korea
| | - Bun Yeoul Lee
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, South Korea
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Park KL, Baek JW, Moon SH, Bae SM, Lee JC, Lee J, Jeong MS, Lee BY. Preparation of Pyridylamido Hafnium Complexes for Coordinative Chain Transfer Polymerization. Polymers (Basel) 2020; 12:E1100. [PMID: 32403453 PMCID: PMC7285347 DOI: 10.3390/polym12051100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 05/02/2020] [Accepted: 05/07/2020] [Indexed: 12/04/2022] Open
Abstract
The pyridylamido hafnium complex (I) discovered at Dow is a flagship catalyst among postmetallocenes, which are used in the polyolefin industry for PO-chain growth from a chain transfer agent, dialkylzinc. In the present work, with the aim to block a possible deactivation process in prototype compound I, the corresponding derivatives were prepared. A series of pyridylamido Hf complexes were prepared by replacing the 2,6-diisopropylphenylamido part in I with various 2,6-R2C6H3N-moieties (R = cycloheptyl, cyclohexyl, cyclopentyl, 3-pentyl, ethyl, or Ph) or by replacing 2-iPrC6H4C(H)- in I with the simple PhC(H)-moiety. The isopropyl substituent in the 2-iPrC6H4C(H)-moiety influences not only the geometry of the structures (revealed by X-ray crystallography), but also catalytic performance. In the complexes bearing the 2-iPrC6H4C(H)-moiety, the chelation framework forms a plane; however, this framework is distorted in the complexes containing the PhC(H)-moiety. The ability to incorporate α-olefin decreased upon replacing 2-iPrC6H4C(H)-with the PhC(H)-moiety. The complexes carrying the 2,6-di(cycloheptyl)phenylamido or 2,6-di(cyclohexyl)phenylamido moiety (replacing the 2,6-diisopropylphenylamido part in I) showed somewhat higher activity with greater longevity than did prototype catalyst I.
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Affiliation(s)
- Kyung Lee Park
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea; (K.L.P.); (J.W.B.); (S.H.M.); (S.M.B.); (J.C.L.)
| | - Jun Won Baek
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea; (K.L.P.); (J.W.B.); (S.H.M.); (S.M.B.); (J.C.L.)
| | - Seung Hyun Moon
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea; (K.L.P.); (J.W.B.); (S.H.M.); (S.M.B.); (J.C.L.)
| | - Sung Moon Bae
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea; (K.L.P.); (J.W.B.); (S.H.M.); (S.M.B.); (J.C.L.)
| | - Jong Chul Lee
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea; (K.L.P.); (J.W.B.); (S.H.M.); (S.M.B.); (J.C.L.)
| | - Junseong Lee
- Department of Chemistry, Chonnam National University, Gwangju 500-757, Korea;
| | - Myong Sun Jeong
- Intellectual Property Education Center, Anyang University, Anyang 708-113, Korea;
| | - Bun Yeoul Lee
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea; (K.L.P.); (J.W.B.); (S.H.M.); (S.M.B.); (J.C.L.)
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9
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Kim TJ, Baek JW, Moon SH, Lee HJ, Park KL, Bae SM, Lee JC, Lee PC, Lee BY. Polystyrene Chain Growth Initiated from Dialkylzinc for Synthesis of Polyolefin-Polystyrene Block Copolymers. Polymers (Basel) 2020; 12:E537. [PMID: 32131422 PMCID: PMC7182881 DOI: 10.3390/polym12030537] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Revised: 01/15/2020] [Accepted: 01/16/2020] [Indexed: 11/30/2022] Open
Abstract
Polyolefins (POs) are the most abundant polymers. However, synthesis of PO-based block copolymers has only rarely been achieved. We aimed to synthesize various PO-based block copolymers by coordinative chain transfer polymerization (CCTP) followed by anionic polymerization in one-pot via conversion of the CCTP product (polyolefinyl)2Zn to polyolefinyl-Li. The addition of 2 equiv t-BuLi to (1-octyl)2Zn (a model compound of (polyolefinyl)2Zn) and selective removal or decomposition of (tBu)2Zn by evacuation or heating at 130 °C afforded 1-octyl-Li. Attempts to convert (polyolefinyl)2Zn to polyolefinyl-Li were unsuccessful. However, polystyrene (PS) chains were efficiently grown from (polyolefinyl)2Zn; the addition of styrene monomers after treatment with t-BuLi and pentamethyldiethylenetriamine (PMDTA) in the presence of residual olefin monomers afforded PO-block-PSs. Organolithium species that might be generated in the pot of t-BuLi, PMDTA, and olefin monomers, i.e., [Me2NCH2CH2N(Me)CH2CH2N(Me)CH2Li, Me2NCH2CH2N(Me)Li·(PMDTA), pentylallyl-Li⋅(PMDTA)], as well as PhLi⋅(PMDTA), were screened as initiators to grow PS chains from (1-hexyl)2Zn, as well as from (polyolefinyl)2Zn. Pentylallyl-Li⋅(PMDTA) was the best initiator. The Mn values increased substantially after the styrene polymerization with some generation of homo-PSs (27-29%). The Mn values of the extracted homo-PS suggested that PS chains were grown mainly from polyolefinyl groups in [(polyolefinyl)2(pentylallyl)Zn]-[Li⋅(PMDTA)]+ formed by pentylallyl-Li⋅(PMDTA) acting onto (polyolefinyl)2Zn.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Bun Yeoul Lee
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea; (T.J.K.); (J.W.B.); (S.H.M.); (H.J.L.); (K.L.P.); (S.M.B.); (J.C.L.); (P.C.L.)
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10
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Abstract
Multiblock copolymers (MBCs) are an emerging class of synthetic polymers that exhibit different macromolecular architectures and behaviours to those of homopolymers or di/triblock copolymers.
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Affiliation(s)
- Valentin P. Beyer
- Department of Chemistry
- University of Warwick
- Coventry
- UK
- Polymer Chemistry Laboratory
| | - Jungyeon Kim
- Department of Chemistry
- University of Warwick
- Coventry
- UK
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11
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Lee HJ, Baek JW, Kim TJ, Park HS, Moon SH, Park KL, Bae SM, Park J, Lee BY. Synthesis of Long-Chain Branched Polyolefins by Coordinative Chain Transfer Polymerization. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01705] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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12
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Recent advances in thermoplastic elastomers from living polymerizations: Macromolecular architectures and supramolecular chemistry. Prog Polym Sci 2019. [DOI: 10.1016/j.progpolymsci.2019.04.002] [Citation(s) in RCA: 111] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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13
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Luan T, Cheng L, Cheng J, Zhang X, Cao Y, Zhang X, Cui H, Zhao G. Tailored Design of an ROS-Responsive Drug Release Platform for Enhanced Tumor Therapy via "Sequential Induced Activation Processes". ACS APPLIED MATERIALS & INTERFACES 2019; 11:25654-25663. [PMID: 31246402 DOI: 10.1021/acsami.9b01433] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The reactive oxygen species (ROS)-responsive intelligent drug delivery system has developed rapidly in recent years. However, because of the low concentration of ROS in most types of tumor cells, it is not possible to rapidly and effectively stimulate the drug delivery system to release the active drug. Here, we introduced "sequential induced activation processes" for efficient tumor therapy by designing a new ROS-responsive drug release platform. β-Lapachone, a positively charged nitrogen mustard (NM) prodrug, and two diblock molecules (mPEG-AcMH and PAsp-AcMH) are self-assembled to form prodrug primary micelles, which are further aggregated into nanoparticles that facilitate drug codelivery. When administered by intravenous injection, the nanoparticles reach the tumor site and enter the tumor cells by endocytosis. The β-lapachone released in the tumor cells induces a large amount of H2O2, and the ROS-responsive NM prodrug is activated to form activated NM, quinone methide, and boric acid under the induction of H2O2. The activated NM leads to tumor cell apoptosis.
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Preparation of Half- and Post-Metallocene Hafnium Complexes with Tetrahydroquinoline and Tetrahydrophenanthroline Frameworks for Olefin Polymerization. Polymers (Basel) 2019; 11:polym11071093. [PMID: 31252659 PMCID: PMC6680767 DOI: 10.3390/polym11071093] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 06/24/2019] [Accepted: 06/25/2019] [Indexed: 01/27/2023] Open
Abstract
Hafnium complexes have drawn attention for their application as post-metallocene catalysts with unique performance in olefin polymerization. In this work, a series of half-metallocene HfMe2 complexes, bearing a tetrahydroquinoline framework, as well as a series of [Namido,N,Caryl]HfMe2-type post-metallocene complexes, bearing a tetrahydrophenanthroline framework, were prepared; the structures of the prepared Hf complexes were unambiguously confirmed by X-ray crystallography. When the prepared complexes were reacted with anhydrous [(C18H37)2N(H)Me]+[B(C6F5)4]−, desired ion-pair complexes, in which (C18H37)2NMe coordinated to the Hf center, were cleanly afforded. The activated complexes generated from the half-metallocene complexes were inactive for the copolymerization of ethylene/propylene, while those generated from post-metallocene complexes were active. Complex bearing bulky isopropyl substituents (12) exhibited the highest activity. However, the activity was approximately half that of the prototype pyridylamido-Hf Dow catalyst. The comonomer incorporation capability was also inferior to that of the pyridylamido-Hf Dow catalyst. However, 12 performed well in the coordinative chain transfer polymerization performed in the presence of (octyl)2Zn, converting all the fed (octyl)2Zn to (polyolefinyl)2Zn with controlled lengths of the polyolefinyl chain.
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Kwon SJ, Baek JW, Lee HJ, Kim TJ, Ryu JY, Lee J, Shin EJ, Lee KS, Lee BY. Preparation of Pincer Hafnium Complexes for Olefin Polymerization. Molecules 2019; 24:E1676. [PMID: 31035708 PMCID: PMC6540127 DOI: 10.3390/molecules24091676] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 04/08/2019] [Accepted: 04/09/2019] [Indexed: 11/17/2022] Open
Abstract
Pincer-type [Cnaphthyl, Npyridine, Namido]HfMe2 complex is a flagship among the post-metallocene catalysts. In this work, various pincer-type Hf-complexes were prepared for olefin polymerization. Pincer-type [Namido, Npyridine, Namido]HfMe2 complexes were prepared by reacting in situ generated HfMe4 with the corresponding ligand precursors, and the structure of a complex bearing 2,6-Et2C6H3Namido moieties was confirmed by X-ray crystallography. When the ligand precursors of [(CH3)R2Si-C5H3N-C(H)PhN(H)Ar (R = Me or Ph, Ar = 2,6-diisopropylphenyl) were treated with in situ generated HfMe4, pincer-type [Csilylmethyl, Npyridine, Namido]HfMe2 complexes were afforded by formation of Hf-CH2Si bond. Pincer-type [Cnaphthyl, Sthiophene, Namido]HfMe2 complex, where the pyridine moiety in the flagship catalyst was replaced with a thiophene unit, was not generated when the corresponding ligand precursor was treated with HfMe4. Instead, the [Sthiophene, Namido]HfMe3-type complex was obtained with no formation of the Hf-Cnaphthyl bond. A series of pincer-type [Cnaphthyl, Npyridine, Nalkylamido]HfMe2 complexes was prepared where the arylamido moiety in the flagship catalyst was replaced with alkylamido moieties (alkyl = iPr, cyclohexyl, tBu, adamantyl). Structures of the complexes bearing isopropylamido and adamantylamido moieties were confirmed by X-ray crystallography. Most of the complexes cleanly generated the desired ion-pair complexes when treated with an equivalent amount of [(C18H37)2N(H)Me]+[B(C6F5)4]-, which showed negligible activity in olefin polymerization. Some complexes bearing bulky substituents showed moderate activities, even though the desired ion-pair complexes were not cleanly afforded.
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Affiliation(s)
- Su Jin Kwon
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea.
| | - Jun Won Baek
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea.
| | - Hyun Ju Lee
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea.
| | - Tae Jin Kim
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea.
| | - Ji Yeon Ryu
- Department of Chemistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Korea.
| | - Junseong Lee
- Department of Chemistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Korea.
| | - Eun Ji Shin
- LG Chem, Ltd., 188, Munji-ro, Yuseong-gu Daejeon 305-738, Korea.
| | - Ki Soo Lee
- LG Chem, Ltd., 188, Munji-ro, Yuseong-gu Daejeon 305-738, Korea.
| | - Bun Yeoul Lee
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea.
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16
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Kamigaito M, Satoh K, Uchiyama M. Degenerative chain‐transfer process: Controlling all chain‐growth polymerizations and enabling novel monomer sequences. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/pola.29257] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Masami Kamigaito
- Department of Molecular and Macromolecular ChemistryGraduate School of Engineering, Nagoya University Furo‐cho, Chikusa‐ku Nagoya 464‐8603 Japan
| | - Kotaro Satoh
- Department of Molecular and Macromolecular ChemistryGraduate School of Engineering, Nagoya University Furo‐cho, Chikusa‐ku Nagoya 464‐8603 Japan
| | - Mineto Uchiyama
- Department of Molecular and Macromolecular ChemistryGraduate School of Engineering, Nagoya University Furo‐cho, Chikusa‐ku Nagoya 464‐8603 Japan
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Kim SD, Kim TJ, Kwon SJ, Kim TH, Baek JW, Park HS, Lee HJ, Lee BY. Peroxide-Mediated Alkyl–Alkyl Coupling of Dialkylzinc: A Useful Tool for Synthesis of ABA-Type Olefin Triblock Copolymers. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00907] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Sung Dong Kim
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, South Korea
| | - Tae Jin Kim
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, South Korea
| | - Su Jin Kwon
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, South Korea
| | - Tae Hee Kim
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, South Korea
| | - Jun Won Baek
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, South Korea
| | - Hee Soo Park
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, South Korea
| | - Hyun Ju Lee
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, South Korea
| | - Bun Yeoul Lee
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, South Korea
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Polystyrene Chain Growth from Di-End-Functional Polyolefins for Polystyrene-Polyolefin-Polystyrene Block Copolymers. Polymers (Basel) 2017; 9:polym9100481. [PMID: 30965784 PMCID: PMC6418507 DOI: 10.3390/polym9100481] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 09/19/2017] [Accepted: 09/29/2017] [Indexed: 01/14/2023] Open
Abstract
Triblock copolymers of polystyrene (PS) and a polyolefin (PO), e.g., PS-block-poly(ethylene-co-1-butene)-block-PS (SEBS), are attractive materials for use as thermoplastic elastomers and are produced commercially by a two-step process that involves the costly hydrogenation of PS-block-polybutadiene-block-PS. We herein report a one-pot strategy for attaching PS chains to both ends of PO chains to construct PS-block-PO-block-PS directly from olefin and styrene monomers. Dialkylzinc compound containing styrene moieties ((CH₂=CHC₆H₄CH₂CH₂)₂Zn) was prepared, from which poly(ethylene-co-propylene) chains were grown via "coordinative chain transfer polymerization" using the pyridylaminohafnium catalyst to afford di-end functional PO chains functionalized with styrene and Zn moieties. Subsequently, PS chains were attached at both ends of the PO chains by introduction of styrene monomers in addition to the anionic initiator Me₃SiCH₂Li·(pmdeta) (pmdeta = pentamethyldiethylenetriamine). We found that the fraction of the extracted PS homopolymer was low (~20%) and that molecular weights were evidently increased after the styrene polymerization (ΔMn = 27⁻54 kDa). Transmission electron microscopy showed spherical and wormlike PS domains measuring several tens of nm segregated within the PO matrix. Optimal tensile properties were observed for the sample containing a propylene mole fraction of 0.25 and a styrene content of 33%. Finally, in the cyclic tensile test, the prepared copolymers exhibited thermoplastic elastomeric properties with no breakage up over 10 cycles, which is comparable to the behavior of commercial-grade SEBS.
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Park SS, Kim CS, Kim SD, Kwon SJ, Lee HM, Kim TH, Jeon JY, Lee BY. Biaxial Chain Growth of Polyolefin and Polystyrene from 1,6-Hexanediylzinc Species for Triblock Copolymers. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01365] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Seung Soo Park
- Department of Molecular Science
and Technology, Ajou University, Suwon 443-749, South Korea
| | - Chung Sol Kim
- Department of Molecular Science
and Technology, Ajou University, Suwon 443-749, South Korea
| | - Sung Dong Kim
- Department of Molecular Science
and Technology, Ajou University, Suwon 443-749, South Korea
| | - Su Jin Kwon
- Department of Molecular Science
and Technology, Ajou University, Suwon 443-749, South Korea
| | - Hyun Mo Lee
- Department of Molecular Science
and Technology, Ajou University, Suwon 443-749, South Korea
| | - Tae Hee Kim
- Department of Molecular Science
and Technology, Ajou University, Suwon 443-749, South Korea
| | - Jong Yeob Jeon
- Department of Molecular Science
and Technology, Ajou University, Suwon 443-749, South Korea
| | - Bun Yeoul Lee
- Department of Molecular Science
and Technology, Ajou University, Suwon 443-749, South Korea
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