Christophe Boisson
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View article: New Thermoplastic Elastomers based on Ethylene‐Butadiene‐Rubber (EBR) by Switching from Anionic to Coordinative Chain Transfer Polymerization
New Thermoplastic Elastomers based on Ethylene‐Butadiene‐Rubber (EBR) by Switching from Anionic to Coordinative Chain Transfer Polymerization Open
Olefin triblock copolymers based on glassy polystyrene (PS), ethylene butadiene rubber (EBR) and highly crystalline polyethylene (PE) segments were prepared for the first time using a switch strategy from anionic polymerization to coordina…
View article: Association of Zn- and Mg-based chain transfer agents in coordinative chain transfer polymerizations of olefins for enhanced control and activity
Association of Zn- and Mg-based chain transfer agents in coordinative chain transfer polymerizations of olefins for enhanced control and activity Open
ZnEt 2 is used for the first time as a reversible transfer agent in olefin polymerization with a neodymium metallocene catalyst. Its presence has improved the catalyst's performance for the coordinative chain transfer polymerization of eth…
View article: Highly Active Immobilized Catalyst for Ethylene Polymerization: Neutral Single Site Y(III) Complex Bearing Bulky Silylallyl Ligand
Highly Active Immobilized Catalyst for Ethylene Polymerization: Neutral Single Site Y(III) Complex Bearing Bulky Silylallyl Ligand Open
Exploring the surface organometallic chemistry on silica of highly electrophilic yttrium complexes is a relatively uncommon endeavor, particularly when focusing on tris‐alkyl complexes characterized by Y−C σ‐alkyl bonds. A drawback with th…
View article: Nitriles as Functionalization and Coupling Agents for Polyolefins Obtained by Coordinative Chain Transfer Polymerization
Nitriles as Functionalization and Coupling Agents for Polyolefins Obtained by Coordinative Chain Transfer Polymerization Open
Coordinative chain transfer polymerization (CCTP) of ethylene and its copolymerization with 1,3‐butadiene is conducted in toluene at 80 °C using a combination of {(Me 2 Si(C 13 H 8 ) 2 )Nd(μ‐BH 4 )[(μ‐BH 4 )Li(THF)]} 2 ( 1 ) metal complex …
View article: Multiblock Copolymers Based on Highly Crystalline Polyethylene and Soft Poly(ethylene‐<i>co</i>‐butadiene) Segments: Towards Polyolefin Thermoplastic Elastomers
Multiblock Copolymers Based on Highly Crystalline Polyethylene and Soft Poly(ethylene‐<i>co</i>‐butadiene) Segments: Towards Polyolefin Thermoplastic Elastomers Open
Block copolymers based on polyethylene (PE) and ethylene butadiene rubber (EBR) were obtained by successive controlled coordinative chain transfer polymerization (CCTP) of a mixture of ethylene and butadiene (80/20) and pure ethylene. EBR‐…
View article: Deciphering Siloxane Bond Exchanges: From a Molecular Study to Vitrimerization and Recycling of Silicone Elastomers
Deciphering Siloxane Bond Exchanges: From a Molecular Study to Vitrimerization and Recycling of Silicone Elastomers Open
The activity of various additives promoting siloxane equilibration reactions is examined and quantified on model compounds. We found in particular that the “superbase” phosphazene derivative P 4 ‐ t Bu can promote very fast exchanges (a fe…
View article: Cationic Phenoxyimine Complexes of Yttrium: Synthesis, Characterization, and Living Polymerization of Isoprene
Cationic Phenoxyimine Complexes of Yttrium: Synthesis, Characterization, and Living Polymerization of Isoprene Open
International audience
View article: Ethylene‐Coordinative Chain‐Transfer Polymerization‐Induced Self‐Assembly (CCTPISA)
Ethylene‐Coordinative Chain‐Transfer Polymerization‐Induced Self‐Assembly (CCTPISA) Open
Block copolymers based on ethylene (E) and butadiene (B) were prepared using the ansa ‐bis(fluorenyl) complex {Me 2 Si(C 13 H 8 ) 2 Nd(BH 4 ) 2 Li(THF)} 2 in combination with ( n‐ Bu)( n‐ Oct)Mg (BOMAG) as a chain‐transfer agent. The diblo…
View article: Switch from Anionic Polymerization to Coordinative Chain Transfer Polymerization: A Valuable Strategy to Make Olefin Block Copolymers
Switch from Anionic Polymerization to Coordinative Chain Transfer Polymerization: A Valuable Strategy to Make Olefin Block Copolymers Open
Anionic polymerization of butadiene or/and styrene is performed with lithium initiators, functional or not. The polymer chains are subsequently transferred to magnesium. The resulting polymeryl‐magnesium compounds were combined with {(Me 2…
View article: CCDC 2089825: Experimental Crystal Structure Determination
CCDC 2089825: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Design of selective divalent chain transfer agents for coordinative chain transfer polymerization of ethylene and its copolymerization with butadiene
Design of selective divalent chain transfer agents for coordinative chain transfer polymerization of ethylene and its copolymerization with butadiene Open
A selective divalent chain transfer agent is designed to exclusively lead to polyolefin chain growth on a divalent pentanediyl moiety via coordinative chain transfer polymerization (CCTP).
View article: Organocatalytic Synthesis of Substituted Vinylene Carbonates
Organocatalytic Synthesis of Substituted Vinylene Carbonates Open
The organocatalytic synthesis of substituted vinylene carbonates from benzoins and acyloins was studied using diphenyl carbonate as a carbonyl source. A range of N ‐Heterocyclic Carbene (NHC) precursors were screened and it was found that …
View article: Organocatalytic synthesis of vinylene carbonates
Organocatalytic synthesis of vinylene carbonates Open
The organocatalytic synthesis of vinylene carbonates from benzoins and acyloins was studied using diphenyl carbonate as a carbonyl source. A range of N-Heterocyclic Carbene (NHC) precursors were screened and it was found that imidazolium s…
View article: Organocatalytic synthesis of vinylene carbonates
Organocatalytic synthesis of vinylene carbonates Open
The organocatalytic synthesis of vinylene carbonates from benzoins and acyloins was studied using diphenyl carbonate as a carbonyl source. A range of N-Heterocyclic Carbene (NHC) precursors were screened and it was found that imidazolium s…
View article: Monocationic Bis-Alkyl and Bis-Allyl Yttrium Complexes: Synthesis, <sup>89</sup>Y NMR Characterization, Ethylene or Isoprene Polymerization, and Modeling
Monocationic Bis-Alkyl and Bis-Allyl Yttrium Complexes: Synthesis, <sup>89</sup>Y NMR Characterization, Ethylene or Isoprene Polymerization, and Modeling Open
International audience
View article: Thermomorphic Polyethylene‐Supported Organocatalysts for the Valorization of Vegetable Oils and CO<sub>2</sub>
Thermomorphic Polyethylene‐Supported Organocatalysts for the Valorization of Vegetable Oils and CO<sub>2</sub> Open
A range of thermomorphic polyethylene‐supported organocatalysts is prepared from N ‐alkyl imidazoles and polyethylene iodide (PEI) with good yields (85–92%) and high funtionality (98–99%). The catalytic activity of these species is studie…
View article: Ene/Diene Copolymerization Catalyzed by Cationic Sc and Gd d<sup>0</sup> Metal Complexes: Speciation, Ion Pairing, and Selectivity from a Computational Perspective
Ene/Diene Copolymerization Catalyzed by Cationic Sc and Gd d<sup>0</sup> Metal Complexes: Speciation, Ion Pairing, and Selectivity from a Computational Perspective Open
International audience
View article: Engineering Poly(ethylene-<i>co</i>-1-butene) through Modulating the Active Species by Alkylaluminum
Engineering Poly(ethylene-<i>co</i>-1-butene) through Modulating the Active Species by Alkylaluminum Open
International audience
View article: One-pot syntheses of heterotelechelic α-vinyl,ω-methoxysilane polyethylenes and condensation into comb-like and star-like polymers with high chain end functionality
One-pot syntheses of heterotelechelic α-vinyl,ω-methoxysilane polyethylenes and condensation into comb-like and star-like polymers with high chain end functionality Open
Crystalline and functional comb-like and star-like polyethylene architectures.
View article: Titanium-based phenoxy-imine catalyst for selective ethylene trimerization: effect of temperature on the activity, selectivity and properties of polymeric side products
Titanium-based phenoxy-imine catalyst for selective ethylene trimerization: effect of temperature on the activity, selectivity and properties of polymeric side products Open
A thermal switch of selectivity for a phenoxy-imine titanium catalyst was studied by combining kinetic studies and a “polymer-to-catalyst” approach.
View article: Chemical Composition of Hexene‐Based Linear Low‐Density Polyethylene by Infrared Spectroscopy and Chemometrics
Chemical Composition of Hexene‐Based Linear Low‐Density Polyethylene by Infrared Spectroscopy and Chemometrics Open
Mid and near infrared (MIR and NIR) spectroscopy associated with the partial least squares (PLS) method makes it possible to rapidly characterize the composition of linear low‐density polyethylene (LLDPE) in a large range of 1‐hexene conte…
View article: Polyethylene Aerogels with Combined Physical and Chemical Crosslinking: Improved Mechanical Resilience and Shape‐Memory Properties
Polyethylene Aerogels with Combined Physical and Chemical Crosslinking: Improved Mechanical Resilience and Shape‐Memory Properties Open
While the introduction of polymers into aerogels strongly enhances their toughness, truly elastic monolithic aerogels which restore their dimensions upon extensive compression are still challenging to synthesize. In this context hydrophobi…
View article: Identification of a Transient but Key Motif in the Living Coordinative Chain Transfer Cyclocopolymerization of Ethylene with Butadiene
Identification of a Transient but Key Motif in the Living Coordinative Chain Transfer Cyclocopolymerization of Ethylene with Butadiene Open
International audience
View article: An Advanced Technique for Linear Low‐Density Polyethylene Composition Determination: TGA–IST16–GC–MS Coupling
An Advanced Technique for Linear Low‐Density Polyethylene Composition Determination: TGA–IST16–GC–MS Coupling Open
An innovative method based on thermogravimetric analysis combined with gas chromatography and mass spectrometry, TGA–IST16–GC–MS, is developed for measuring the comonomer type and the comonomer content in a series of linear low‐density pol…
View article: Molecular Dynamics Simulation of Ethylene/Hexene Copolymer Adsorption onto Graphene: New Insight into Thermal Gradient Interaction Chromatography
Molecular Dynamics Simulation of Ethylene/Hexene Copolymer Adsorption onto Graphene: New Insight into Thermal Gradient Interaction Chromatography Open
Front Cover: Thermal gradient interaction chromatography (TGIC) is a powerful method for the determination of short-chain branching (SCB) in linear low-density polyethylene (LLDPE). The TGIC fractionation mechanism relies on the interactio…
View article: Structural and Mechanical Properties of Supramolecular Polyethylenes
Structural and Mechanical Properties of Supramolecular Polyethylenes Open
Thymine (Thy) or 2,6-diamino-1,3,5-triazine\n(DAT) end-groups were\nefficiently installed on well-defined polyethylenes (PEs) synthesized\nby catalyzed chain growth (CCG) polymerization. Mono- and bifunctional\nlow-molar mass PEs (1200–150…
View article: Polyolefins, a Success Story
Polyolefins, a Success Story Open
This paper reports the principal discoveries which have played a major role in the polyolefin field and have positioned polyolefins as the most produced plastics. The early development of polyolefins covering the production of LDPE (Low de…
View article: CCDC 1400298: Experimental Crystal Structure Determination
CCDC 1400298: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Ethylene–Butadiene Copolymerization by Neodymocene Complexes: A Ligand Structure/Activity/Polymer Microstructure Relationship Based on DFT Calculations
Ethylene–Butadiene Copolymerization by Neodymocene Complexes: A Ligand Structure/Activity/Polymer Microstructure Relationship Based on DFT Calculations Open
Ethylene/butadiene\ncopolymerization can be performed by neodymocene\ncatalysts in the presence of an alkylating/chain transfer agent. A\nvariety of polymerization activities and copolymer microstructures\ncan be obtained depending on the …