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Cocatalysts for Metal‐Catalyzed Olefin Polymerization: Activators, Activation Processes, and Structure—Activity Relationships
Completely recyclable biopolymers with linear and cyclic topologies via ring-opening polymerization of γ-butyrolactone.
It is reported that the ROP of γ-BL can, with a suitable catalyst, proceed smoothly to high conversions under ambient pressure to produce PγBL materials with a number-average molecular weight up to 30 kg mol(-1) and with controlled linear and/or cyclic topologies.
Integrated Catalytic Process for Biomass Conversion and Upgrading to C12 Furoin and Alkane Fuel
Report herein is an integrated catalytic process for conversion and upgrading of biomass feedstocks into 5,5′-dihydroxymethyl furoin (DHMF), through self-coupling of 5-hydroxymethyl furfural (HMF)…
Ionic Liquid−Water Mixtures: Enhanced Kw for Efficient Cellulosic Biomass Conversion
Under relatively mild conditions (≤140 °C, 1 atm) and in the absence of added acid catalysts typically employed in biomass conversion, cellulose dissolved in certain ionic liquids (ILs) has been…
Recyclable Supported Carbene Catalysts for High-Yielding Self-Condensation of Furaldehydes into C10 and C12 Furoins
Two highly efficient and recyclable heterogeneous azolium catalyst systems, one grafted (g) onto the inorganic oxide (Silica) and the other onto the organic polymer [Merrifield’s peptide or…
Cocatalysts for metal-catalyzed olefin polymerization: activators, activation processes, and structure-activity relationships.
Commercialization of new generations of single-site and metallocene catalyst-based technologies has provided the multibillion pound per year polyolefins industry with the ability to deliver a wide range of new and innovative olefin-based polymers having improved properties.
Chemically recyclable polymers: a circular economy approach to sustainability
The current practices in the generation and disposal of synthetic polymers are largely unsustainable. As part of the solution, the development of biodegradable polymers, which constitute a class of…
A synthetic polymer system with repeatable chemical recyclability
A polymer system based on γ-butyrolactone (GBL) with a trans-ring fusion at the α and β positions renders the commonly considered as nonpolymerizable GBL ring readily polymerizable at room temperature under solvent-free conditions to yield a high–molecular weight polymer.
Probing site cooperativity of frustrated phosphine/borane Lewis pairs by a polymerization study.
The first highly active phosphine (P)/borane (B) Lewis pair polymerization is promoted unexpectedly by P-B adducts, which results in the first polymerization of a renewable acrylic monomer.
The Quest for Converting Biorenewable Bifunctional α-Methylene-γ-butyrolactone into Degradable and Recyclable Polyester: Controlling Vinyl-Addition/Ring-Opening/Cross-Linking Pathways.
- Xiaoyan Tang, Miao Hong, L. Falivene, L. Caporaso, L. Cavallo, E. Chen
- ChemistryJournal of the American Chemical Society
- 19 October 2016
This work reverses this conventional chemoselectivity to enable the first ring-opening polymerization (ROP) of MBL, thereby producing exclusively unsaturated polyester P(MBL)ROP with Mn up to 21.0 kg/mol.