Toward the (nearly) complete elimination of solvent waste in Ring Opening Metathesis Polymerization (ROMP) reactions

Ring opening metathesis polymerization (ROMP) and thio‐bromo “click” chemistry approach toward the preparation of flame‐retardant polymers

“…These studies revealed 15 to undergo a more complex degradation path than unfunctionalized counterpart (polycyclooctene). First of all, in both inert and oxidative atmospheres, 15 showed initial degradation much lower than polycyclooctene (similar to previous literature examples) at around 240 °C. However, 15 retained about 30% and 20% weight (at temperatures upward of 700 °C) under N 2 and air, respectively, while the unfunctionalized polymer degraded completely (final residue below 2%).…”

“…Once 6 was in hand, it was subsequently subjected to standard ROMP conditions using a Grubbs 3rd generation‐type initiator 7 . In the interest of designing simple, benchtop operations, 6 could be polymerized using solvent‐free conditions under air . Although this provides products with broader molecular weight distribution than what is typically observed in ROMP, it represents a very simple and quick method for preparing polymeric materials without the need of any sophisticated apparatus.…”

“…In addition to these free radical systems, ring opening metathesis polymerization (ROMP) techniques have become ubiquitous as they allow for the preparation of designer macromolecules with well‐controlled molecular weight, polydispersity index (PDI), and morphology. Furthermore, the Grubbs‐type initiators are tolerant to a wide variety of functionality and are extremely operationally simple (their reactions can be carried out using equipment no more sophisticated than what is typically found in undergraduate laboratories). In this contribution, we highlight that this is a benefit to their use even in cases where superb control over molecular weight or PDI are not necessarily that important …”

Substantially reinforcing plant oil-based materials via cycloaliphatic epoxy with double bond-bridged structure

“…1 H NMR was performed using a Bruker 300 MHz spectrometer at room temperature. 13 C NMR spectra were recorded using a Bruker 600 MHz spectrometer at room temperature. Deuterated chloroform (CDCl 3 ) was used as solvent for NMR tests.…”

“…Olefin metathesis has been developed in recent years as a powerful tool for the construction of defined micromolecular and polymeric architectures, including ring-opening metathesis (ROM), ring-closing metathesis (RCM), ring-opening metathesis polymerization (ROMP), acyclic diene metathesis polymerization (ADMET), cross-metathesis, and self-metathesis. [7][8][9][10][11][12][13][14][15][16][17][18] Among these reaction pathways, Self-metathesis has become an increasingly important tool in molecular design and synthesis owing to the ruthenium based catalysts developed by Grubbs and Hoveyda-Grubbs. 19,20 The 4-ethenyl-7-oxabicyclo[4.1.0]heptanes (ECP) is one kind of alicyclic epoxy monomer bearing a terminal alkene (Figure 1).…”