Acyclic diene metathesis (ADMET) polymerization. Synthesis of an unsaturated polyester

Acyclic diene metathesis (ADMET) polymerization of allyl undec-10-enoate and some related esters

“…In all cases the E-:Z-isomer ratios were approximately 80%:20%. In view of the earlier ADMET results with catalysts 3 and 4 [13,14,17,18], it was not surprising that the experiments with monomers 10-13 were successful, but the success with allyl undec-10-enoate (7) was very surprising. Accordingly the polymerization of 7 was repeated several times.…”

“…Reaction solvents were dried and distilled immediately before use. 13 C NMR spectra were obtained on a Unity 500 MHz instrument with samples in CDCl 3 . For integrations a ''slow pulse'' sequence was used (pulse delay 30 s; >200 repetitions)…”

“…Various x-alkenyl esters have been polymerized successfully by ADMET before using Schrock's catalysts 3 or 4 [13,14], but attempts to polymerize allyl esters have met with little success [14]. For example, diallyl terephthalate (5) did not polymerize when treated with Schrock's catalyst 3 [14].…”

High‐Impact Polyamide Composites with Linear Ethylene–Norbornene Anhydride Copolymers from Insertion Polymerization

“…[6][7][8][9] These complexes hence offer a catalytic access to linear functional poylethylenes on the basis of an industrially available monomer feedstock without elaborate monomer synthesis or protecting schemes as is the case for other catalytic methods such as ROMP [10] or ADMET. [11,12] However, most polar vinyl . Furthermore, the norbornene anhydride functionality serves as a reaction site for postpolymerization functionalization with alcohols to obtain the respective half-and diesters of the anhydride functionality.…”

Cyclo-depolymerization of olefin-containing polymers to give macrocyclic oligomers by metathesis and the entropically-driven ROMP of the olefin-containing macrocyclic esters

“…In one approach [14,18], strained cyclic olefins such as norbornene and cyclooctene are subjected to ROMP: see Reaction 1 in Scheme 2. In the other approach [14,19,20], a,u-divinyl compounds are polymerized by, what is termed, acyclic diene metathesis (ADMET): see Reaction 2 in Scheme 2. The latter are condensation polymerizations where ethylene is the condensate and, because metathesis is reversible, the ethylene must be carefully removed from the reaction system if significant molecular weights are to be obtained.…”