Polymer network material comprising a poly(glycidyl ether) structure, method of its production and use
The present invention is related to novel preparative methods to a novel class of polymer network materials with a highly branched poly(glycidyl ether) (PGE) structure. Said polymer networks are prepared by a simple procedure involving ring-opening polymerisation and the method is applicable to a wide range of glycidyl ether containing monomers. The method comprises the step of copolymerising (A) at least one multi-topic glycidyl ether comprising at least three glycidyl ether groups with (B) at least one glycidyl ether component comprising at least one glycidyl ether group by ring opening polymerisation, wherein the multi-topic glycidyl ether (A) is glycerol glycidyl ether (GGE) having the Formula (I) and the glycidyl ether component (B) is selected from monoglycidyl ethers comprising one glycidyl ether group and diglycidyl ethers comprising two glycidyl ether groups.
1. A method of preparing a polymer network material comprising a poly(glycidyl ether) structure, the method comprising the step of copolymerising (A) at least one multi-topic glycidyl ether comprising glycerol glycidyl ether (GGE) having the Formula I
with (B) at least one glycidyl ether component, including at least one of general Formula II and general Formula IIc:
wherein
R 2 is a branched or unbranched C1-C10 alkyl or alkylene, a branched or unbranched C2-C10 alkenyl or alkenylene, a branched or unbranched C2-C10 alkinyl or alkinylene, a branched or unbranched C1-C10 alkyl ether or alkylene ether, a branched or unbranched C2-C10 alkenyl ether or alkenylene ether, a branched or unbranched C2-C10 alkinyl ether or alkinylene ether, and
m is 1 or 2,
or
R 2 is a polyether having the structure according to general Formula III
wherein R 3 may be a branched or unbranched C1-C10 alkylene, a branched or unbranched C2-C10 alkenylene, a branched or unbranched C2-C10 alkinylene and x is an integer in the range of from 10 to 1,000, and
m is 1;
wherein R 4 is hydrogen or methyl and x is an integer in the range of from 10 to 1,000,
wherein the copolymerisation step is followed by a step of functionalizing the polymer network material by covalently binding functional groups to the polymer network material.
2. The method according to claim 1 , wherein the glycidyl ether component (B) is a monoglycidyl ether having the structure according general Formula IIa
wherein R 2 is methyl, ethyl, ethene, n-propyl, isopropyl, propenyl (allyl), n-butyl, iso-butyl, tert-isobutyl, n-pentyl, iso-pentyl, or phenyl.
3. The method according to claim 1 , wherein the polyether group in Formula III has an average number molecular weight in the range of 100 to 50,000 g/mol.
4. The method according to claim 1 , wherein the copolymerisation is conducted in the presence of particles being essentially insoluble in the reaction mixture, and the copolymerisation step is followed by a step of extracting the particles by dissolving them with a solvent giving rise to a porous scaffold of the polymer network material having a pore size being defined by the particle size.
5. A polymer network material comprising a poly(glycidyl ether) structure obtained by the method according to claim 1 .
6. The method according to claim 1 , wherein the step of copolymerising comprises ring-opening polymerisation.
7. A medical or biomedical article prepared from the polymer network material of claim 5 .
8. The method according to claim 6 , wherein the ring-opening polymerisation is cationically initiated.
9. The method according to claim 8 , wherein the ring-opening polymerisation is cationically initiated by using a photoinitiator, a Lewis acid or a Bronsted acid.