Macromonomers for preparation of degradable polymers and model networks
The present invention relates to methods for preparing degradable model networks from any monomer functionality with any degradation methodology. It is based on the use of Atom-Transfer Radical Polymerization and CLICK chemistry to form the desired product.
1. A method of preparing a degradable allyl-terminated linear macromonomer, comprising:
a) preparing an initiator with at least one terminal halogen group, wherein the initiator contains a degradable linker for each of the terminal halogen groups, the degradable linker selected from the group consisting of a photodegradable linker, an ozonolyzable linker, and a biodegradable linker;
b) using the initiator, polymerizing a first monomer through ATRP to form a polymeric halide having at least one terminal halogen group; and
c) modifying the polymeric halide through a post-polymerization transformation to replace any terminal halogen groups with allyl groups.
2. The method of claim 1 wherein the post-polymerization transformation is conducted by reacting the polymeric halide with allyltributyltin.
3. The method of claim 1 , wherein the first monomer is selected from the group consisting of acrylates, methacrylates, styrenics, and polyacids.
4. The method of claim 1 , wherein the polymerization step is repeated using a second monomer.