| abstract |
The present invention comprises at least two dienophile groups and at least two ring structures, wherein the ring structure has two conjugated carbon-carbon double bonds and leaving groups L, and the ring structure is in the presence of heat or other energy sources. When reacted with the dienophile, the leaving group L is released to form an aromatic ring structure.n n n The present invention also relates to curable oligomers or polymers and higher crosslinked polymers made from such monomers. In addition, the present invention relates to a method of preparing a porous film by mixing such monomers or oligomers thereof with porogens, curing the polymer and removing the porogens. |