Abstract
This study focuses on Meldrum’s acid (MA) polymerization mechanism as well as the properties of the correspond crosslinked polymers. In the first part, MA derivatives are blended with benzoxazine compound (F-BZ) with tertiary amine structure, which is a Lewis base, to undergo thermolysis at a much lower temperature. By means of DSC, TGA, FT-IR and NMR characterization, we confirmed its catalytic effect and mechanism. Furthermore, by this reaction mechanism, different equivalent MA derivative (MA-F) are applied to modify polybenzoxazine. Results indicate polymers modified with MA-F have poor thermal stability due to the week bonding of ester group. In the second part, MA monomer with two furan group (MA-FBCB) was synthesized and used to polymerize with a bismaleimide compound through Diels-Alder reaction (DA reaction). The molecular structure was further verified by DSC, TGA, FT-IR. This polymer has better solubility and hence better potential than MA monomer (MA-FBCB). After crosslinking, a material with better thermal behavior and low dielectric constants was obtained.