Abstract
Tri-functional methacrylate (MA3) having thermally degradable tertiary ester linkages was synthesized by a convergent approach. When the MA3 film containing a thermal initiator and a photoacid generator was heated under nitrogen atmosphere, it became insoluble. The thermally cured MA3 became soluble after irradiated and followed by baking at 120 °C. Acid catalyzed decomposition of the tertiary ester linkages of the MA3 moiety occurred at lower temperatures than non-catalyzed one. A mechanism for the photo- or thermal curing and photoassisted-thermal degradation was studied by FT-IR, 1H NMR, TGA, MS, and SEC analyses.
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