  This work discusses the boundedness of solutions for impulsive Duffing
equation with time-dependent polynomial potentials. By KAM theorem, we prove
that all solutions of the Duffing equation with low regularity in time
undergoing suitable impulses are bounded for all time and that there are many
(positive Lebesgue measure) quasi-periodic solutions clustering at infinity.
This result extends some well-known results on Duffing equations to impulsive
Duffing equations.
