Abstract
Anionic copolymerization of bicyclic bis (γ-lactone) with triglycidyl isocyanurate was carried out to obtain the corresponding crosslinked polymer quantitatively by controlling the copolymerization conditions.
This crosslinking reaction proceeded could afford the successive double ring-opening isomerization of bicyclic bis (γ-lactone) and the ring-opening of oxiranes alternately to obtain the crosslinked polyesters having ketone groups.
The structure of the alternating copolymer was confirmed by IR spectra and elemental analysis. The glass transition temperature of the crosslinked polymers was possible to be controlled by the addition of styrene oxide. The volume shrinkage during the crosslinking could be suppressed by ring-opening of the bicyclic bis (γ-lactone).
