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Cross-Linking And Modification Of Poly(ethylene Terephthalate-co-2,6-anthracenedicarboxylate) By Diels-Alder Reactions With Maleimides
Published 1999 · Chemistry
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Poly(ethylene terephthalate) (PET) copolymers containing 2,6-anthracenedicarboxylate structural units are modified by Diels−Alder reactions with maleimides. Low molecular weight bis(maleimide)s are used to chain extend and cross-link the polymers. The resulting materials were characterized by 1H NMR, UV−vis, DSC, and dilute solution viscometry. The Diels−Alder reaction of low molecular weight anthracenes and maleimides is thermally reversible at 250 °C. However, the reverse reaction is slow, and the PET−anthracene copolymers are prone to thermal decomposition at these higher temperatures.