화학공학소재연구정보센터
Reactive & Functional Polymers, Vol.116, 41-48, 2017
Dynamic furan/maleimide bond-incorporated cyclic polymer for topology transformation
The transformation of polymer topological structures by using an external stimulus has gained increasing attention because it is a versatile method to modify the properties of polymeric materials. Herein, cyclic poly (methyl methacrylate) linked by a dynamic covalent furan/maleimide bond was rationally designed and prepared. SEC, FTIR, NMR, and MALDI-TOF characterizations all confirmed the successful preparation of the polymer. By using the (retro)Diels-Alder reaction at a high temperature (110 degrees C), the cyclic polymer was transformed to a linear monopolymer or linear multiblock polymer. In addition, the cyclic topology can also be fixed by eliminating the vinyl double group of furan/maleimide adduct by the photoinduced radical thiol-ene reaction. This work provides a novel and facile approach for cyclic-to-linear topological transformation, and many potentials based on this thermal-responsive polymer are envisioned.