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- W4308203429 abstract "Dynamic covalent bonding can be used to construct covalent adaptable networks (CANs), which show superior properties compared to thermosetting networks. Compared to chemical synthesis or functional modification of polymers, reactive processing of polymers is a facial method to fabricate CANs. By reactive blending of commodity polymers PC and PMMA with catalysis of readily available organic salt Mg(TFSI) 2 , we fabricated transparent vitrimer-like blend films. After reactive blending in twin-screw extruder, an elution experiment with mutual solvent (chloroform) of PC and PMMA was done on the blends and it turns out to be presence of some insoluble residuals, revealing a crosslinked network formation. Compression molding of the insoluble network leads to transparent films, indicating a covalent adaptable network formation. The CANs are swollen in THF or chloroform at room temperature, but soluble at high temperatures, revealing a dissociative bonding mechanism. Rheological analysis shows that shift factors follow an Arrhenius relationship against 1/T, suggesting a vitrimer-like behavior. • We provide a facile way to prepare the covalent adaptable networks (CANs) based on reactive blending of two commercial polymers. • Addition of organic salt Mg(TFSI) 2 to PC/PMMA blends accelerated the rate of transesterification reaction, and thus transform the transesterification to dynamic covalent bonding. • The dynamic covalent network is indeed a network comprised of grafted copolymers." @default.
- W4308203429 created "2022-11-09" @default.
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- W4308203429 date "2022-12-01" @default.
- W4308203429 modified "2023-09-29" @default.
- W4308203429 title "Vitrimer-like transparent blend films based on reactive blending of PC and PMMA with catalysis of Mg(TFSI)2" @default.
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- W4308203429 doi "https://doi.org/10.1016/j.coco.2022.101394" @default.
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