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As a promising structural material, various tough hydrogels have been developed in recent years by incorporating different kinds of noncovalent bonds as the energy-dissipating segments. Among these systems, it is challenging to use hydrogen bonds due to their instability in aqueous environment. Here we report a tough hydrogel of poly(1-vinylimidazole-co-acrylic acid) (P(VI-co-AAc)) reinforced by the...
High-performance butyl methacrylate/acrylamide/acrylic acid (BMA/AM/AA) copolymers, being the precursor of PMI foam, were synthesized by free radical bulk copolymerization. Transformation of the molecular structures of AM/AA copolymers, BMA/AM copolymers and BMA/AM/AA copolymers was deeply investigated by use of 13C and 1H NMR, FTIR, DSC, TGA, DMA and mechanical property test. Results confirmed the...
Butyl methacrylate (BMA)/acrylamide (AM) (co)polymers were synthesized through free radical bulk copolymerization by two steps. Effect of synthesis process on the molecular structure and properties of BMA/AM (co)polymers was deeply investigated. 13C NMR results indicated that AM only participated in copolymerization with BMA, which would be promoted under a higher prepolymerization temperature. A...
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