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Although 2,2,4,4-tetramethyl-1,3-cyclobutadione (TMCBDI) has been known for more than 50 years, it has never been used for synthesis of polymer primarily due to its inefficiency in direct polycondensation reaction. We report the first synthesis of high molecular weight polyimines prepared from TMCBDI using Pd-catalyzed Suzuki coupling polymerization. To overcome sluggish condensation polymerization...
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