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The copolymers of l-lactic acid (LLA) and l-2hydroxybutanoic acid (L-2HB) [P(LLA-co-L-2HB)s] having relatively random monomer sequences were synthesized by polycondensation. It was first revealed that the cocrystallization of LLA and L-2HB units occurs in P(LLA-co-L-2HB) copolymers for a wide comonomer unit (L-2HB unit) content range of 27–74 mol% during precipitation and melt-crystallization. The...
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