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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...
Ternary stereocomplex (TSC) crystallization of optically active polyesters, l-configured poly(l-2-hydroxybutanoic acid) [P(l-2HB)], d-configured poly(d-2-hydroxybutanoic acid) [P(d-2HB)] and poly(d-lactic acid) (PDLA) from the melt is reported. Ternary P(l-2HB)/P(d-2HB)/PDLA blends were prepared by solution-casting to have a fixed content (50 mol%) of l-configured P(l-2HB) and different contents of...
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