Sustainable poly(lactide-b-butadiene) multiblock copolymers with enhanced mechanical properties

Intaek Lee, Tessie R. Panthani, Frank S. Bates

Research output: Contribution to journalArticlepeer-review

59 Scopus citations


To develop mechanically improved polylactide (PLA)-based sustainable polymers, a series of poly(lactide-b-butadiene) (PLA-PB) multiblock copolymers were synthesized in a two-step procedure: PLA-PB-PLA (LBL) triblock copolymers were prepared using ring-opening polymerization of d,l-lactide, followed by chain extension of LBL triblock polymers with toluene-2,4-diisocyanate (TDI) and terephthaloyl chloride (TCl). Molecular characterization revealed that the synthetic procedures yielded the desired triblock and multiblock copolymers with a composition range of 0.5 ≤ fPLA ≤ 0.9. Differential scanning calorimetry (DSC), small-angle X-ray scattering (SAXS), and transmission electron microscopy (TEM) demonstrated nearly identical, well-ordered, morphologies in the homologous triblock and multiblock copolymer materials, in sharp contrast with the findings of a recent study involving poly(styrene-b-butadiene) (PS-PB) multiblock polymers. These results indicate a transition from classically ordered morphologies to a state of bicontinuous disorder for multiblocks containing âŸ̈n′âŸ

Original languageEnglish (US)
Pages (from-to)7387-7398
Number of pages12
Issue number18
StatePublished - Sep 24 2013

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