An effective route for ring-opening copolymerization of beta-butyrolactone (BBL) with epsilon-decalactone (epsilon-DL) is reported. Microstructures of the block copolymers characterized by C-13 NMR spectroscopy revealed syndiotactic-enriched poly(3-hydroxybutyrate) (PHB) blocks. Several di-and triblock copolymers (PDL-b-PHB and PDL-b-PHB-b-PDL, respectively) were successfully synthesized by sequential addition of themonomers using (salan) Y(III) complexes as catalysts. The results from MALDI-ToF mass spectrometry confirmed the presence of the copolymers. Moreover, thermal properties of the block copolymers were also investigated and showed that the microphase separation of PDL-b-PHB copolymers into PHB- and PDL-rich domains has an impact on the glass transition temperatures of both blocks.

Stereoselective ring-opening (co)polymerization of β-butyrolactone and ε-decalactone using an yttrium bis(phenolate) catalytic system

Venditto V.
Investigation
;
2019-01-01

Abstract

An effective route for ring-opening copolymerization of beta-butyrolactone (BBL) with epsilon-decalactone (epsilon-DL) is reported. Microstructures of the block copolymers characterized by C-13 NMR spectroscopy revealed syndiotactic-enriched poly(3-hydroxybutyrate) (PHB) blocks. Several di-and triblock copolymers (PDL-b-PHB and PDL-b-PHB-b-PDL, respectively) were successfully synthesized by sequential addition of themonomers using (salan) Y(III) complexes as catalysts. The results from MALDI-ToF mass spectrometry confirmed the presence of the copolymers. Moreover, thermal properties of the block copolymers were also investigated and showed that the microphase separation of PDL-b-PHB copolymers into PHB- and PDL-rich domains has an impact on the glass transition temperatures of both blocks.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/4730702
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