Bulk ring-opening transesterification polymerization of the renewable δ-decalactone using an organocatalyst

Mark T. Martello, Adam Burns, Marc Hillmyer

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

Abstract

The bulk ring-opening polymerization of renewable δ-decalactone using 1,5,7-triazabicyclo[4.4.0]dec-5-ene was carried out at temperatures between 7 and 110 °C. The equilibrium monomer concentration for reactions within this temperature range was used to determine the polymerization thermodynamic parameters (ΔH p = -17.1 ± 0.6 kJ mol -1, ΔS p = -54 ± 2 J mol -1 K -1) for δ-decalactone. The polymerization kinetics were established and high molar mass poly(δ-decalactone) was prepared with a glass transition temperature of -51 °C. Poly(δ-decalactone) samples with controlled molar mass and narrow molar mass distributions were realized by controlling the monomer conversion and initiator concentration. A high molar mass poly(lactide)- poly(δ-decalactone)-poly(lactide) triblock copolymer with a low polydispersity index was prepared by simple sequential addition of monomers. The product triblock exhibited two distinct glass transitions temperatures consistent with microphase segregation.

Original languageEnglish (US)
Pages (from-to)131-135
Number of pages5
JournalACS Macro Letters
Volume1
Issue number1
DOIs
StatePublished - Aug 20 2012

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