5 research outputs found
Carbonylative Polymerization of Propylene Oxide: A Multicatalytic Approach to the Synthesis of Poly(3-Hydroxybutyrate)
No full textWe report a highly efficient method for the synthesis of poly(3-hydroxybutyrate) by the carbonylative polymerization of propylene oxide. The use of compatible epoxide carbonylation and lactone polymerization catalysts allows for a one-pot reaction that eliminates the need to isolate and purify the toxic β-butyrolactone intermediate
Carbonylation of Ethylene Oxide to β‑Propiolactone: A Facile Route to Poly(3-hydroxypropionate) and Acrylic Acid
No full textWe
report an improved synthesis of poly(3-hydroxypropionate) (P3HP)
from ethylene oxide (EO) and carbon monoxide (CO) through the intermediate
β-propiolactone (PL). The optimized carbonylation of EO resulted
in high selectivity for PL using a bimetallic [Lewis acid]<sup>+</sup>[Co(CO)<sub>4</sub>]<sup>−</sup> catalyst. Anionic ring-opening
polymerization of PL by organic ionic compounds to afford P3HP was
also investigated. A phosphazenium carboxylate initiator displays
the highest activity for the polymerization and produces polyesters
with molecular weights over 100 kDa and narrow molar mass distributions.
Furthermore, the known rearrangement of PL and the thermolysis of
P3HP provide efficient EO-based routes to the important commodity
chemical acrylic acid
Polymerization of Enantiopure Monomers Using Syndiospecific Catalysts: A New Approach To Sequence Control in Polymer Synthesis
No full textPolymerization of Enantiopure Monomers Using Syndiospecific Catalysts: A New Approach To Sequence Control in Polymer Synthesi
Polymerization of Enantiopure Monomers Using Syndiospecific Catalysts: A New Approach To Sequence Control in Polymer Synthesis
No full textPolymerization of Enantiopure Monomers Using Syndiospecific Catalysts: A New Approach To Sequence Control in Polymer Synthesi
Polymerization of Enantiopure Monomers Using Syndiospecific Catalysts: A New Approach To Sequence Control in Polymer Synthesis
No full textPolymerization of Enantiopure Monomers Using Syndiospecific Catalysts: A New Approach To Sequence Control in Polymer Synthesi
