Original Article:
Fluoroantimonic acid hexahydrate (HSbF6·6H2O) catalysis: The ring-opening polymerization of epoxidized soybean oil
Zengshe Liu, et al.
Applied Catalysis A: General, 2013, 453, 370-375.
10.1016/j.apcata.2012.12.028
A superacid is an extremely strong acid, defined as any compound with an acidity greater than 100% pure sulfuric acid, with a Hammett acidity function (H0) of -12. Among these, fluoroantimonic acid (HFSbF6) is 1016 times stronger than 100% sulfuric acid and produces solutions with H0 as low as –28.
Past studies have reported the preparation of oligomeric polyether polyols through fluoroantimonic acid catalyzed ring-opening polymerization of epoxidized methyl oleate and the subsequent partial reduction of ester groups to give primary alcohols for polyurethane applications.
In this work, the authors reported that fluoroantimonic acid hexahydrate (HSbF6·6H2O) catalyzed the ring-opening polymerization of epoxidized soybean oil (ESO) in ethyl acetate medium and obtained SA-RPESO crosslinked polymer, as the picture shows.
Due to the long fatty acid chains in the triglyceride molecule, the Tg values of the obtained SA-RPESO polymers ranged from -13 °C to -21 °C. Furthermore, the authors investigated the effects of polymerization temperature, initiator concentration, and monomer concentration on the thermal properties of SA-RPESO polymers.
The conditions studied included varying temperatures from 25 °C to 35 °C, initiator concentrations from 0.3 mmol to 0.9 mmol, and monomer concentrations from 0.03 mol to 0.05 mol. The results showed that all SARPESO polymers exhibited thermal stability up to 200 °C, and the decomposition temperature was found to be mainly above 340 °C.
Chemicals Related in the Paper:
| Catalog Number | Product Name | Structure | CAS Number | Price |
|---|---|---|---|---|
| ACM72121438 | Fluoroantimonic acid hexahydrate |  |
72121-43-8 | Price |
| ACM54764328 | Deuterofluoroantimonic acid |  |
54764-32-8 | Price |
