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G. Rokicki, T. Kowalczyk, M. Kaczorowski

Six-membered cyclic carbonates – epoxy resins modifiers

Polimery 2018, No 2, 90


DOI: dx.doi.org/10.14314/polimery.2018.2.2

Summary

A method of epoxy resin modification by biscyclic six-membered carbonates was presented. It was demonstrated that the reaction of oxiranes with six-membered cyclic carbonates catalyzed by Lewis acids takes place mainly with formation of five-six-membered spiroorthocarbonate. As a result, polyethercarbonates, polyethers and five-membered cyclic carbonates are formed. At low temperatures the reaction may stop at spiroorthocarbonate stage. We demonstrated that epoxy resin modified with 10 wt % of urethane oligomer terminated with six-membered carbonates or biscyclic carbonate containing triethylene glycol moiety exhibited 66–83 % higher impact strength than unmodified epoxy resin, while other mechanical parameters were left intact.
Keywords: biscyclic six-membered carbonates, epoxy resin modification, active cyclic carbonate diluent, cationic copolymerization of oxiranes with six-membered cyclic carbonates, ring-opening polymerization
e-mail: gabro@ch.pw.edu.pl
G. Rokicki, T. Kowalczyk, M. Kaczorowski (643.1 KB)
Six-membered cyclic carbonates – epoxy resins modifiers