info:eu-repo/semantics/article
Facile one-pot synthesis and solution behavior of poly(acrylic acid)-block-polycaprolactone copolymers
Fecha
2019-01Registro en:
de Freitas, Augusto G. O.; Muraro, Paulo I. R.; Bortolotto, Tanize; Trindade, Suelen G.; Schmidt, Vanessa; et al.; Facile one-pot synthesis and solution behavior of poly(acrylic acid)-block-polycaprolactone copolymers; Elsevier Science; Journal of Molecular Liquids; 273; 1-2019; 99-106
0167-7322
CONICET Digital
CONICET
Autor
de Freitas, Augusto G. O.
Muraro, Paulo I. R.
Bortolotto, Tanize
Trindade, Suelen G.
Schmidt, Vanessa
Lopes, Leonardo Q. S.
Ninago, Mario Daniel
Satti, Angel Jose
Ciolino, Andrés Eduardo
Villar, Marcelo Armando
Giacomelli, Cristiano
Resumen
A metal-free protocol to obtain poly(acrylic acid)-block-polycaprolactone diblock copolymers (PAA-b-PCL) by a one-pot method involving simultaneous Reversible Addition-Fragmentation Chain Transfer (RAFT) and Ring Opening Polymerization (ROP) processes is reported. The strategy is based on the use of diphenyl phosphate (DPP) as catalyst and a bifunctional compound that acts as both chain transfer agent (CTA) in the acrylic acid RAFT polymerization process and co-initiator in the ε-caprolactone (ε-CL) ROP process. PAA-b-PCL diblock copolymers were obtained with near quantitative conversions of both monomers in a relatively short period of time. In aqueous solutions, PAA-b-PCL diblock copolymers self-assembled into pH- and ionic strength- responsive micellar structures.