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Preparation of Poly( N ‐Vinylcaprolactam) (NVCL) and Statistical Copolymers of NVCL with Variable Cloud Point Temperature by Using A Trithiocarbonate RAFT Agent
Author(s) -
PonceVargas Sandra M.,
CortezLemus Norma A.,
LiceaClaveríe Angel
Publication year - 2013
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201200045
Subject(s) - copolymer , comonomer , raft , cloud point , polymer chemistry , methacrylic acid , dispersity , methacrylate , aqueous solution , acrylate , chemistry , polymer , lower critical solution temperature , materials science , organic chemistry
Preparation of PNVCL controlling its molecular weight and maintaining low dispersities by using a trithiocarbonate RAFT agent was achieved. Typical RAFT kinetics were not observed, nevertheless the prepared polymers were reactivated to grow a second hydrophobic poly(hexyl acrylate) block. A series of statistical copolymers of NVCL with N ‐vinyl pyrrolidone, n‐hexyl acrylate, methacrylic acid, 2‐(diethylamino)ethyl methacrylate and 2‐(methacryloyloxy)benzoic acid with controlled dispersity were also prepared. By this copolymerization method the cloud point temperature of PNVCL was varied from 27 °C to 42 °C depending on comonomer type, content and pH of the aqueous solution.