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Isoprene (co)polymers with glycidyl methacrylate via bimolecular and unimolecular nitroxide mediated radical polymerization
Author(s) -
ContrerasLópez David,
AlboresVelasco Martha,
SaldívarGuerra Enrique
Publication year - 2017
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.45108
Subject(s) - isoprene , glycidyl methacrylate , polymer chemistry , monomer , polymerization , chemistry , nitroxide mediated radical polymerization , methyl methacrylate , radical polymerization , hydroxylamine , copolymer , radical initiator , polymer , organic chemistry
Homo and copolymerization of isoprene with small amounts (1–10 wt %) of glycidyl methacrylate (GMA) are conducted using controlled‐living radical polymerization mediated by nitroxides at 120 °C and 1170 kPa in solution with toluene (30 wt % solids). N ‐tert‐butyl‐ N ‐(2‐methyl‐1‐phenylpropyl)‐O‐(1‐phenylethyl) hydroxylamine is successfully used as a control agent (unimolecular process) although other controllers are also tested (TIPNO and OH‐TEMPO in a bimolecular process using BPO as initiator). Chain extension experiments demonstrate the livingness of the synthesized materials. Several additives (acetic anhydride, camphorsulfonic acid and glucose) prove effective in accelerating the reactions. All the successful polymerizations result in first‐order kinetics with respect to the monomer, yielding average molecular weights ( M n ) of about 75% compared to the theoretical M n ( M n , theo ) with dispersities ( Ð ) ranging from 1.2 to 1.7 depending on the agent used for control. Controlled grafts of poly(isoprene‐co‐GMA) are also attached to polyisoprene via nitroxide chemistry. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45108.