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Synthesis of the model macroinitiators of free radical polymerization and their application for the preparation of block copolymers
Author(s) -
Kalyuzhnaya Elena,
Villareal Gladys De Los Santos,
Herrera Luis E. Elizalde,
Santos Ramiro Guerrero
Publication year - 1996
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/(sici)1097-4628(19960808)61:6<1055::aid-app20>3.0.co;2-u
Subject(s) - polymer chemistry , benzophenone , copolymer , polymerization , radical polymerization , methyl methacrylate , styrene , end group , anionic addition polymerization , molar mass distribution , chemistry , materials science , polymer , organic chemistry
A series of polystyrenes having low molecular weight (4600–23,100) and narrow molecular weight distribution and functionalized with a benzophenone group at one or both ends of the chain have been prepared through anionic polymerization. Then the terminal benzophenone groups have been transformed into 1,2‐bis(trimethylsilyloxy)tetraphenylethane (or benzopinacolate) groups by the duplication reaction with free benzophenone in the presence of chlorotrimethylsilane and hexamethylphosphorous triamide (HMPT) or hexamethylphosphoramide (HMPA), producing model thermal macroinitiators of free radical polymerization with well‐defined structure. Polymerization of MMA initiated by these macroinitiators was carried out yielding poly(styrene‐ b ‐methyl‐methacrylate) (PS‐ b ‐PMMA). © 1996 John Wiley & Sons, Inc.