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Anionic polymerization of butyl acrylate with metal free initiator systems containing [1‐ tert ‐butyl‐4,4,4‐tris(dimethylamino)‐2,2‐bis[tris(dimethylamino)‐phosphor‐anylidenamino]‐2λ 5 , 4λ‐ 5 ‐catenadi(phosphazene)] base (P 4 ‐ tert ‐butyl‐phosphazene base)
Author(s) -
Börner H. G.,
Heitz W.
Publication year - 1998
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(19980901)199:9<1815::aid-macp1815>3.0.co;2-c
Subject(s) - chemistry , polymer chemistry , polymerization , butyl acrylate , deprotonation , methyl acrylate , methyl methacrylate , phosphazene , copolymer , polymer , organic chemistry , ion
The anionic polymerization of butyl acrylate initiated with a system consisting of the P 4 ‐ tert ‐butyl base and isobutyric acid methyl ester was investigated. The major fraction of the polymer contains a butoxy endgroup. The role of the non‐coordinated butanolate in initiating the polymerization reaction, its probable formation, and consequences effecting the polymerization are discussed. NMR investigation reveals that 5% of the isobutyric acid methyl ester are deprotonated by the P 4 ‐ tert ‐butyl base in the equilibrium state at −50°C whereas 11% of the acetic acid ethyl ester are deprotonated. The formation of block copolymers is observed on sequential addition of butyl acrylate and methyl methacrylate.