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Synthesis of Well‐Defined Poly(methyl methacrylate) by a Normal Atom‐Transfer Radical Polymerization Procedure with a New Catalyst, Cuprous N , N ‐Diethyldithiocarbamate
Author(s) -
Li Peng,
Qiu KunYuan
Publication year - 2002
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/macp.200290009
Subject(s) - polymer chemistry , polymerization , chemistry , monomer , atom transfer radical polymerization , chain transfer , methyl methacrylate , radical polymerization , bulk polymerization , living polymerization , catalysis , chain termination , living free radical polymerization , molar mass distribution , polymer , organic chemistry
Cuprous N , N ‐Diethyldithiocarbamate, Cu(S 2 CNEt 2 ), was successfully used as a catalyst in p ‐toluenesulfonyl chloride initiating atom‐transfer radical polymerization of methyl methacrylate in both bulk and solution in a heterogeneous system with 2,2′‐bipyridine as the ligand. The polymerization was controlled under various concentration ratios of the monomer to initiator, the molecular weight matched the predetermined value, and the molecular weight distribution of resulting polymers was quite low ( M w / M n < 1.10). Solvents with different polarity had no significant effect on the living nature of this process. Well‐defined poly(methyl methacrylate) with α ‐ p ‐toluenesulfonyl and ω ‐diethylthiocarbamoylthiyl group was obtained. That the polymer chain was capped with an ultraviolet light sensitive group was confirmed by chain extension reactions.Dependence of M n and M w / M n on the monomer conversion of bulk polymerization of MMA at 80 °C with p ‐TsCl/Cu(S 2 CNEt 2 )/bpy initiation system. Conditions the same as in Figure 5.