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Synthesis of Poly(vinyl acetate) Nanogels by Xanthate‐Mediated Radical Crosslinking Copolymerization
Author(s) -
Poly Julien,
Wilson D. James,
Destarac Mathias,
Taton Daniel
Publication year - 2008
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200800542
Subject(s) - xanthate , vinyl acetate , copolymer , polymer chemistry , vinyl alcohol , adipate , chemistry , molar mass , organic chemistry , polymer
Poly(vinyl acetate) (PVAc) nanogels are synthesized by a radical crosslinking copolymerization (RCC) in solution of vinyl acetate and divinyl adipate (DVA) or 2,4,6‐tris(allyloxy)‐1,3,5‐triazine (TAT) as the crosslinker, in the presence of a xanthate as a reversible chain transfer agent. Higher concentrations of crosslinker and lower concentrations of xanthate produce PVAc nanogels of higher molar masses, for a given concentration of xanthate and for a fixed concentration of crosslinker, respectively. The xanthate end‐groups allow for the synthesis of ‘second generation’ nanogels through a subsequent RCC from precursors. The chemical cleavage of the crosslinks yields individual poly(vinyl alcohol) chains, which attests that the length of the constitutive chains is controlled by the xanthate.