Macromonomers, telechelics and more complex architectures of PMA by a combination of biphasic SET-LRP and biphasic esterification

作者：Moreno Adrian; Jezorek Ryan L; Liu Tong; Galia Marina; Lligadas Gerard; Percec Virgil^*

来源：Polymer Chemistry, 2018, 9(14): 1885-1899.

DOI：10.1039/c8py00150b

The high bromine chain end functionality of polyacrylates synthesized by single electron transfer living radical polymerization (SET-LRP) mediated by TREN in a biphasic acetone-water mixture containing Cu(II) Br-2 can be exploited to introduce specific functional groups to the chain-ends of these polymers. Here, the alpha-bromoester end groups of poly(methyl acrylate) (PMA) synthesized in this biphasic SET-LRP system using non-activated Cu(0) wire as catalyst were reacted also under heterogeneous biphasic conditions with potassium acrylate to yield PMA macromonomers and telechelics with alpha- and alpha,omega-acrylate chain ends. The reagents used in both steps are air insensitive and inexpensive. 500 MHz H-1 NMR, GPC and MALDI-TOF analyses in combination with the thio-bromo "click" reaction were used to confirm the high efficiency of this two-step protocol. The reactive nature of these macromonomers by the preparation of a PMA-g-PMA more complex architecture was also demonstrated.

• 出版日期2018-4-14