1 research outputs found
Controlled Copolymerization of 1‑Octene and (Meth)acrylates via Organotellurium-Mediated Living Radical Polymerization (TERP)
Copolymerization of 1-octene and (meth)Âacrylates, such
as methyl
acrylate, trifluoroethyl acrylate (TFEA), methyl methacrylate, and
trifluoroethyl methacrylate, under organotellurium-mediated living
radical polymerization (TERP) conditions was investigated. Polymerization
under thermal conditions gave copolymers with considerably broad molecular
distributions (polydispersity index [PDI] > 1.45), whereas that
under
photoirradiation greatly increased the PDI control. Structurally well-controlled
copolymers with number-average molecular weights (<i>M</i><sub>n</sub>) of 3000–18 000 and low PDIs (1.22–1.45)
were obtained. Addition of Brønsted acids, such as 1,3-C<sub>6</sub>H<sub>4</sub>[CÂ(CF<sub>3</sub>)<sub>2</sub>OH]<sub>2</sub> and hexafluoroisopropanol, increased the insertion of 1-octene into
the copolymer. The molar fraction of 1-octene (MF<sub>oct</sub>) reached
∼0.5 in the copolymerization using TFEA as an acrylate monomer
and excess amount of 1-octene in the presence of the acid. The copolymer
was used as a macro-chain-transfer agent for the synthesis of block
copolymers. This is the first example of the use of this type of copolymer
as a macro-chain-transfer agent in the controlled synthesis of block
copolymers