1217352-07-2Relevant academic research and scientific papers
A novel poly(p-phenylene) containing alternating poly(perfluorooctylethyl acrylate-co-methyl methacrylate) and polystyrene grafts by combination of atom transfer radical polymerization and Suzuki coupling processes
Durmaz, Yasemin Yuksel,Sahkulubey, Elif L.,Yagci, Yusuf,Martinelli, Elisa,Galli, Giancarlo
, p. 4911 - 4919 (2013/01/15)
A poly(p-phenylene) (PP), carrying perfectly alternating, well-defined poly(perfluorooctylethyl acrylate-co-methyl methacrylate) [P(FEA-co-MMA)] and polystyrene (PS) side chain grafts, was synthesized by the combination of atom transfer radical polymerization (ATRP) and Suzuki cross-coupling processes. First, dibromobenzene and diboronic ester functional macromonomers of P(FEA-co-MMA) and PS, respectively, were prepared by ATRP. In the second step, PP with lateral alternating P(FEA-co-MMA) and PS chains was synthesized by a Suzuki coupling reaction in the presence of Pd(PPh3)4 catalyst. The wetting behavior of the polymers was studied by measurements of the static contact angle Θ of thin films (200-400 nm thickness) using water and n-hexadecane as wetting liquids. The obtained fluorinated PP showed high static contact angles with both interrogating liquids, exhibiting simultaneously hydrophobic (Θw = 111°) and lipophobic (Θh = 67°) properties.
Perfectly alternating amphiphilic poly(p-phenylene) graft copolymers by combination of controlled radical polymerization and suzuki coupling processes
Sahkulubey, Elif L.,Durmaz, Yasemin Yuksel,Levent Demirel,Yagci, Yusuf
, p. 2732 - 2738 (2011/10/09)
The preparation of amphiphilic poly(p-phenylene) (PP) possessing completely and perfectly alternating hydrophilic poly(ethylene oxide) (PEO) and hydrophobic polystyrene (PS) side chains is described. First, PS macromonomer with suitable functionality for polyphenylation was prepared by atom transfer radical polymerization (ATRP). The antagonist macromonomer, PEO, was synthesized by etherification reaction. Both macromonomers were reacted in the final stage via Suzuki cross coupling in the presence of Pd(PPh3)4 as catalyst to form the desired amphiphilic graft copolymer (Mn: 32 400 g/mol and Mw/ Mn: 2.28). The intermediates obtained in various stages and graft copolymers were characterized by 1H NMR and IR analysis. The optical absorption properties of the polymer were monitored with UV, and an additional absorption at around 280-320 nm evidenced the formation of PP chain. Thermal properties of PP were investigated by DSC. The thermogram displayed two transitions at 51.98 and 89.60 °C., indicating the presence of both PEO and PS structures in the copolymer. The perfectly alternating hydrophilic PEO and hydrophobic PS side chains were observed by AFM measurements to nanophase-separate in thin films.
