In-chain functionalized syndiotactic 1,2-polybutadiene by a Ziegler–Natta iron(iii) catalytic system

Abstract

In-chain functionalized syndiotactic 1,2-polybutadiene through copolymerization of 1,3-butadiene and 1-substituted 1,3-diene comonomer by a Ziegler–Natta iron(iii) catalytic system.

Copolymerization of 1,3-butadiene with phenyl/phenethyl substituted 1,3-butadienes: a direct strategy to access pendant phenyl functionalized polydienes

“…were prepared in high yields under mild conditions via Wittig reaction according to previously reported protocol. 36 Further purication by ash column chromatography was undertaken to obtain the readily polymerizable comonomers. All the chemical structures and purities were conrmed by 1 H NMR and 13 C NMR.…”

“…The PSBD comonomers ( Chart 1 ), including 1-phenyl-1,3-butadiene (PBD), 1-phenethyl-1,3-butadiene (PEBD), 1-(4-methoxylphenyl)-1,3-butadiene ( p -MEPBD), 1-(2-methoxylphenyl)-1,3-butadiene ( o -MEPBD), 1-(4- N , N -dimethylaminophenyl)-1,3-butadiene ( p -DMPBD), were prepared in high yields under mild conditions via Wittig reaction according to previously reported protocol. 36 Further purification by flash column chromatography was undertaken to obtain the readily polymerizable comonomers. All the chemical structures and purities were confirmed by 1 H NMR and 13 C NMR.…”

“…The monomers of 1-(4-methoxylphenyl)-1,3-butadiene, 1-(2-methoxylphenyl)-1,3-butadiene, and 1-(4- N , N -dimethylaminophenyl)-1,3-butadiene were prepared according to previous reports. 36 …”

“…The monomers of 1-(4-methoxylphenyl)-1,3butadiene, 1-(2-methoxylphenyl)-1,3-butadiene, and 1-(4-N,Ndimethylaminophenyl)-1,3-butadiene were prepared according to previous reports. 36 The number average molecular weights (M n ) and molecular weight distributions (M w /M n ) of polymers were measured at 30 C by using gel permeation chromatography (GPC) equipped with a Waters 515 HPLC pump, four columns (HMW 7 THF, HMW 6E THF Â 2, HMW 2 THF), and a Waters 2414 refractive index detector. Tetrahydrofuran (THF) was used as eluent at a ow rate of 1.0 mL min À1 .…”

Preparation of functionalized poly(1-butene) from 1,2-polybutadiene via sequential thiol-ene click reaction and ring-opening polymerization

“…; and hence the goal of obtaining PAOs with improved hydrophilicity levels and developing functionalized PAOs is being pursued. [8][9][10] Although copolymerization of a-olen with polar monomers is a straightforward strategy to access a functionalized PAO, very few relevant catalytic systems are currently available due to the easy deactivation of active species by heteroatoms in polar comonomers. [10][11][12][13] Therefore, post-functionalization has become considered to be a reliable and efficient alternative strategy.…”