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A novel vinyl monomer, (S)-3-vinyl-2,2′-bis(methoxymethoxy)-1,1′-binaphthyl 2, was synthesized and underwent helix-sense-selective anionic polymerization to obtain helical polymers with an excess screw sense. The polymer ([α]36525 = −1610.0°) exhibited optical rotation as large as fourfold that of the monomer ([α]36525 = −356.0°). Poly-2 was confirmed to keep a prevailing helicity of backbone in solution...
Carboxyl-modified polystyrene (PS) nanospheres were used as sacrificial cores upon which cross-linked gelatin (CGA) was assembled through successive immobilization with poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA), forming polyelectrolyte complexes (PECs) stabilized through electrostatic interactions and hydrogen bonding. The PEC coronas, possessing hollow structure, of the PEC CGA@PDMAEMA...
Green light-emitting polyfluorenes were synthesized by Suzuki polycondensation via introducing dibenzothiophene-S,S-dioxide-(di-)tri-phenylamine (G 1 and G 2 ) moieties and dibenzothiophene-S,S-dioxide (SO) unit into the polyfluorene backbone, respectively. PF–SO–G copolymers show a high thermal stability and a moderate photoluminescence quantum yield in the range of 20–40%. The lowest...
In the Sn(Oct) 2 catalyzed bulk copolymerization of l-lactide (LLA) and a large amount of branching comonomer 2,2-bis(hydroxymethyl)butyric acid (BHB) (LLA/BHB/Sn(Oct) 2 ratio is 5:1:0.05, 135°C), low molecular weight of copolymers with inhomogeneous structure were generated. MALDI-TOF mass spectrum demonstrated that the lower molar mass fraction was dominated with the BHB homo-polycondensation...
A series of novel polyimides have been synthesized from the condensation of 5-(perfluorononenyloxy)isophthalic acid bis(4-aminophenyl) ester (IV 3 ) with various aromatic tetracarboxylic dianhydrides. For comparison, the polyimides containing the bis(4-aminophenyl) ester unit were prepared from terephthalic acid bis(4-aminophenyl) ester (IV 1 ) and isophthalic acid bis(4-aminophenyl)...
A series of novel perfluorononenyloxy group containing aromatic polyamides were synthesized by direct polycondensation of 5-(perfluorononenyloxy)isophthalic acid (I) with various aromatic diamines in N-methyl-2-pyrrolidone (NMP) containing lithium chloride. In this process, triphenyl phosphite and pyridine were used as condensing agents. All the aromatic polyamides were amorphous and readily soluble...
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