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This paper describes a new method for the dispersing and surface-functionalization of metal oxide magnetic nanoparticles (10 nm) with poly(allylamine) (PAA). In this approach, Fe3O4 nanoparticles, prepared with diethanolamine (DEA) as the surface capping agent in diethyleneglycol (DEG) and methanol, are ligand exchanged with PAA. This method allows the dispersing of magnetic nanoparticles into individual...
A series of newly designed polyimides, composed of aromatic polyimide backbones and methylene side chains with terminal 4-cyanobiphenyl groups, were synthesized based on the polycondensation of 3,3′,4,4′-biphenyl tetracarboxylic dianhydride (BPDA) with 2,2′-bis{ω-[4-(4-cyanophenyl)phenyoxy-n-alkoxycarbonyl]}-4,4′-biphenyl diamine (nCBBP, where n is the number of methylene units in the side chains)...
Two new asymmetric odd-numbered main-chain liquid crystalline (LC) polyesters (BPE-Cn) were synthesized through the condensation polymerization of A–B type asymmetric α,ω-carboxylic acid–hydroxyl terminated monomers with odd-numbers of methylene units in the spacers (BPCA-Cn-PmOH, where n=7 and 9). The phase behaviors and structures of these odd-numbered BPE-Cn samples were characterized using the...
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