A novel thermally stable and low dielectric poly(binaphthylene ether) (2) has been developed.
Polymer 2 was easily prepared by oxidative coupling polymerization of 2,2‘-bis(1-naphthyloxy)-1,1‘-binaphthyl (1) with FeCl3 as an oxidant. This polymerization produced regiocontrolled polymer 2 with a
number-average molecular weight of 14 000 Da and a molecular weight distribution of 3.3. The 5% weight
loss and glass transition temperatures of polymer 2 were 520 and 301 °C, respectively. The dielectric
constant of polymer 2 at 1 MHz was directly measured from the capacitance as 2.50. The modulus and
hardness of polymer 2 were determined as 9.8 and 0.42 GPa.
A direct oxidative carbonylation procedure of Bisphenol A to polycarbonate catalyzed with efficient Pd complex systems has been developed. Pd/2,2′‐bipyridyl complexes possessing 6,6′‐dimethyl substituents, Pd/2,2′‐biquinoline complexes, and dinuclear Pd complexes bridged with a pyridylphosphine ligand were found to give higher molecular weights and yields than conventional Pd catalyst systems. Highest molecular weight (M̄n = 5 600, M̄w = 12 900) and yield (86%) were obtained using the Pd/6,6′‐dimethyl‐2,2′‐bipyridyl complex system.
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