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Main-chain liquid crystal (LC) PB-10-x n polyesters with number average degrees of polymerization (x n ) ranging from 12 to 50 were prepared. The PB-10 polyesters formed smectic I (SmI) LCs that consisted of 40-nm-thick lamellae stacked along the polymer chain direction. Although the LC lamella thickness (d LC ) was largely independent of x n , the isotropization temperature...
Spinnable main-chain PB-10 liquid crystal (LC) polyester was obtained for the first time by solid state polymerization after conventional melt condensation of 4,4′-biphenol and 1,10-dodecanoic acid. The smectic LC phase oriented uniaxially in the fibre and exhibited an X-ray diffraction pattern attributable to a C-centred monoclinic unit cell with a = 0.64 nm, b = 0.90 nm, c = 2.31 nm and β = 126°...
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