الفهرس | Only 14 pages are availabe for public view |
Abstract The text of the work presented in this thesis lies in three sections. Section 1: Synthesis of thermotropic liquid crystalline poly(arylidene – ether )s containing 4-tertiary butyl cyclohexanone moiety linked with polymethylene spacers. The monomers namely: 4,4`-diformyl-α,ω- diphenoxyalkanes 10a-f and 4,4`-diformyl-2,2`- dimethoxy-α,ω- diphenoxyalkanes 11a-f were prepared by interaction of one mole of dihaloalkanes with two moles of the sodium salt of, 4- hydroxybenzaldehyde or 4-hydroxy-3-methoxybenzaldehyde respectively in DMF. |