Liquid crystallinity in polythioethers of 1,4-bis(mercaptomethyl)benzene (MB) and 4,4′-bis(mercaptomethyl)biphenyl (MBP) with α,ω-dibromo-n-alkanes and polythioesters of MB and MBP with n-alkanedioyl dichlorides, Liquid Crystals, 35:6, 689-694To link to this article: http://dx.Polythioethers consisting of 1,4-bis(mercaptomethyl)benzene (MB) with a,v-dibromo-n-alkanes (An, the number of methylene groups, n55-8) (MB-An) and 4,49-bis(mercaptomethyl)biphenyl (MBP) with An (MBP-An), and polythioesters containing MB and MBP with n-alkanedioyl dichlorides (AMmC, the number of methylene groups, m55-8) (MB-AMmC and MBP-AMmC) were synthesised and their phase transition behaviour investigated using differential scanning calorimetry, polarising optical microscopy and X-ray diffraction. The MPB-An thioether polymers exhibited a nematic phase with good thermal stability but the MB-An thioether and MB-AMmC and MBP-AMmC thioester polymers exhibited no mesophase. The dependence of liquid crystalline behaviour on the chemical structure of the polymers is discussed.
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