Abstract
ABSTRACT Reinforcing the stability of aliphatic carbonate is an intractable problem that the mesomorphism of the material still needs to solve today. Here, novel main-chain liquid crystal compounds with mesomorphism are designed via the bulk ring-opening polymerisation to improve the stability and mesomorphic properties. The compounds were synthesised by bulk copolymerisation reaction of the monomers and initiator. The monomers of the 1, 3-trimethylene carbonate and the d, l-lactide were initiated by the diosgenyl derivative, without adding any catalyst. The chemical structures of obtained compounds were characterised by FT-IR and 1H NMR. The mesomorphic behaviour of the materials was determined by polarising optical microscopy and X-ray diffraction measurement. The thermal performance was investigated by differential scanning calorimetry and thermo gravimetric analyser. The results indicated that the phase transition temperature of the obtained compounds can be adjusted by the variation content of the monomers, and the compounds displayed an enantiotropic smectic phase in the room-temperature.
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