Two liquid crystal monomers

cholesteryl 10-undecylenate (M1)

and cholesteryl 4-(10-undecylenoyloxy)-benzoate (M2)

and their respective side-chain liquid crystal homopolymers (P1

P2) were synthesized．Their liquid crystal properties were characterized by POM and DSC method．M1 could form sematic liquid crystal and cholesteric liquid crystal

while M2-only cholesteric liquid crystal. The Polymers

P1 and P2

exhibited sematic liquid crystal behavior. The results also indicated that

because of the structure of 1.4-COO-Ar-COO-in M2 and P2

the isotropization tempretures of the liquid crystalline M2 and P2 were higher than those of M1 and P1

respectively

and the temprature range of LC phases of M2 was also wider than that of M1．Homopolymer P1

was applied in the capillary column gas chromatography as a novel stationary phase and showed ideal separating selectivity．A mixture of anthracene

phenanthrene and acenaphene and a mixture of dichlorobenzene isomers were well separated．