ehavior of photocrosslinking reaction of side-chain liquid crystalline copolymer P(MPAEB-co-VBC)and P(MPAHB-co-VBC) was investigated.When the sample membrane was irradiated by ultraviolet ray at room temperature for 20 minutes

the percent of gel for quenched membrane was higher than unquenched one for both P (MPAEB-co-VBC)and P(MPAHB-co-VBC)

but did not change for homopolymer.When the temperature of samples was changed from room temperature to 100℃

there was not dear difference in percent of gel for quenched P(MPAEB-co-VBC)and P(MPAEB-co-VBC) membranes.It was concluded from these obsrcations

that because of ordered arrangement of mesogen grous in L.C.copolymer

physicocrosslinking macromolecules

which had domain structre

was formed.The domain structure could influence aggregational condition of cinnamate groups in the L.C. polymer chains and resulted in different characteristics from amorphous one.