关键词: 苯二甲酸P, 酯, 液晶, 甲氧基, 取代基, 结构与性能关系, 熔点

A new series of 1,4-bis[(p-methoxyphenoxy)carbonyl] benzene with different lateral substitutents were designed and synthesized. Their mesomorphic behavior was examined using differential scanning calorimery (DSC) and polarized optical icroscopy (POM).It was found that introduction a lateral subsituten on center phenylene of 1,4-bis [(p-methoxyphenoxy)carbonyl] benzene destros the symmetry of the molecule and results in a decrease in melting point and learing point. A proper lateral substitutent such as methyl, bromo or hydroxyl group, is favorable for the formation of a liquid crystal phase.

Key words: BENZENEDICARBOXYLIC ACID P, ESTERS, LIQUID CRYSTAL, METHOXY GROUP, SUBSTITUENT GROUP, STRUCTURE AND PROPERTY CORRELATION, MELTING POINT