申请人:Idemitsu Kosan Co., Ltd.
公开号:US05380915A1
公开(公告)日:1995-01-10
A liquid-crystalline copolymer comprising the repeating units represented by the following general formulas ##STR1## wherein each of r and p is an integer of 2 to 5, q is an integer of 0 to 3, m is an integer of 1 to 20, and R.sup.1 is ##STR2## R.sup.2 being --COOR.sup.3, --OR.sup.3 or --OCOR.sup.3 R.sup.3, ##STR3## each of R.sup.4 and R.sup.5 being --CH.sub.3 or a halogen atom, each of a and d being an integer of 0 to 10, b being an integer of 0 or 1, with the proviso that d is not 0 when R.sup.5 is --CH.sub.3, the repeating units [I] and [II] being present in the liquid-crystalline copolymer in a substantial molar ratio [I]:[II] of 1:1, exhibits ferroelectricity even at a temperature neighboring room temperature and having a high response speed to changes of external electric fields.
一种液晶共聚物,包括由以下通式表示的重复单元:##STR1## 其中r和p均为2至5的整数,q为0至3的整数,m为1至20的整数,R.sup.1为##STR2## R.sup.2为--COOR.sup.3,--OR.sup.3或--OCOR.sup.3 R.sup.3,##STR3## R.sup.4和R.sup.5均为--CH.sub.3或卤素原子,a和d均为0至10的整数,b为0或1,但当R.sup.5为--CH.sub.3时,d不为0,重复单元[I]和[II]在液晶共聚物中以实质摩尔比[I]:[II]为1:1存在,即使在接近室温的温度下也表现出铁电性,并对外部电场的变化具有高响应速度。