摘要:
A ferroelectric, liquid-crystalline polymer is composed of repeating units of the formula I ##STR1## in which Y=H or CH.sub.3a=an integer from 6 to 12M=a group selected from the formulae which follow: ##STR2## in which --R.sup.2 =--CH.sub.3 or --Cl and b=an integer from 1 to 10. The abovementioned polymer has remarkably short response times. The polymer forms, alone or mixed with other LC components, an orthogonal smectic phase. It is possible to use this phase in the electroclinic mode.
摘要:
A ferroelectric, liquid-crystalline polymer is composed of repeating units of the formula (I) ##STR1## in which Y=H, CH.sub.3 or F,R.sup.1 =a radical having at least two chiral centers such as for example ##STR2## a=2 to 20, preferably 6 to 12, b,c,d,e and f=0 or 1 with the proviso that d+e+f=2 or 3,A.sup.1,A.sup.2 and A.sup.3 =for example, 1,4-phenylene, cyclohexylene or 2,5-pyrimidinediyl,M.sup.2 and M.sup.3 =CO--O, O--CO, CO--S, S--CO, CH.sub.2 --O, O--CH.sub.2, and ##STR3## These liquid-crystalline polymers have short response times and resistance to mechanical stresses.They can be prepared by free-radical polymerization.
摘要翻译:铁电液晶聚合物由式(I)的重复单元组成,其中Y = H,CH 3或F,R 1 =具有至少两个手性中心的基团,例如 a = 2至20,优选6至12,b,c,d,e和f = 0或1,条件是d + e + f = 2或3,A1,A2和A3 =例如,1,4-亚苯基 ,亚环己基或2,5-嘧啶二基,M2和M3 = CO-O,O-CO,CO-S,S-CO,CH2-O,O-CH2和这些液晶聚合物具有较短的响应时间 和耐机械应力。 它们可以通过自由基聚合制备。
摘要:
A ferroelectric, liquid-crystalline polymer is composed of repeating units of the formula (I) ##STR1## in which Y.sup.1 =H, CH.sub.3 or FY.sup.2 =H or FR.sup.1 = ##STR2## or an achiral alkyl having 2 to 16 carbon atoms, and R.sup.3 =H or CH.sub.3R.sup.2 =CH.sub.3, Cl or CNg and h=an integer from 0 to 10a=2 to 20, preferably 6 to 12b,c,d,e and f=0 or 1, where d+e+f=2 or 3A.sup.1,A.sup.2 and A.sup.3 =for example, 1,4-phenylene in which one or two hydrogen atoms may be substituted by F, Cl and/or CN, 1,4-cyclohexylene andM.sup.1,M.sup.2 and M.sup.3 =for example, CO--O or O--CO.These liquid-crystalline polymers have short response times and high resistance to mechanical stresses. They can be prepared by free-radical polymerization.
摘要翻译:PCT No.PCT / EP89 / 00745 Sec。 371日期1991年1月3日 102(e)日期1991年1月3日PCT Filed 1989年6月29日PCT公布。 出版物WO90 / 00584 日本1990年1月25日。铁电液晶聚合物由式(I)的重复单元(*化学结构*)组成,其中Y 1 = H,CH 3或F Y 2 = H或F R 1 =(* CHEMICAL 结构*)或具有2至16个碳原子的非手性烷基,并且R 3 = H或CH 3 R 2 = CH 3,Cl或CN g,h = 0至10的整数a = 2至20,优选6至12b,c ,d,e和f = 0或1,其中d + e + f = 2或3,A1,A2和A3 =例如,其中一个或两个氢原子可以被F,Cl和/ 或CN,1,4-亚环己基和M1,M2和M3 =例如CO-O或O-CO。 这些液晶聚合物具有较短的响应时间和高的机械应力抵抗力。 它们可以通过自由基聚合制备。