POLYMER LIQUID CRYSTAL EMULSION STABILIZED BY WATER SOLUBLE COPOLYMER, LIQUID CRYSTAL COMPOSITE FILM AND METHOD FOR PREPARING THEREOF
申请人:Soo-Jin Park
公开号:US20010001480A1
公开(公告)日:2001-05-24
A polymer liquid crystal emulsion includes a liquid crystal and a water soluble copolymer obtained by polymerizing a hydrophilic monomer with one or more hydrophobic monomers. The concentration of the hydrophobic monomer may be 14 to 25% by weight based on the combined weight of the hydrophobic monomer and the hydrophilic monomer. The hydrophobic monomer may be styrene, methyl methacrylate, vinyl acetate, acrylate or methacrylate. The hydrophilic monomer may be acrylamide, acrylonitrile or acryloylchloride. Preferably, the hydrophilic monomer is acrylamide or a derivative thereof and the hydrophobic monomer is styrene, methyl methacrylate or vinyl acetate. The liquid crystal may be a nematic liquid crystal formed of an azomethine compound or an azo compound. The water soluble copolymer, the liquid crystal and water may form a liquid crystal/aqueous polymer solution. In this case, the concentration of the liquid crystal in the liquid crystal/aqueous polymer solution is in the range of 50 to 70% by weight. A nematic curvilinear alignment phase film may be formed from the polymer liquid crystal emulsion and a pair of plates sandwiching the polymer liquid crystal emulsion.
一种聚合物液晶乳液,包括液晶和水溶性共聚物,所述水溶性共聚物是通过聚合亲水性单体和一个或多个疏水性单体得到的。疏水性单体的浓度可以基于疏水性单体和亲水性单体的总重量为14%至25%。疏水性单体可以是苯乙烯,甲基丙烯酸甲酯,醋酸乙烯,丙烯酸酯或甲基丙烯酸酯。亲水性单体可以是丙烯酰胺,丙烯腈或丙烯酰氯。最好的情况是亲水性单体是丙烯酰胺或其衍生物,疏水性单体是苯乙烯,甲基丙烯酸甲酯或醋酸乙烯。液晶可以是由偶氮甲烷化合物或偶氮化合物形成的向列型液晶。水溶性共聚物,液晶和水可以形成液晶/水性聚合物溶液。在这种情况下,液晶/水性聚合物溶液中液晶的浓度在50%至70%之间。可以通过将聚合物液晶乳液和夹持聚合物液晶乳液的一对板制成向列型曲面对齐相膜。