PET/60PABA热致型液晶共聚酯的合成与表征  

Synthesis and characterization of Thermotropic Liquid Crystalline Copolyesters PET/60PABA

作　　者：胡兆麟[1] 左志俊[1] 倪寒秋[1] 

机构地区：[1]中国石化仪征化纤股份有限公司研究院,江苏仪征211900

出　　处：《合成技术及应用》2013年第4期10-13,30,共5页Synthetic Technology & Application

摘　　要：将对羟基苯甲酸(PHB)的乙酰化产物对乙酰氧基苯甲酸(PABA)引入聚酯(PET)分子主链结构中,成功制备出共聚酯PET/60PABA,研究了聚合温度和催化剂浓度对共聚酯合成的影响。通过差示扫描量热(DSC)、X射线衍射(XRD)、超导核磁共振(NMR)、凝胶渗透色谱(GPC)、偏光显微镜(POM)和毛细管流变仪等手段对共聚酯的分子结构与液晶形态进行表征,结果表明,共聚酯PET/60PABA几乎为完全无规共聚,熔融状态下具有向列型热致液晶聚合物的典型特征。The thermotropic liquid crystalline copolyesters PET /60PABA were successfully perpared by intro-ducing P-hydroxybenzoic acid（PHB）units into the polyethylene terephthalate（PET）chain.The effects of ploymer-ization temperature and catalyst concentration on the copolyester synthesis were stuidied.The macromolecular struc-ture and the thermotropic liquid crystalline behavior of copolyesters were analyzed by DSC、XRD、NMR、GPC、POM and capillary rheometer.The results showed that PET /60PABA was a completely random copolymer,and it has a typical behavior of nematic thermotropic liquid crystalline in melt state.

关 键 词：热致液晶 共聚酯 合成 表征 

分 类 号：O633.14[理学—高分子化学]