摘要
以对-乙酰氧基苯甲酸(PABA),4,4′-二乙酰氧基二苯基丙烷(ABPA)和对苯二甲酸(TPA)为原料,采用熔融缩聚法合成了热致性液晶共聚酯PABA-ABPA-TPA。测定了样品的粘度,求得其相对分子质量,并用DSC、偏光显微镜、X射线衍射、红外光谱、核磁共振等手段对其进行了表征,证明该共聚酯为向列型液晶,在一定的温度范围内有很好的液晶性。在单体的精制和共聚酯的制备方面探索了新的方法。
A series samples of thermotropic liquid crystalline copolyesters of p-acetoxybenzoic acid (PABA), acetoxybiphenol A and therephalic acid were synthesized by melting polycondensation .The TLCPs were characterized by viscosity, DSC, polarized microscope, X-ray diffraction, IR and NMR. The experimental results show that the copolyester exhibits nematic liquid crystallinity. In a certain scope of temperature, the copolyester shows good liquid crystallinility. The experiment explored new way at the side of purification of monomer and polymerization of copolyester.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2005年第1期129-132,共4页
Polymer Materials Science & Engineering
基金
山西省自然科学基金项目(20011017)
