摘要
将对羟基苯甲酸(PHB)单元引入聚对苯二甲酸乙二酯(PET)中,合成液晶共聚酯,1步法工艺优于2步法。就1步法工艺研究缩聚温度、时间、催化剂用量及PHB含量对PET/PHB共聚酯对数比浓粘数的影响。用偏光显微镜研究结果表明,PET/PHB共聚酯呈丝纹形结构,属向列型液晶。用差示扫描量热仪研究的结果也反映出向列型液晶的特征。
P- hydroxybenzoic acid (PHB) unit was introduced into the polyethylene terephthalate chain in order to form liquid crystalline segment. It was confirmed that one - step process was obviously superior to two - step process. The effects of polycondensation temperature, reaction time, concentration of catalyst, content of PHB on the inherent viscosity of PET/ PHB copolyesters were studied in the one - step process. The liquid crystalline properties of the PET/PHB copolyesters were characterized by means of polarized light microscope and differential scanning calorimeter.
出处
《合成树脂及塑料》
CAS
2000年第3期13-16,共4页
China Synthetic Resin and Plastics
基金
聚合反应工程国家重点实验室开放基金
