Morphology and phase behavior of the PET/HBA/HQ/TA copolyesters

作者：Lan Q; Cheng D; Yu Y; Bu HS^*

来源：Chemical Journal of Chinese Universities, 2003, 24(9): 1712-1716.

• liquid crystalline copolyester
• etching
• two-phase structure
• morphology

A series of etching methods were developed for the morphology observation of liquid crystalline copolyester. Phase behavior of the PET/HBA/HQ/TA copolyester was investigated by SEM after etching. A two-phase structure of these copolyesters was found. When PET molar fraction is lower than 50%, HBA/HQ/TA-rich-phase is a continuous phase, while the dispersion particles are PET-rich-phase. When PET molar fraction is equal to or greater than 50%, PET-rich-phase constitutes continuous phase, while HBA/HQ/TA-rich-phase forms dispersion particles which are composed of fibers. Therefore this PET/HBA/HQ/TA copolyester is not a random copolymer but a block one with long PET blocks.

• 出版日期2003-9-10
• 单位复旦大学