Citation: BAO Jingsheng, WANG Bing, XU Chaochou. STUDIES ON THE REGULAR COPOLYMERS OF POLY (1, 4-PHENYLENETEREPHTHALAMIDE)[J]. Chinese Journal of Polymer Science, ;1991, 9(1): 48-54. shu

STUDIES ON THE REGULAR COPOLYMERS OF POLY (1, 4-PHENYLENETEREPHTHALAMIDE)

Received Date: 2 November 1989

Two types of the regular copolymer of poly (1, 4-phenyleneterephthalamide) were synthesized by the low temperature solution polycondensation in NMP-CaCl2 solvent system, using the piperazine or 2,5-dimethylpiperazine as the third components introduced in the main chain of poly (1, 4-phenyleneterephthalamide). The properties of copolymers were characterized by IR, SEM, X-RAY diffraction, polarizing microscopy, TGA and solubilities. Experimental results showed that the copolymers had good solubility and thermal stability,the concentrated sulfuric and (～98%) solution of regular PPTA copolymers had liquid crystalline properties.
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