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8328929 
Journal Article 
Synthesis and properties of thermotropic copoly(ester imide)s 
De Dong, W 
1996 
1 
Chinese Chemical Letters
ISSN: 1001-8417
EISSN: 1878-5964 
7 
7 
605-608 
English 
A series of copoly(ester imide)s is synthesized by thermal polycondensation of N,N'-hexane-1,6-diylbis(trimellitimide), p-hydroxybenzoic acid and diphenols with different structures. Their thermotropic liquid crystal properties are studied by DSC measurements and polarizing microscopy. It is found that the steric effect of nonlinear bisphenol modifiers is the most important factor in controlling the liquid crystallinity of the resulting copoly(ester imide)s.