The acetyl degree of substitution( A DS ) of AEC was determined by NMR, IR. The relationship between thermotropic liquid crystalline properties, texture and A DS of AEC was studied by means of DSC, HSPLM.

• 用NMR、IR测定了AEC的乙酰取代度（A－DS），用DSC、HSPLM研究了AEC的热致液晶性能、织构与A－DS的关系。