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采用Ｘ射线衍射仪、示差扫描热分析仪及偏光显微镜对热致液晶聚酯酰亚胺进行了研究。ＤＳＣ曲线上都有明显的玻璃化转变（Ｔ＿ｇ）及两个熔融峰（Ｔ＿（ｍ１）、Ｔ＿（ｍ２）），表明聚合物具有明显的液晶性；ＷＡＸＤ曲线上在２θ＝２０°左右可观察到较强的衍射峰，在２θ＜１３°的小角范围内也可观察到多个比较尖锐的衍射峰，前者表明分子链横向排列，间距在４．５～５Ａ，后者表明聚合物分子径向采取较完美的层状超分子结构顺序排列，以上结果证实了共聚物是近晶型结构；偏光显微镜下观察到了棒状或小锥状的近晶型液晶的典型织构，进一步支持了ＷＡＸＤ所得结论。
The thermotropic liquid crystalline polyester imide was investigated by X-ray diffractometer, differential scanning calorimeter and polarized light microscope. The glass transition (T_g) and the two melting peaks (T_ (m1), T_ (m2)) on the DSC curve show that the polymer has obvious liquid crystallinity. The WAXD curve can be observed at 2θ = 20 ° To the strong diffraction peaks, more sharp diffraction peaks can be observed in the small angle range of 2θ <13 °. The former indicates that the molecular chains are arranged laterally at intervals of 4.5-5A, which indicates that the polymer molecular diameter To the more perfect layered supramolecular structure arranged in order, the above results confirmed that the copolymer is a smectic structure; observed under a polarizing microscope rod or small cone-shaped smectic liquid crystal typical texture, and further support WAXD income in conclusion.