采用溶液聚合法,以4,4'-二羟基联苯、5-氟-1-戊醇、甲苯-2,4-二异氰酸酯(2,4-TDI)及三种不同链长的脂肪族二元醇为原料制备了一系列的联苯型液晶聚氨酯(LCPU).采用红外光谱(FT-IR)、差示扫描量热(DSC)、偏光显微镜(POM)和X射线衍射(WAXD)等手段对聚合物进行表征.结果表明,这类联苯型的LCPU的熔点(Tm)随着聚合物分子链中小分子二元醇链长的增加而降低,而各向同性温度(Ti)则变化不大;POM观察表明,这一系列的聚合物均为热致性向列型液晶.其液晶态温度区间在90℃～207℃;其广角X射线衍射图在2θ≈25°有尖锐的衍射峰.
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