LI Zi-fa, ZHANG Zi-yong, FU Xang-yang, ZHOU Qi-feng. STUDY OF A SERIES OF AROMATIC COPOLYESTERS WITH X-SHAPED AND ROD-SHAPED MESOGENS IN THE MAIN CHAIN[J]. Acta Polymerica Sinica, 1992,(5):611-618.
LI Zi-fa, ZHANG Zi-yong, FU Xang-yang, ZHOU Qi-feng. STUDY OF A SERIES OF AROMATIC COPOLYESTERS WITH X-SHAPED AND ROD-SHAPED MESOGENS IN THE MAIN CHAIN[J]. Acta Polymerica Sinica, 1992,(5):611-618.DOI:
were copolymerized into the polymer chains. A series of aromatic copolyesters were synthesized by solution polycondensation at the refluxing temperature. The copolymers were all thermotro-pic liquid crystalline. The transition temperatures of the copolymers regularly changed with the substituents in the X-shaped mesogens and with the length of flexible spacers between two mesogens in the chain.