摘要
借酯交换反应,以对羟基苯甲酸、对苯二甲酸和双酚A为单体通过淤浆聚合制备出6个低分子量芳香族热致液晶样品,即PHBA/TPA/BPA共聚酯.由于此单体含量不同的共聚酯样品在适当的溶剂中有较好的溶解性,故能进行许多表征.根据实验结果还得到了表示转变温度一组成关系的相图,并进行了讨论.
amples of low molecular weight and thermotropic liquid Crystals of aromatic copolyesters are prepared by a slurry polycondensation of three monomers,i' e. p-hydrobenzoic acid, temphthalic add and bisphenol A. These copolymers obtained from the reaction of ester exchange are called as PHBA/TPA/BPA copolyesters. Many characterizahons for samples with different composihon can be carried out house of their relatiVely good solubilities in proper solvents. The phase diagram expressing the transition temperature-composition for these copolyesters is obtained and discussed.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1994年第4期405-412,共8页
Acta Polymerica Sinica
基金
四川省科委资助
关键词
芳香族
热致液晶
PHBA
TPA
BPA
PHBA/TPA/BPA copolyester,Thermotropic LC polymer,Solubility,Molecular weight distribution,Phase diagram