PET／PHB热致液晶共聚酯序列结构的研究

STUDY OV THE SEQENCE STRUCTURE OF PET/PHB THERMOTROPIC LIQUID CRYSTALLINE COPOLYESTERS

用氢谱核磁共振技术，借助于计算机分峰方法，全面研究了ＰＥＴ／ＰＨＢ共聚酯的序列结构。讨论了组成、切片粘度（ＰＥＴ）、醋酸酐用量、缩聚时间等因素对共聚酯序列结构的影响。结果表明，ＰＨＢ含量小于７０ｍｏｌ％时，ＰＥＴ／ＰＨＢ共聚酯均为高度无规结构。

In this paper,the sequence structure of PET/PHB was systematically studied with the use of 1H-NMR and the separating overlap peaks by computer simulation.We especially concentrated our study on the influence of various factors,such us the composition,the viscosity of PET,the quantity of acetic anhydride and the polycondensation time etc.,On the sequence structure of PET/PHB.The experimental results showed that the PET/PHB copolyesters were all random structure when the PHB content less than 7.0 mol%.