【摘要】 采用PTA路线制得PHB-PET共聚酯,通过核磁(NMR)分析来表征共聚产物的分子结构,并计算出共聚酯产物的序列结构。NMR表征结果表明:PHB-PET共聚酯中PHB与PET为无规共聚,PHB自聚比率0.06左右,自聚分子数均序列长度在1.06左右,且由于PHB的反应活性较低,未能完全参与和PET的共聚反应。用PHB制得4,4′-对苯二甲酰二氧二苯甲酸(TOBA),在TOBA-PET体系中,自聚比率0.1左右,自聚分子数均序列长度在1.11左右。更多还原

【Abstract】 Copolyester(PHB-PET)modified by PHB was synthesized by direct esterification of PTA.The molecular structure of copolyester was signed and the sequence structure was calculated through analysis of NMR.It indicated that:PHB and PET were random copolymerization.The rate of PHB self-polymerization was about 0.06, and the number average length of self-polymer sequence was about 1.06 in copolyester(PHB-PET).For low reactivity, not all of PHB reacte with PET in copolymerization.The rate of PHB self-polymerization was about 0.1,and the number average length of self-polymer sequence was about 1.11 in TOBA-PET copolyester,in which TOBA was synthesized by PHB.更多还原