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以芳族聚酯(PET)为硬链段,以脂族聚酯(PCL)为软链段的聚酯一聚酯嵌段共聚物,由于聚合反应过程中同时存在多种酯交换反应,链的化学结构变复杂了.应用核磁共振技术(氢谱和碳谱)和应用几种模型化合物的研究证明,PET—PCL嵌段共聚物软、硬链段间的联接有两种方式,软链段有两种结构形式,而硬链段的结构单元也有两种类型,从而确定了PET—PCL 嵌段共聚物链的化学结构.
Polyester-polyester block copolymer with aromatic polyester (PET) as hard segment and aliphatic polyester (PCL) as soft segment, due to the simultaneous presence of multiple transesterification reactions during the polymerization, the chain Of the chemical structure of complex.Application of nuclear magnetic resonance (hydrogen and carbon spectra) and the application of several model compounds of the study shows that, PET-PCL block copolymer soft and hard link between the two ways, the soft link The segment has two types of structures, and the hard segment has two types of building blocks to determine the chemical structure of the PET-PCL block copolymer chain.