用差示扫描量热法 (DSC) ,广角X射线衍射 (WAXD) ,傅立叶变换红外光谱 (FTIR)等技术研究了对苯二甲酸丁二酯 ε 己内酯 (PBT—PCL)多嵌段共聚物中硬链段的受限结晶。结果表明 ,PBT—PCL共聚酯中软硬链段在非晶区的混容性比较好 ,不同组成的样品均显示出一个玻璃化转变温度 ;对硬段含量超过 50 %的共聚酯来说 ,硬链段可以结晶 ,而软链段不能结晶 ;由于硬链段的受限特点 ,BT硬链段的结晶受软链段的影响和制约 ,其结晶能力随硬段序列长度的增加而逐渐增大。 The effects of polybutylene terephthalate ε-caprolactone (PBT-PCL) multiblock copolymerization on the properties of polybutadiene terephthalate were studied by differential scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD) and Fourier transform infrared spectroscopy (FTIR) Restricted crystallization of the hard segment of the material. The results show that the miscibility of soft and hard segments in PBT-PCL copolyester is good in amorphous region, and the samples with different compositions all show a glass transition temperature. For copolyester with hard segment content over 50% Said that the hard segment can crystallize and the soft segment can not crystallize. Due to the limited characteristics of the hard segment, the crystallization of the BT hard segment is affected and restricted by the soft segment, and its crystallization ability increases with the length of the hard segment sequence Increasingly.