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P3HB4HB是3β-羟基丁酸酯(3HB)和4β-羟基丁酸酯(4HB)的共聚物。由微生物合成的P3HB4HB具有良好的生物相容性和生物降解性。本研究通过示差扫描热分析(DSC)研究了P3HB4HB的热性能;通过广角X-射线衍射(WAXD)分析了材料的结晶度;通过拉伸力学试验研究了材料的力学性能。结果表明,4HB含量越高,玻璃化转变温度越低,结晶温度越高,结晶度越低;P3HB4HB是一类力学性能接近于PCL或PLGA的生物高分子,通过调节4HB的含量,可以制备出具有不同力学性能的生物材料。
P3HB4HB is a copolymer of 3β-hydroxybutyrate (3HB) and 4β-hydroxybutyrate (4HB). P3HB4HB synthesized by microorganisms has good biocompatibility and biodegradability. In this study, the thermal properties of P3HB4HB were investigated by differential scanning calorimetry (DSC). The crystallinity of the material was analyzed by wide-angle X-ray diffraction (WAXD). The mechanical properties of the material were investigated by tensile testing. The results showed that the higher the 4HB content, the lower the glass transition temperature, the higher the crystallization temperature and the lower the crystallinity. P3HB4HB is a biopolymer with mechanical properties close to PCL or PLGA. By adjusting the content of 4HB, Biomaterials with different mechanical properties.