“…Therefore, the development of biodegradable and recyclable polymers having the desirable material properties required in practical use has provided a partial solution for the current plastics pollution . In this context, polyhydroxyalkanoates (PHAs), a unique class of intracellular polyesters naturally produced by bacterial fermentation, feature excellent biocompatibility and biodegradability, − but without the erosion of mechanical properties in comparison with that of traditional petroleum-derived plastics, which allows PHAs to be widely used in the industry, agriculture, packaging, and pharmaceutical fields. , Currently, poly(3-hydroxybutyrate) (P3HB) is the most prominent and extensively studied PHAs, and it features a perfectly stereoregular structure and is used as a crystalline thermoplastic material . Although P3HB exhibits comparable mechanical properties, UV resistance, and oxygen permeability with isotactic polypropylene, the inherent brittleness, poor elasticity, and high degree of crystallinity impede its widespread application as renewable and biodegradable materials …”