Blending poly(propylene carbonate) (PPC) with poly(adipate?butylene terephthalate) (PBAT) was involved in the preparation of PPC/PBAT composites. However, the limited compatibility between the two materials hinders the potential performance enhancement of PPC/PBAT composites. To improve the compatibility between PPC and PBAT, maleic anhydride (MA) as a polar monomer and 2,5-dimethyl-2,5-bis(tert-butyl peroxy) hexane (DHBP) as an initiator were chosen for grafting onto PBAT to produce copolymer grafted Maleic anhydride (PBAT-g-MA).The interplay between PPC and PBAT-g-MA, as well as its impact on the properties of the blend, was thoroughly examined. The elongation at break of the blend was found to gradually increase with higher mass fraction of PBAT-g-MA. The elongation at break of PPC/PBAT-g-MA blends increased from 21.2% to 68.1%（60 and 40 are the quality scores of PPC and PBAT-g-MA, respectively）. Studies have shown that when the PBAT-g-MA content is lower than that of PPC, PBAT-g-MA functions as a uniformly dispersed phase within the PPC matrix. The anhydride group present in the material can effectively react with the end groups of PPC, thereby significantly enhancing compatibility between both phases and promoting stress transfer at interface layers to improve the mechanical properties of blends.

Graphite phase carbon nitride(g?C₃N₄), as an environmentally benign semiconductor material, has good application prospects in photocatalysis. However, the disadvantages of pure g?C₃N₄ such as small specific surface area and difficult separation of photogenerated carriers will limit its photocatalytic performance, which will restrict its large?scale application.From the synthetic methods and modification strategies, the research progress of g?C₃N₄ photocatalysts by researchers in recent years is reviewed, and the development of g?C₃N₄ photocatalysts in the fields of degradation of pollutants in water treatment, H₂ and H₂O₂ production is summarised, and it can be found that the performance of the modified g?C₃N₄ photocatalysts has been greatly improved.Finally,the development direction of g?C₃N₄ photocatalyst is prospected.