Network optimization information:

Due to the rapid decline in the quality and molecular weight of the comb copolymer, the backbone is polar, which is conducive to the break of the ester bond. Therefore, the decomposition rate of comb-shaped molecular copolymers is greater than that of linear molecules.
 

The effect of monomer component ratio on polymer degradation.
 

The decomposition behavior of biodegradable materials is related to the physical and chemical properties of the material. The polarity, molecular weight and distribution of the polymer affect the decomposition performance of the material. Studies have shown that the decomposition of the copolymer has a great relationship with the molecular weight and crystallinity of the copolymer. For example, the crystallinity of a copolymer of glycolide and lactide is lower than the crystallinity of a homogeneous polymer of each of the two monomers.Glycolic acid has better hydrophilicity than lactic acid, so the PGLA copolymer containing more glycolide in degradable plastics has better hydrophilicity and faster degradation rate than the PGLA copolymer containing more lactide. . Hydrophilic polymers absorb large amounts of water, the molecules in the material are in full contact with water molecules, and the decomposition rate is fast. On the contrary, the molecules in the hydrophobic polymer have less contact with water molecules and the decomposition rate is slow.