Which types of biodegradable materials can be classified according to the source of raw materials?

According to the raw material source of biodegradable plastics, it can be divided into two types: bio-based biodegradable plastics and petrochemical-based biodegradable plastics.

1. Bio-based biodegradable plastics

Bio-based biodegradable plastics can be divided into four main categories:

(1) Plastics directly processed from natural materials. At present, biodegradable plastics produced by natural polymers on the market mainly include thermoplastic starch, biocellulose, polysaccharides and polyamino acids, as well as their blending modification and chemical modification. Product of

(2) Polymers obtained through the joint participation of microbial fermentation and chemical synthesis, such as polylactic acid (PLA), etc.;

(3) Polymers directly synthesized by microorganisms, such as polyhydroxyalkanoate (PHA), etc.;

(4) Biodegradable plastics obtained by blending these materials or blending these materials with other chemically synthesized biodegradable plastics.

2. Petrochemical-based biodegradable plastics

Petrochemical-based biodegradable plastics refer to plastics obtained by polymerizing petrochemical monomers by chemical synthesis, such as polybutylene terephthalate (PBAT), polybutylene succinate (PBS) ), carbon dioxide copolymer (PPC), polyglycolic acid (PGA), etc.