What are the classifications of biodegradable plastics?

Release time:2023-10-09 Number of views: 100

Biodegradable plastics now we may no longer be unfamiliar, this word in the current frequency is still relatively high, in fact, biodegradable plastics is in the ordinary plastic above the optimization of the performance, so that we can use it more safely. It is mainly in the natural environment conditions after the microbial activities can be quickly degraded. Ultimately, it can be degraded into carbon dioxide, water and other non-toxic and harmless small molecules of polymer composite materials.

In addition to the degradation of these materials, they should also meet certain requirements for use and processing. In general, they can be divided into many types, respectively:

1, natural polymer degradable plastics are biodegradable plastics made from natural substances such as starch, protein, chitin, cellulose and other natural substances that we usually see. Its raw materials are very abundant, inexpensive, relatively easy to be degraded by microorganisms, the product is safe and non-toxic, so more and more attention.

2, microbial synthesis of degradable plastics can be called a kind of bioplastics, we may rarely heard of this, it is actually the use of microorganisms through the development of their own movement to form polymer compounds. Characterized by excellent biocompatibility, it is widely used in biomedical and packaging fields.

3, chemical synthesis of degradable plastics used in the varieties are mainly aliphatic polyester, and aliphatic polycarbonate, etc., through the chemical composition of the ester structure of its molecular chain is easy to be decomposed in nature.

At present, with good prospects for development and industrial scale biodegradable plastics mainly include: polylactic acid (pla), production capacity of about 200kt/a; polybutylene succinate (pbs), production capacity of about 100kt/a; polybutylene terephthalate (pbta), production capacity of about 150kt/a; polyhydroxy fatty acid esters (pha), 30kt/a; polypropylene (ppc), 30kt/a; polypropylene (ppc), 30kt/a; polypropylene (ppc), 30kt/a; polypropylene (ppc), 30kt/a; and polypropylene (ppc), 30kt/a. Polypropylene (ppc), 35kt/a; Polycaprolactone, 10kt/a.