Plastic degradation is to reduce the molecular weight of polymer and the physical properties of polymer materials (plastics).
Typical performance is: plastic is brittle, broken, soft and hard, and loses its mechanical strength. The aging and deterioration of plastics is a degradation phenomenon. However, it will take decades and hundreds of years for ordinary plastics to degrade into environmentally harmless (less harmful) fragments or become carbon dioxide and water, and return to natural circulation.
Therefore, the rapid degradation technology is adopted now, and degradable polymer hydrocarbons and organic substances are selected to make plastics to prevent pollution.
Extended data:
China is one of the top ten countries producing and consuming plastic products in the world. 1995, China's plastic output was 5190,000 tons, and imported plastic was nearly 6 million tons. In that year, China's total plastic consumption was about1100000 tons, of which packaging plastics reached 21100000 tons.
The recycling value of plastic bags is low. Plastic bags are scattered in urban streets, tourist areas, water bodies, highways and railways during use, causing visual pollution and potential harm.
Plastic has a stable structure, is not easily degraded by natural microorganisms, and does not separate in the natural environment for a long time. This means that if the waste plastic garbage is not recycled, it will become a pollutant in the environment for a long time and accumulate continuously, causing great harm to the environment.
Baidu encyclopedia-plastic bag