The specific time required for biodegradable plastics to degrade depends on factors such as their type and environment, and generally ranges from several months to several years.
1、 Types of biodegradable plastics
1. Photodegradable plastics
Photodegradable plastics refer to a type of biodegradable plastic that undergoes cracking under sunlight and is ultimately broken down into water, carbon dioxide, and biomass. Common photo degradable plastics include polylactic acid, corn starch, etc.
2. Thermodegradable plastics
Thermodegradable plastics refer to a type of biodegradable plastic that decomposes into small molecules at high temperatures and is ultimately degraded by microorganisms into water, carbon dioxide, and biomass. Common thermally degradable plastics include starch esters, polyesters, etc.
3. Biodegradable plastics
Biodegradable plastics refer to a type of biodegradable plastic that can be decomposed and degraded by microorganisms into water, carbon dioxide, biomass, and other harmless substances. Common biodegradable plastics include PHA (polyhydroxyalkanoate) plastics, PBS (polybutylene succinate) plastics, etc.
2、 Degradation time of biodegradable plastics
The degradation time of biodegradable plastics is influenced by various factors, including environmental temperature, oxygen concentration, humidity, etc. Generally speaking, the degradation time of biodegradable plastics ranges from several months to several years.
For example, polylactic acid (PLA) is a common photo degradable plastic that degrades in natural environments for 6 months to 2 years and can only be degraded in sunny environments. Biodegradable plastic PHA can be completely degraded within one year and can degrade in different environments.
Overall, the degradation time of biodegradable plastics is uncertain and needs to be determined based on factors such as their specific type and environment.
Post time: Aug-20-2024
