Degradable materials are materials that can be degraded in the sense of thermodynamics and kinetics in a period of time. According to the external factors of degradation, it can be divided into: photodegradable materials, biodegradable materials, etc. the main influencing factors are temperature, molecular weight, material structure, etc.
According to the external factors of degradation, it can be divided into:
1. Photodegradable materials: degraded due to the action of sunlight;
2. Biodegradable materials: degraded due to the respiration or chemical energy synthesis of natural microorganisms such as fungi and bacteria, and decomposed into carbon dioxide and water;
3. Environmental degradation materials: degraded under natural environmental conditions such as light, heat, water, polluting compounds, microorganisms, insects, mechanical forces, etc.