Overview of degradable plastics

Refers to a class of biodegradable plastic and its products can meet the performance requirements, while preserving performance of the same period, while in the natural environment after use conditions can degrade pairs environmentally friendly plastic material, so it is also referred to degradable plastics.
Polymer degradation is the result of chemical and physical factors polymeric macromolecules ingot fracture process. Polymer exposed to oxygen, water, heat light, rays, chemicals, pollutants, mechanical force. Insects, animals, and microorganisms and other environmental conditions, degradation of macromolecules strand breaks is known as environmental degradation. Degradation of the polymer molecular weight decreases, the polymer material properties is reduced until the polymer material of the loss can be used,hand sprayer  this phenomenon is also known as the aging degradation of the polymer material.
Both natural polymers and synthetic polymers are exposed to degradation under environmental conditions, but, in the same environmental conditions, a variety of polymers, in particular the sensitivity degradation of different synthetic polymers, and thus, various polymers solvability also vary, for example, polypropylene photooxidation easily degraded environmental conditions, and polystyrene in the same environmental conditions difficult to degrade, polyvinyl alcohol in the presence of certain microorganisms are easier to degradation of environmental conditions , while polyethylene, polypropylene, polystyrene difficult conditions in the same environment degradation.
Environmental degradation of biodegradable plastics mainly related to biodegradation, light and chemical degradation, and that the three main degradation processes mutual synergistic,liquid sprayer collaborative and coherent action. For example, photodegradation often simultaneously with the oxide degradation and promote each other; biodegradation more susceptible to degradation after the light.
The polymer degradation and aging stability of the polymer is directly related. Aging degradation of the polymer plastic shortening life. Therefore, since the inception of plastic, scientists working on the aging of these materials, namely stabilization studies to obtain high stability of the polymer material, and the current national scientists are using the aging degradation of the polymer Behavior racing to develop degradable plastics.