That prompts a YES and NO answer. Technically, yes, there are photodegradable commercial polymers. The "photo" part simply means the polymer is attacked in some way by light (usually oxidized by UV with oxygen) to produce moieties that are more readily attacked by microorganisms. However, I suspect that you want the polymer to be what the lay person considers degradable; that is, essentially degrading to the point that they nearly "disappear". I am not aware of any polymers whatsoever that degrade by any means that will "disappear". Here is a URL to a video of a controlled degradation experiment. http://ecopolyuae.com/pop-video.html. You see it is stable for 18 months, then breaks down over some more months, leaving small pieces of undegraded polymer. Note this is a CONTROLLED lab test, not a real-world outside degradation experiment. I suspect real-world results to be less effective. For example, the biodegradable polymer used in some plastic pens and toys was produced from corn. It has "links" that are rather readily biodegraded that are mixed with other links that are very resistant to biodegradation. so, when it degrades, it essentially breaks into smaller pieces that do not readily degrade. This was tested in a field using a plastic film and after the first season, the film "degraded" into about 1 inch X 1 inch pieces. After the 2nd season, these pieces were still there.

Regit

Nearly all polymers are more or less photodegradable. Photodegradation is a surface reaction depending on the depth the active UV-light can enter the material. Most polymers are therefore stabilized against photodegradation.

A material that degrades rather quickly is PP or PA 6 or PA 66 especially in the form of fine fibres or films or ground material only basically stabilized.