CompositePro - thanks for the comments.
There has been some discussion how to study shelf-life of these items in the warehouse. The proposal is to accelerate aging with UV exposure or temperature. My understanding is the degradation mechanism in UV exposure is different than that of oxidation...
No chemical exposure. The only exposure has been ambient temperature over a 2+ year period.
No analytical work has been done. We could run FTIR, but what specifically would we be looking for? I presume we'd need a control or baseline.
I'm dealing with an ABS part that has lost significant tensile strength over time. The parts have been stored in plastic bags (not hermetically sealed), which are stored in cartons. The parts have been stored for around 2 years in a warehouse, where the temperature is generally controlled...