Sidenote, why is silicone able to accumulate so many airborne chemicals for testing? Tons of food/kitchen products are made of silicone and touted as food safe

Sidenote, why is silicone able to accumulate so many airborne chemicals for testing? Tons of food/kitchen products are made of silicone and touted as food safe. However, I always find that silicone kitchen products accumulate smells and then transfer these odors to the food, so I abhor them. This seems to confirm that mechanism.