Why are polymers nonreactive?

Polymers are often nonreactive due to their large molecular size and stable chemical structure, which can hinder the accessibility of reactive sites. Their long chains can create a protective environment, making it difficult for other molecules to interact. Additionally, many polymers are composed of saturated bonds, which are less prone to undergo chemical reactions compared to unsaturated bonds. This combination of structural factors contributes to their overall stability and low reactivity.