What are the best method to make a polymer a More resistant

What are the best method to make a polymer; a. More resistant to thermal aging. b. More resistant to UV c. More resistant to oxidation.

Solution

Option b. and c.

Actually oxidation reaction degrades the quality of polymer and also it detoriates its properties.

Same in case of UV rays it attacks the polymer and may causes crack formation.

So these two are the most effective on polymer.